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Taxon author: Greene

ITIS records citing taxon author "Greene"
 
 Kingdom Animalia
  Actia rufescens (Greene, 1934) -- valid
  Actiopsis rufescens Greene, 1934 -- invalid
  Agromyza aceris Greene, 1917 -- invalid
  Agromyza amelanchieris Greene, 1917 -- invalid
  Anastrepha braziliensis Greene, 1934 -- invalid
  Anastrepha chiclayae Greene, 1934 -- valid
  Anastrepha concava Greene, 1934 -- valid
  Anastrepha distincta Greene, 1934 -- valid
  Anastrepha flavipennis Greene, 1934 -- valid
  Anastrepha hendeli Greene, 1934 -- invalid
  Anastrepha longimacula Greene, 1934 -- invalid
  Anastrepha pallidipennis Greene, 1934 -- valid
  Anastrepha panamensis Greene, 1934 -- valid
  Anastrepha passiflorae Greene, 1934 -- valid
  Anastrepha robusta Greene, 1934 -- valid
  Anastrepha similis Greene, 1934 -- valid
  Anastrepha townsendi Greene, 1934 -- valid
  Anastrepha trinidadensis Greene, 1934 -- invalid
  Anastrepha urichi Greene, 1934 -- valid
  Anastrepha zeteki Greene, 1934 -- valid
  Apheloglutus Greene, 1934 -- invalid
  Apheloglutus latifrons Greene, 1934 -- invalid
  Apocephalus coecum Greene, 1938 -- invalid
  Attamyia texanus Greene, 1938 -- invalid
  Bombus huntii Greene, 1860 -- valid
  Bombus occidentalis Greene, 1858 -- valid
  Bombus suckleyi Greene, 1860 -- valid
  Calopelta fallax Greene, 1921 -- invalid
  Campostoma oligolepis Hubbs and Greene, 1935 -- valid -- largescale stoneroller
  Chaetostigmoptera manca (Greene, 1934) -- valid
  Chrysotoxum coloradense Greene, 1918 -- invalid
  Clinodiplosis phlox (Greene, 1941) -- valid
  Conophorus fallax (Greene, 1921) -- valid
  Glabellula crassicornis (Greene, 1924) -- valid
  Hapleginella conicola (Greene, 1918) -- valid
  Hermetia cingulatus Greene, 1940 -- valid
  Hermetia panamensis Greene, 1940 -- valid
  Hybopsis amnis (Hubbs and Greene in Hubbs, 1951) -- valid -- pallid chub, pallid shiner
  Hyperdiplosis phlox Greene, 1941 -- invalid
  Lestodiplosis maculipennis Greene, 1941 -- valid
  Madiza conicola Greene, 1918 -- invalid
  Myrmosicarius texanus (Greene, 1938) -- valid
  Mythicomyia californica Greene, 1924 -- valid
  Mythicomyia minuta Greene, 1924 -- valid
  Mythicomyia minutum Greene, 1924 -- invalid
  Myxosargus nigricormis Greene, 1918 -- valid
  Notropis amnis Hubbs and Greene in Hubbs, 1951 -- invalid -- pallid shiner
  Pachyneres crassicornis Greene, 1924 -- invalid
  Patelloa meracanthae (Greene, 1921) -- valid
  Phasmophaga floridensis (Greene, 1934) -- valid
  Phorocera meracanthae Greene, 1921 -- invalid
  Phytobia amelanchieris (Greene, 1917) -- valid -- agromyze de l'amélanchier, amelanchier twig borer
  Phytomyptera latifrons (Greene, 1934) -- valid
  Phytomyptera ruficornis (Greene, 1934) -- valid
  Plectops manca Greene, 1934 -- invalid
  Pseudacteon grandis Greene, 1941 -- invalid
  Psithyrus suckleyi (Greene, 1860) -- invalid
  Roeseliopsis floridensis Greene, 1934 -- invalid
  Schizotachina ruficornis Greene, 1934 -- invalid
  Tachytrechus bipunctatus Greene, 1922 -- invalid
  Tachytrechus granditarsis Greene, 1922 -- valid
  Tachytrechus rotundipennis Greene, 1922 -- valid
  Tachytrechus simulatus Greene, 1922 -- valid
  Tachytrechus tenuiseta Greene, 1922 -- valid
  Volucella nigra Greene, 1923 -- invalid
 
 Kingdom Plantae
  Abronia ammophila Greene -- accepted -- Wyoming sand verbena, Yellowstone sand verbena
  Abronia angustifolia Greene -- accepted -- purple sand verbena
  Abronia carnea Greene -- not accepted
  Acer diffusum Greene -- not accepted
  Acer glabrum ssp. diffusum (Greene) E. Murray -- not accepted
  Acer glabrum ssp. neomexicanum (Greene) E. Murray -- not accepted
  Acer glabrum ssp. torreyi (Greene) E. Murray -- not accepted
  Acer glabrum var. diffusum (Greene) Smiley -- accepted -- Rocky Mountain maple
  Acer glabrum var. neomexicanum (Greene) Kearney & Peebles -- accepted -- New Mexico maple
  Acer glabrum var. torreyi (Greene) Smiley -- accepted -- Torrey's maple
  Acer neo-mexicanum Greene -- not accepted
  Acer neomexicanum Greene -- not accepted
  Acer torreyi Greene -- not accepted
  Achillea subalpina Greene -- not accepted
  Acmispon argophyllus var. niveus (Greene) Brouillet -- accepted -- Santa Cruz Island silverhosackia
  Acmispon argyraeus (Greene) Brouillet -- accepted -- canyon bird's-foot trefoil
  Acmispon argyraeus var. argyraeus (Greene) Brouillet -- accepted -- canyon bird's-foot trefoil
  Acmispon dendroideus (Greene) Brouillet -- accepted -- island broom
  Acmispon dendroideus var. dendroideus (Greene) Brouillet -- accepted -- island broom
  Acmispon dendroideus var. veatchii (Greene) Brouillet -- accepted -- Veatch's island broom
  Acmispon grandiflorus var. macranthus (Greene) Brouillet -- accepted -- chaparral bird's-foot trefoil
  Acmispon junceus var. biolettii (Greene) Brouillet -- accepted -- Bioletti's rush broom
  Acmispon nevadensis var. davidsonii (Greene) Brouillet -- accepted -- Davidson's bird's-foot trefoil
  Acmispon procumbens (Greene) Brouillet -- accepted -- silky deerweed
  Acmispon procumbens var. procumbens (Greene) Brouillet -- accepted -- silky deerweed
  Acomastylis Greene -- not accepted
  Acomastylis rossii (R. Br.) Greene -- not accepted
  Acomastylis rossii var. rossii (R. Br.) Greene -- not accepted
  Aconitum columbianum ssp. viviparum (Greene) D.E. Brink -- accepted -- Columbian monkshood
  Aconitum columbianum var. bakeri (Greene) H.D. Harr. -- not accepted
  Aconitum geranioides Greene -- not accepted
  Aconitum hansenii Greene -- not accepted
  Aconitum infectum Greene -- not accepted -- Arizona monkshood
  Aconitum leibergii Greene -- not accepted
  Aconitum mogollonicum Greene -- not accepted
  Aconitum viviparum Greene -- not accepted
  Actaea arguta var. viridiflora (Greene) Tidestr. -- not accepted
  Actinea acaulis var. arizonica (Greene) S.F. Blake -- not accepted
  Actinea herbacea (Greene) B.L. Rob. -- not accepted
  Adlumia fungosa (Aiton) Greene ex Britton, Sterns & Poggenb. -- accepted -- Allegheny vine, climbing fumitory, mountain-fringe
  Agalinis decemloba (Greene) Pennell -- accepted -- ten-lobed false foxglove
  Agalinis neoscotica (Greene) Fernald -- accepted -- Middleton false foxglove
  Agalinis paupercula var. neoscotica (Greene) Pennell & H. St. John -- not accepted
  Agalinis purpurea var. neoscotica (Greene) B. Boivin -- not accepted
  Agaloma marilandica (Greene) House -- not accepted
  Agastache rupestris (Greene) Standl. -- accepted -- thread-leaf giant hyssop, threadleaf giant hyssop
  Ageratina jucunda (Greene) Clewell & Woot. -- accepted -- hammock snakeroot, lesser snakeroot
  Ageratina thyrsiflora (Greene) R.M. King & H. Rob. -- accepted -- congested snakeroot
  Agnorhiza invenusta (Greene) W.A. Weber -- accepted -- Coville's mule-ears
  Agnorhiza reticulata (Greene) W.A. Weber -- accepted -- El Dorado mule-ears
  Agoseris alpestris (A. Gray) Greene -- not accepted
  Agoseris apargioides (Less.) Greene -- accepted -- woolly goat chicory
  Agoseris apargioides var. apargioides (Less.) Greene -- accepted -- woolly goat chicory
  Agoseris arizonica Greene -- not accepted
  Agoseris aurantiaca (Hook.) Greene -- accepted -- orange agoseris, orange-flowered false-dandelion
  Agoseris aurantiaca var. aurantiaca (Hook.) Greene -- accepted -- Mill Creek agoseris, orange agoseris
  Agoseris barbellulata (Greene ex A. Gray) Greene -- not accepted
  Agoseris elata (Nutt.) Greene -- not accepted -- tall agoseris
  Agoseris glauca var. monticola (Greene) Q. Jones ex Cronquist -- not accepted -- pale agoseris
  Agoseris graminifolia Greene -- not accepted
  Agoseris grandiflora (Nutt.) Greene -- accepted -- bigflower agoseris, shortbeak agoseris
  Agoseris grandiflora var. grandiflora (Nutt.) Greene -- accepted
  Agoseris heterophylla (Nutt.) Greene -- accepted -- annual agoseris, annual goatsbeard, mountain dandelion
  Agoseris heterophylla var. heterophylla (Nutt.) Greene -- accepted -- annual agoseris
  Agoseris heterophylla var. kymapleura Greene -- not accepted
  Agoseris hirsuta (Hook.) Greene -- not accepted
  Agoseris laciniata (Nutt.) Greene -- not accepted
  Agoseris monticola Greene -- accepted -- pale agoseris
  Agoseris parviflora (Nutt.) Greene -- accepted -- false agoseris, Steppe agoseris
  Agoseris plebeja (Greene) Greene -- not accepted
  Agoseris retrorsa (Benth.) Greene -- accepted -- spearleaf agoseris
  Agoseris scorzonerifolia (Schrad.) Greene -- not accepted
  Agoseris X dasycarpa Greene -- accepted
  Agoseris X elata (Nutt.) Greene (pro sp.) -- accepted -- tall agoseris
  Aldenella tenuifolia (Torr. & A. Gray) Greene -- not accepted
  Aliciella formosa (Greene ex Brand) J.M. Porter -- accepted -- Aztec gilia
  Alisma brevipes Greene -- not accepted
  Alisma plantago-aquatica ssp. brevipes (Greene) Sam. -- not accepted
  Alisma plantago-aquatica var. brevipes (Greene) Vict. -- not accepted
  Allionia rotundifolia Greene -- not accepted
  Allium crispum Greene -- accepted -- crinkled onion
  Allium dichlamydeum Greene -- accepted -- coastal onion
  Allium dictyotum Greene -- not accepted
  Allium peninsulare Lemmon ex Greene -- accepted -- Mexicali onion, peninsula onion
  Allium peninsulare var. crispum (Greene) Jeps. -- not accepted
  Allium peninsulare var. peninsulare Lemmon ex Greene -- accepted -- peninsula onion
  Allocarya austiniae Greene -- not accepted
  Allocarya californica (Fisch. & C.A. Mey.) Greene -- not accepted
  Allocarya chorisiana (Cham.) Greene -- not accepted
  Allocarya chorisiana var. hickmanii (Greene) Jeps. -- not accepted
  Allocarya cognata Greene -- not accepted
  Allocarya cooperi Greene -- not accepted
  Allocarya cusickii Greene -- not accepted
  Allocarya diffusa Greene -- not accepted
  Allocarya greenei (A. Gray) Greene -- not accepted
  Allocarya hirta Greene -- not accepted
  Allocarya hispidula Greene -- not accepted
  Allocarya humistrata Greene -- not accepted
  Allocarya leptoclada Greene -- not accepted
  Allocarya lithocarya Greene ex A. Gray -- not accepted
  Allocarya mollis (A. Gray) Greene -- not accepted
  Allocarya mollis var. vestita (Greene) Jeps. -- not accepted
  Allocarya scopulorum Greene -- not accepted
  Allocarya scouleri (Hook. & Arn.) Greene -- not accepted
  Allocarya scripta Greene -- not accepted
  Allocarya stipitata Greene -- not accepted
  Allocarya stricta Greene -- not accepted
  Allocarya tener Greene -- not accepted
  Allocarya trachycarpa (A. Gray) Greene -- not accepted
  Alyssum americanum Greene -- not accepted
  Amaranthus viscidulus Greene -- accepted -- sticky amaranth
  Amarella plebeja (Ledeb. ex Spreng.) Greene -- not accepted
  Amarella scopulorum Greene -- not accepted
  Amarella strictiflora (Rydb.) Greene -- not accepted
  Ambrosia chamissonis (Less.) Greene -- accepted -- beach-bur, silver bur ragweed, silver burr ragweed
  Amelanchier alnifolia var. pallida (Greene) Jeps. -- not accepted
  Amelanchier bakeri Greene -- not accepted
  Amelanchier glabra Greene -- not accepted
  Amelanchier pallida Greene -- not accepted -- pale serviceberry
  Amelanchier polycarpa Greene -- not accepted
  Amelanchier prunifolia Greene -- not accepted
  Amellus spinulosus Pursh non Machaeranthera spinulosus Greene -- not accepted
  Amorpha californica var. hispidula (Greene) E.J. Palmer -- not accepted
  Amsinckia barbata Greene -- not accepted
  Amsinckia grandiflora (Kleeb. ex A. Gray) Kleeb. ex Greene -- accepted -- large-flowered fiddleneck, largeflowered fiddleneck
  Amsinckia spectabilis var. microcarpa (Greene) Jeps. & Hoover -- not accepted
  Anaphalis margaritacea var. occidentalis Greene -- not accepted
  Anaphalis occidentalis (Greene) A. Heller -- not accepted
  Androsace acuta Greene -- not accepted
  Androsace elongata ssp. acuta (Greene) G.T. Robbins -- accepted -- California rockjasmine
  Androstephium caeruleum (Scheele) Greene -- not accepted -- blue funnel lily
  Androstephium coeruleum (Scheele) Greene -- accepted -- blue funnel lily, blue funnellily
  Aneilema pinetorum (Greene) Matuda -- not accepted
  Anemone multiceps (Greene) Standl. -- accepted -- Porcupine River thimbleweed
  Anotites dorrii (Kellogg) Greene -- not accepted
  Anotites menziesii (Hook.) Greene -- not accepted
  Anotites viscosa Greene -- not accepted
  Antennaria acuminata Greene -- not accepted
  Antennaria aizoides Greene -- not accepted
  Antennaria alpina var. media (Greene) Jeps. -- not accepted
  Antennaria alpina var. scabra (Greene) Jeps. -- not accepted
  Antennaria ambigens (Greene) Fernald -- not accepted
  Antennaria angustata Greene -- not accepted
  Antennaria aprica Greene -- not accepted
  Antennaria arkansana Greene -- not accepted
  Antennaria arnoglossa Greene -- not accepted
  Antennaria arnoglossa var. ambigens Greene -- not accepted
  Antennaria athabascensis Greene -- not accepted
  Antennaria bakeri Greene -- not accepted
  Antennaria bifrons Greene -- not accepted
  Antennaria borealis Greene -- not accepted
  Antennaria brainerdii Greene -- not accepted
  Antennaria callilepis Greene -- not accepted
  Antennaria callophylla Greene -- not accepted
  Antennaria calophylla Greene -- not accepted
  Antennaria campestris var. athabascensis (Greene) B. Boivin -- not accepted
  Antennaria canadensis Greene -- not accepted
  Antennaria candida Greene -- not accepted
  Antennaria carpathica Greene -- not accepted
  Antennaria carpatica Greene -- accepted
  Antennaria chlorantha Greene -- not accepted
  Antennaria confinis Greene -- not accepted
  Antennaria decipiens Greene -- not accepted
  Antennaria densa Greene -- not accepted
  Antennaria dioica var. hyperborea (D. Don) Greene -- not accepted
  Antennaria dioica var. marginata (Greene) Jeps. -- not accepted
  Antennaria dioica var. rosea (Greene) D.C. Eaton -- not accepted
  Antennaria erosa Greene -- not accepted
  Antennaria exilis Greene -- not accepted
  Antennaria eximia Greene -- not accepted
  Antennaria fallax Greene -- not accepted
  Antennaria fallax var. calophylla (Greene) Fernald -- not accepted
  Antennaria farwellii Greene -- not accepted
  Antennaria fendleri Greene -- not accepted
  Antennaria formosa Greene -- not accepted
  Antennaria glabrata (J. Vahl) Greene -- not accepted
  Antennaria holmii Greene -- not accepted
  Antennaria howellii Greene -- accepted -- Howell's pussytoes, small pussytoes
  Antennaria howellii ssp. canadensis (Greene) Bayer -- accepted -- Canadian pussytoes
  Antennaria howellii ssp. howellii Greene -- accepted -- Howell's pussytoes
  Antennaria howellii ssp. neodioica (Greene) Bayer -- accepted -- Howell's pussytoes, small pussytoes
  Antennaria howellii var. athabascensis (Greene) B. Boivin -- not accepted
  Antennaria hygrophila Greene -- not accepted
  Antennaria insularis Greene -- not accepted
  Antennaria isolepis Greene -- not accepted
  Antennaria lanata (Hook.) Greene -- accepted -- woolly pussytoes
  Antennaria lanulosa Greene -- not accepted
  Antennaria latisquamea Greene -- not accepted
  Antennaria longifolia Greene -- not accepted
  Antennaria lunellii Greene -- not accepted
  Antennaria maculata Greene -- not accepted
  Antennaria marginata Greene -- accepted -- whitemargin pussytoes
  Antennaria media Greene -- accepted -- Rocky Mountain pussytoes
  Antennaria media ssp. pulchella (Greene) Chmiel. -- not accepted
  Antennaria mesochora Greene -- not accepted
  Antennaria modesta Greene -- not accepted
  Antennaria monocephala (Torr. & A. Gray) Greene non Antennaria monocephala DC. -- not accepted
  Antennaria monocephala ssp. angustata (Greene) Hultén -- accepted -- pygmy pussytoes
  Antennaria monocephala ssp. angustifolia (Greene) Hultén -- not accepted
  Antennaria monocephala var. exilis (Greene) Hultén -- not accepted
  Antennaria nardina Greene -- not accepted
  Antennaria nebraskensis Greene -- not accepted
  Antennaria neeglecta var. howellii (Greene) Hultén -- not accepted
  Antennaria neglecta Greene -- accepted -- field pussytoes
  Antennaria neglecta ssp. howellii (Greene) Hultén -- not accepted
  Antennaria neglecta var. athabascensis (Greene) Roy L. Taylor & MacBryde -- not accepted
  Antennaria neglecta var. canadensis (Greene) Cronquist -- not accepted
  Antennaria neglecta var. howellii (Greene) Cronquist -- not accepted
  Antennaria neglecta var. neodioica (Greene) Cronquist -- not accepted
  Antennaria nemoralis Greene -- not accepted
  Antennaria neodioica Greene -- not accepted
  Antennaria neodioica ssp. canadensis (Greene) Bayer & Stebbins -- not accepted
  Antennaria neodioica ssp. howellii (Greene) Bayer -- not accepted
  Antennaria neodioica var. chlorantha (Greene) B. Boivin -- not accepted
  Antennaria nitens Greene -- not accepted
  Antennaria nitida Greene -- not accepted
  Antennaria obtusata Greene -- not accepted
  Antennaria occidentalis Greene -- not accepted
  Antennaria oxyphylla Greene -- not accepted
  Antennaria parlinii ssp. fallax (Greene) Bayer & Stebbins -- accepted -- Parlin's pussytoes
  Antennaria parlinii var. arnoglossa (Greene) Fernald -- not accepted
  Antennaria parlinii var. farwellii (Greene) B. Boivin -- not accepted
  Antennaria parvifolia sensu Greene non Nutt. -- not accepted -- smallleaf pussytoes
  Antennaria parvula Greene -- not accepted
  Antennaria pedicellata Greene -- not accepted
  Antennaria peramoena Greene -- not accepted
  Antennaria petasites Greene -- not accepted
  Antennaria pinetorum Greene -- not accepted
  Antennaria plantaginifolia var. ambigens (Greene) Cronquist -- not accepted
  Antennaria plantaginifolia var. arnoglossa (Greene) Cronquist -- not accepted
  Antennaria pulchella Greene -- accepted -- beautiful pussytoes, Sierra pussytoes
  Antennaria pulcherrima (Hook.) Greene -- accepted -- showy pussytoes
  Antennaria pulcherrima ssp. pulcherrima (Hook.) Greene -- accepted -- handsome pussy-toes, showy pussy-toes
  Antennaria pulvinata Greene -- not accepted
  Antennaria pumila Greene -- not accepted
  Antennaria pyramidata Greene -- not accepted
  Antennaria recurva Greene -- not accepted
  Antennaria rosea Greene -- accepted -- rosy pussy-toes, rosy pussytoes
  Antennaria rosea ssp. confinis (Greene) Bayer -- accepted -- rosy pussytoes
  Antennaria rosea ssp. pulvinata (Greene) Bayer -- accepted -- pulvinate pussytoes
  Antennaria rosea ssp. rosea Greene -- accepted -- rosy pussytoes
  Antennaria rosea var. nitida (Greene) Breitung -- not accepted
  Antennaria sansonii Greene -- not accepted
  Antennaria scabra Greene -- not accepted
  Antennaria sedoides Greene -- not accepted
  Antennaria sordida Greene -- not accepted
  Antennaria speciosa Greene -- not accepted
  Antennaria stenolepis Greene -- not accepted
  Antennaria suffrutescens Greene -- accepted -- evergreen everlasting
  Antennaria umbellata Greene -- not accepted
  Antennaria unbellata Greene -- not accepted
  Antennaria wilsonii Greene -- not accepted
  Antennaria X erigeroides Greene -- accepted -- erigeron pussytoes
  Antennaria X foliacea Greene (pro sp.) -- accepted -- foliaceous pussytoes
  Antennaria X macounii Greene (pro sp.) -- accepted
  Antirrhinum kelloggii Greene -- not accepted
  Apocynum ambigens Greene -- not accepted
  Apocynum androsaemifolium ssp. androsaemifolium var. griseum (Greene) Bég. & Beloserky -- not accepted -- spreading dogbane
  Apocynum androsaemifolium ssp. pumilum var. tomentellum (Greene) B. Boivin -- not accepted -- spreading dogbane
  Apocynum androsaemifolium var. griseum (Greene) Bég. & Beloserky -- not accepted
  Apocynum androsaemifolium var. tomentellum (Greene) B. Boivin -- not accepted
  Apocynum cannabinum var. suksdorfii (Greene) Bég. & Beloserky -- not accepted
  Apocynum medium Greene -- not accepted
  Apocynum medium var. floribundum (Greene) Woodson -- not accepted
  Apocynum medium var. leuconeuron (Greene) Woodson -- not accepted
  Apocynum medium var. lividum (Greene) Woodson -- not accepted
  Apocynum medium var. sarniense (Greene) Woodson -- not accepted
  Apocynum medium var. vestitum (Greene) Woodson -- not accepted
  Apocynum pumilum (A. Gray) Greene -- not accepted
  Apocynum pumilum var. rhomboideum (Greene) Bég. & Beloserky -- not accepted
  Apocynum scopulorum Greene ex Rydb. -- not accepted
  Apocynum sibiricum var. cordigerum (Greene) Fernald -- not accepted
  Apocynum sibiricum var. farwellii (Greene) Woodson -- not accepted
  Apocynum sibiricum var. salignum (Greene) Fernald -- not accepted
  Apocynum suksdorfii Greene -- not accepted
  Apocynum suskdorfii Greene -- not accepted
  Apocynum X floribundum Greene (pro. sp.) -- accepted -- hybrid dogbane, intermediate dogbane
  Aquilegia canadensis var. eminens (Greene) B. Boivin -- not accepted
  Aquilegia canadensis var. latiscula (Greene) Munz -- not accepted
  Aquilegia canadensis var. latiuscula (Greene) Munz -- not accepted
  Aquilegia elegantula Greene -- accepted -- western red columbine
  Aquilegia formosa var. hypolasia (Greene) Munz -- accepted
  Aquilegia formosa var. pauciflora (Greene) Boothman -- not accepted
  Aquilegia latiuscula Greene -- not accepted
  Arabis aculeolata Greene -- accepted -- Waldo rockcress
  Arabis acutina Greene -- not accepted
  Arabis angulata Greene -- not accepted
  Arabis atrorubens Suksd. ex Greene -- not accepted
  Arabis breweri var. austinae (Greene) Rollins -- not accepted -- Chico Creek rockcress
  Arabis breweri var. austiniae (Greene) Rollins -- not accepted -- Brewer's rockcress
  Arabis campyloloba Greene -- not accepted
  Arabis conferta Greene -- not accepted
  Arabis confinis var. interposita (Greene) S.L. Welsh & Reveal -- not accepted
  Arabis connexa Greene -- not accepted
  Arabis consanguinea Greene -- not accepted
  Arabis covillei Greene -- not accepted
  Arabis dacotica Greene -- not accepted
  Arabis davidsonii Greene -- not accepted -- Davidson's rockcress
  Arabis davidsonii var. davidsonii Greene -- not accepted -- Davidson's rockcress
  Arabis decotica Greene -- not accepted
  Arabis demissa Greene -- not accepted -- nodding rockcress
  Arabis demissa var. demissa Greene -- not accepted -- nodding rockcress
  Arabis dianthifolia Greene -- not accepted
  Arabis divaricarpa var. dacotica (Greene) B. Boivin -- not accepted
  Arabis divaricarpa var. interposita (Greene) Rollins -- not accepted
  Arabis drepanoloba Greene -- not accepted
  Arabis drummondii var. connexa (Greene) Fernald -- not accepted
  Arabis drummondii var. oxphylla (Greene) M. Hopkins -- not accepted
  Arabis drummondii var. oxyphylla (Greene) M. Hopkins -- not accepted
  Arabis duriuscula Greene -- not accepted
  Arabis eremophila Greene -- not accepted
  Arabis fendleri (S. Watson) Greene -- not accepted -- fendler rockcress, Fendler's rockcress
  Arabis fendleri var. fendleri (S. Watson) Greene -- not accepted -- Fendler's rockcress
  Arabis filifolia Greene -- not accepted
  Arabis formosa Greene -- not accepted
  Arabis gracilenta Greene -- not accepted
  Arabis gracilipes Greene -- not accepted -- Flagstaff rockcress
  Arabis hastatula Greene -- not accepted -- eared rockcress
  Arabis holboellii var. consanguinea (Greene) G.A. Mulligan -- not accepted
  Arabis inamoena Greene -- not accepted
  Arabis interposita Greene -- not accepted
  Arabis laevigata var. missouriensis (Greene) H.E. Ahles -- not accepted
  Arabis leibergii Greene -- not accepted
  Arabis lemmonii var. drepanoloba (Greene) Rollins -- not accepted -- soldier rockcress
  Arabis maxima Greene -- not accepted
  Arabis missouriensis Greene -- not accepted -- green rockcress
  Arabis oligantha Greene -- not accepted
  Arabis oxylobula Greene -- not accepted -- Glenwood Springs rockcress
  Arabis oxyphylla Greene -- not accepted
  Arabis pendulina Greene -- not accepted -- nodding rockcress, rabbit ear rockcress, rabbit-ear rockcress, rabbitear rockcress
  Arabis pendulina var. pendulina Greene -- not accepted -- rabbit ear rockcress, rabbitear rockcress
  Arabis peramoena Greene -- not accepted
  Arabis platyloba Greene -- not accepted
  Arabis polyantha Greene -- not accepted
  Arabis polytricha Greene -- not accepted
  Arabis purpurascens Howell ex Greene -- not accepted
  Arabis recondita Greene -- not accepted
  Arabis rectissima Greene -- not accepted -- bristlyleaf rockcress
  Arabis rectissima var. rectissima Greene -- not accepted -- bristlyleaf rockcress
  Arabis rhodantha Greene -- not accepted
  Arabis rhodanthus Greene -- not accepted
  Arabis setigera Greene -- not accepted
  Arabis setulosa Greene -- not accepted
  Arabis sparsiflora var. atrorubens (Suksd. ex Greene) Rollins -- not accepted -- elegant rockcress
  Arabis sparsiflora var. peramoena (Greene) Rollins -- not accepted
  Arabis subserrata Greene -- not accepted
  Arabis suffrutescens var. horizontalis (Greene) Rollins -- not accepted -- horizontal woody rockcress
  Arabis tenuicula Greene -- not accepted
  Arabis tenuis Greene -- not accepted
  Arabis trichopoda Greene -- not accepted
  Aragallus articulatus Greene -- not accepted
  Aragallus hudsonicus Greene -- not accepted
  Aragallus splendens (Douglas ex Hook.) Greene -- not accepted
  Aragallus ventosus Greene -- not accepted
  Arctostaphylos insularis Greene ex Parry -- accepted -- island manzanita
  Arctostaphylos patula Greene -- accepted -- greenleaf manzanita
  Arctostaphylos patula Greene -- not accepted
  Arctostaphylos X media Greene (pro sp.) -- accepted -- intermediate manzanita
  Argemone bipinnatifida Greene -- not accepted
  Argemone corymbosa Greene -- accepted -- Mojave prickly poppy, Mojave pricklypoppy
  Argemone corymbosa ssp. corymbosa Greene -- accepted -- Mojave pricklypoppy
  Argemone gracilenta Greene -- accepted -- Sonoran prickly poppy, Sonoran pricklypoppy
  Argemone leiocarpa Greene -- not accepted
  Argemone pleiacantha Greene -- accepted -- southwestern prickly poppy, southwestern pricklypoppy
  Argemone pleiacantha ssp. pleiacantha Greene -- accepted -- southwestern prickly poppy, southwestern pricklypoppy
  Argemone sanguinea Greene -- accepted -- red pricklypoppy, spiny pricklypoppy
  Argemone squarrosa Greene -- accepted -- hedgehog pricklypoppy
  Argemone squarrosa ssp. squarrosa Greene -- accepted -- hedgehog pricklypoppy
  Arnica alpina ssp. attenuata (Greene) Maguire -- not accepted
  Arnica alpina ssp. lonchophylla (Greene) Roy L. Taylor & MacBryde -- not accepted
  Arnica alpina var. attenuata (Greene) Ediger & T.M. Barkley -- not accepted
  Arnica alpina var. lonchophylla (Greene) S.L. Welsh -- not accepted
  Arnica angustifolia ssp. attenuata (Greene) G.W. Douglas -- not accepted
  Arnica angustifolia ssp. lonchophylla (Greene) G.W. Douglas & G. Ruyle-Douglas -- not accepted
  Arnica arnoglossa Greene -- not accepted
  Arnica bernardina Greene -- not accepted
  Arnica chamissonis ssp. foliosa var. bernardina (Greene) Maguire -- not accepted -- Chamisso arnica
  Arnica chamissonis var. bernardina (Greene) Maguire -- not accepted -- Chamisso arnica
  Arnica fulgens var. sororia (Greene) G.W. Douglas & G. Ruyle-Douglas -- not accepted
  Arnica lessingii Greene -- accepted -- nodding arnica
  Arnica lonchophylla Greene -- accepted -- longleaf arnica, seep arnica
  Arnica lonchophylla ssp. arnoglossa (Greene) Maguire -- not accepted -- seep arnica
  Arnica lonchophylla ssp. lonchophylla Greene -- not accepted -- arnica lonchophylle sous-espčce lonchophylle, longleaf arnica
  Arnica lonchophylla var. arnoglossa (Greene) B. Boivin -- not accepted
  Arnica mollis var. aspera (Greene) B. Boivin -- not accepted
  Arnica mollis var. silvatica (Greene) Maguire -- not accepted
  Arnica ovata Greene -- accepted -- rayless arnica, sticky leaf arnica
  Arnica parryi ssp. sonnei (Greene) Maguire -- not accepted -- Sonne's arnica
  Arnica parryi var. sonnei (Greene) Cronquist -- not accepted
  Arnica rydbergii Greene -- accepted -- Rydberg's arnica, subalpine arnica
  Arnica sonnei Greene -- not accepted
  Arnica sororia Greene -- accepted -- twin arnica
  Arnica spathulata Greene -- accepted -- Klamath arnica
  Arnica tomentella Greene -- not accepted
  Arnica X diversifolia Greene (pro sp.) -- not accepted -- Curtis churchmouse threeawn, rayless arnica, sticky arnica
  Artemisia franserioides Greene -- accepted -- ragweed sagebrush
  Artemisia neomexicana Greene ex Rydb. -- not accepted
  Asclepias californica Greene -- accepted -- California milkweed, round-hood milkweed, woolly milkweed
  Asclepias californica ssp. californica Greene -- accepted -- California milkweed, round-hood milkweed, woolly milkweed
  Asclepias emoryi (Greene) Vail -- accepted -- Emory's milkweed
  Asclepias uncialis Greene -- accepted -- wheel milkweed
  Asclepias uncialis ssp. uncialis Greene -- not accepted -- wheel milkweed
  Aster adsurgens auct. non Greene -- not accepted
  Aster aquifolius (Greene ex Woot. & Standl.) S.F. Blake -- not accepted
  Aster boltoniae Greene -- not accepted
  Aster brickellioides Greene -- not accepted
  Aster brickellioides var. brickellioides Greene -- not accepted -- brickellbush aster
  Aster brickellioides var. glabratus Greene -- not accepted
  Aster chilensis var. invenustus (Greene) Jeps. -- not accepted -- Pacific aster
  Aster chilensis var. lentus (Greene) Jeps. -- not accepted
  Aster chilensis var. sonomensis (Greene) Jeps. -- not accepted
  Aster cichoriaceus (Greene) S.F. Blake -- not accepted
  Aster covillei (Greene) S.F. Blake ex M. Peck -- not accepted
  Aster elatus (Greene) Cronquist -- not accepted
  Aster elmeri Greene -- not accepted
  Aster frondeus (A. Gray) Greene -- not accepted
  Aster glaucodes var. formosus (Greene) Kittell -- not accepted -- gray aster
  Aster hesperius var. laetevirens (Greene) Cronquist -- not accepted
  Aster hesperius var. wootonii Greene -- not accepted
  Aster hydrophilus Greene ex Woot. & Standl. -- not accepted
  Aster inornatus Greene -- not accepted
  Aster invenustus Greene -- not accepted
  Aster laetevirens Greene -- not accepted
  Aster ledophyllus var. covillei (Greene) Cronquist -- not accepted
  Aster lentus Greene -- not accepted -- Suisun Marsh aster
  Aster leucanthemifolius Greene -- not accepted
  Aster linearis (Greene) Cory -- not accepted
  Aster sonomensis Greene -- not accepted
  Aster tagetinus (Greene) S.F. Blake -- not accepted
  Aster tomentellus (Greene) Frye & Rigg non Hook. -- not accepted
  Aster wootonii (Greene) Greene -- not accepted
  Aster yosemitanus (A. Gray) Greene -- not accepted
  Astragalus albens Greene -- accepted -- Cushenbury milk-vetch, Cushenbury milkvetch
  Astragalus anemophilus Greene -- accepted
  Astragalus bigelovii var. marcidus (Greene ex Rydb.) Isely -- not accepted
  Astragalus bigelovii var. mogollonicus (Greene) Barneby -- not accepted
  Astragalus californicus (A. Gray) Greene -- accepted -- Klamath Basin milkvetch
  Astragalus clevelandii Greene -- accepted -- Cleveland's milkvetch
  Astragalus convallarius Greene -- accepted -- lesser rushy milkvetch, timber milkvetch
  Astragalus convallarius var. convallarius Greene -- accepted -- lesser rushy milkvetch, timber milkvetch
  Astragalus earlei Greene ex Rydb. -- not accepted
  Astragalus gambelianus ssp. elmeri (Greene) Abrams -- not accepted
  Astragalus gilensis Greene -- accepted -- Gila milkvetch
  Astragalus humistratus var. hosackiae (Greene) M.E. Jones -- accepted -- groundcover milkvetch
  Astragalus layneae Greene -- accepted -- widow's milkvetch
  Astragalus lentiginosus var. wilsonii (Greene) Barneby -- accepted -- Wilson milkvetch, Wilson's milkvetch
  Astragalus magdalenae Greene -- not accepted
  Astragalus magdalenae Greene -- accepted -- satiny milkvetch
  Astragalus miguelensis Greene -- accepted -- San Miguel milkvetch
  Astragalus mollissimus var. earlei (Greene ex Rydb.) Tidestr. -- accepted -- Earle's woolly locoweed, Earle's woolly milkvetch, woolly locoweed
  Astragalus mollissimus var. marcidus (Greene ex Rydb.) Barneby -- accepted -- Davis Mountains locoweed, withered wooly milk-vetch, woolly locoweed, woolly milkvetch
  Astragalus mollissimus var. mogollonicus (Greene) Barneby -- accepted -- Mogollon woolly locoweed, Mogollon woolly milkvetch, woolly locoweed
  Astragalus pachypus Greene -- accepted -- thickpod milkvetch
  Astragalus pachypus var. pachypus Greene -- accepted -- thickpod milkvetch
  Astragalus pauperculus Greene -- accepted -- depauperate milkvetch
  Astragalus puniceus var. gertrudis (Greene) Barneby -- accepted -- Trinidad milkvetch
  Astragalus recedens (Greene ex Rydb.) Ced. Porter -- not accepted
  Astragalus recurvus Greene -- accepted -- recurved milkvetch
  Astragalus rusbyi Greene -- accepted -- Rusby's milkvetch
  Astragalus whitneyi var. sonneanus (Greene) Jeps. -- accepted -- balloonpod milkvetch
  Atamosco atamasca (L.) Greene -- not accepted
  Atamosco atamasco (L.) Greene -- not accepted
  Atamosco rosea (Lindl.) Greene -- not accepted
  Atamosco simpsonii (Chapm.) Greene -- not accepted
  Atamosco treatiae (S. Watson) Greene -- not accepted
  Athysanus Greene -- accepted -- sandweed
  Athysanus pusillus (Hook.) Greene -- accepted -- common sandweed, dwarf anthysanus
  Aucuparia subvestita (Greene) Nieuwl. -- not accepted
  Baeria chrysostoma ssp. hirsutula (Greene) Ferris -- not accepted
  Baeria debilis Greene ex A. Gray -- not accepted
  Baeria fremontii var. conjugens (Greene) Ferris -- not accepted
  Baeria hirsutula (Greene) Greene -- not accepted
  Baeria microglossa (DC.) Greene -- not accepted
  Bahiopsis parishii (Greene) E.E. Schill. & Panero -- accepted -- Parish's goldeneye
  Batidaea sandbergii Greene -- not accepted
  Batidea (Dumort.) Greene -- not accepted
  Batidea acalyphacea Greene -- not accepted
  Batidea amplissima Greene -- not accepted
  Batidea arizonica Greene -- not accepted
  Batidea cataphracta Greene -- not accepted
  Batidea dacotica Greene -- not accepted
  Batidea elegantula Greene -- not accepted
  Batidea filipendula Greene -- not accepted
  Batidea heterodoxa Greene -- not accepted
  Batidea itascica Greene -- not accepted
  Batidea laetissima Greene -- not accepted
  Batidea peramoena Greene -- not accepted
  Batidea strigosa (Michx.) Greene -- not accepted
  Batidea subarctica Greene -- not accepted
  Batidea subcordata Greene -- not accepted
  Batidea unicolor Greene -- not accepted
  Batidea viburnifolia Greene -- not accepted
  Bebbia (Benth.) Greene -- accepted -- bebbia, sweetbush
  Bebbia juncea (Benth.) Greene -- accepted -- sweetbush, sweetbush bebbia
  Bebbia juncea var. aspera (Benth.) Greene -- accepted -- bebbia, sweetbush
  Bebbia juncea var. juncea (Benth.) Greene -- accepted -- sweetbush
  Berberis pumila Greene -- accepted -- creeping barberry
  Bidens amplissima Greene -- accepted -- Vancouver Island beggarticks
  Bidens elegans Greene -- not accepted
  Bidens glaucescens Greene -- not accepted
  Bidens hyperborea Greene -- accepted -- estuary beggarticks
  Bidens hyperborea var. hyperborea Greene -- not accepted -- estuary beggarticks
  Bidens vulgata Greene -- accepted -- big devil's beggartick, tall beggarticks, western sticktight
  Bidens vulgata var. puberula (Wiegand) Greene -- not accepted
  Bilderdykia cilinodis (Michx.) Greene -- not accepted
  Bilderdykia cristata (Engelm. & A. Gray) Greene -- not accepted
  Bilderdykia scandens (L.) Greene -- not accepted
  Bistorta plumosa (Small) Greene -- accepted -- meadow bistort
  Blepharizonia Greene -- accepted -- blepharizonia
  Blepharizonia laxa Greene -- accepted -- big tarweed
  Blepharizonia plumosa (Kellogg) Greene -- accepted -- big tarweed
  Blepharizonia plumosa ssp. plumosa (Kellogg) Greene -- accepted -- big tarweed
  Bloomeria crocea var. montana (Greene) J.W. Ingram -- accepted -- common goldenstar
  Boechera acutina (Greene) Windham & Al-Shehbaz -- accepted
  Boechera atrorubens (Suksd. ex Greene) Windham & Al-Shehbaz -- accepted -- elegant rockcress
  Boechera consanguinea (Greene) Windham & Al-Shehbaz -- accepted
  Boechera covillei (Greene) Windham & Al-Shehbaz -- accepted -- pioneer rockcress
  Boechera davidsonii (Greene) N.H. Holmgren -- accepted -- Davidson's rockcress
  Boechera demissa (Greene) W.A. Weber -- not accepted
  Boechera demissa var. pendulina (Greene) N.H. Holmgren -- not accepted
  Boechera drepanoloba (Greene) Windham & Al-Shehbaz -- accepted -- soldier rockcress
  Boechera formosa (Greene) Windham & Al-Shehbaz -- accepted -- beautiful rockcress
  Boechera gracilenta (Greene) Windham & Al-Shehbaz -- accepted -- Selby's rockcress
  Boechera gracilipes (Greene) Dorn -- accepted -- Flagstaff rockcress
  Boechera hastatula (Greene) Al-Shehbaz -- accepted -- eared rockcress
  Boechera horizontalis (Greene) Windham & Al-Shehbaz -- accepted -- horizontal woody rockcress
  Boechera lemmonii var. drepanoloba (Greene) Dorn -- not accepted
  Boechera missouriensis (Greene) Al-Shehbaz -- accepted -- green rockcress
  Boechera oxylobula (Greene) W.A. Weber -- accepted -- Glenwood Springs rockcress
  Boechera paupercula (Greene) Windham & Al-Shehbaz -- accepted -- Lyall's rockcress
  Boechera pendulina (Greene) W.A. Weber -- accepted -- rabbit ear rockcress
  Boechera polyantha (Greene) Al-Shehbaz -- accepted
  Boechera pratincola (Greene) Windham & Al-Shehbaz -- accepted
  Boechera rectissima (Greene) Al-Shehbaz -- accepted -- bristlyleaf rockcress
  Boisduvalia stricta (A. Gray) Greene -- not accepted
  Bossekia Neck. ex Greene -- not accepted
  Bossekia odorata (L.) Greene -- not accepted
  Boykinia elata (Nutt.) Greene -- not accepted
  Brevoortia venusta Greene -- not accepted
  Brickellia chenopodina (Greene) B.L. Rob. -- accepted -- chenopod brickellbush
  Brickellia lemmonii var. wootonii (Greene) B.L. Rob. -- not accepted -- Lemmon's brickellbush
  Brintonia Greene -- accepted -- mock goldenrod
  Brintonia discoidea (Elliott) Greene -- accepted -- rayless mock goldenrod
  Brodiaea californica ssp. leptandra (Greene) J.C. Pires -- accepted -- California brodiaea
  Brodiaea californica var. leptandra (Greene) Hoover -- not accepted -- California brodiaea
  Brodiaea coronaria ssp. rosea (Greene) T.F.Niehaus -- accepted -- Indian Valley brodiaea
  Brodiaea coronaria var. rosea (Greene) Hoover -- not accepted
  Brodiaea hendersonii (Greene) S. Watson -- not accepted
  Brodiaea ida-maia (Alph. Wood) Greene -- not accepted
  Brodiaea laxa var. candida (Greene) Jeps. -- not accepted
  Brodiaea leptandra (Greene) Baker -- not accepted
  Brodiaea lugens (Greene) Baker -- not accepted
  Brodiaea lutea var. analina (Greene) Munz -- not accepted
  Brodiaea lutea var. anilina (Greene) Munz -- not accepted
  Brodiaea lutea var. scabra (Greene) Munz -- not accepted
  Brodiaea orcuttii (Greene) Baker -- accepted -- Orcutt's brodiaea
  Brodiaea pulchella (Salisb.) Greene -- not accepted
  Brodiaea rosea (Greene) Baker -- not accepted
  Brodiaea scabra (Greene) Baker -- not accepted
  Brodiaea scabra var. analina (Greene) M.E. Peck -- not accepted
  Brodiaea scabra var. anilina (Greene) Baker -- not accepted
  Brodiaea venusta (Greene) Greene -- not accepted
  Cakile fusiformis Greene -- not accepted
  Cakile lanceolata ssp. fusiformis (Greene) Rodman -- accepted -- coastal searocket
  Calamagrostis porteri ssp. insperata (Swallen) C.W. Greene -- accepted -- Porter's reedgrass
  Calamagrostis stricta ssp. inexpansa (A. Gray) C.W. Greene -- accepted -- northern reedgrass, slim-stem reed grass
  Calamagrostis stricta var. lacustris (Kearney) C.W. Greene -- not accepted
  Calliprora ixioides (W.T. Aiton) Greene -- not accepted
  Calliprora ixioides var. lugens (Greene) Abrams -- not accepted
  Calliprora scabra Greene -- not accepted
  Calliprora scabra var. analina Greene -- not accepted
  Calliprora scabra var. anilina Greene -- not accepted
  Callisteris arizonica Greene -- not accepted
  Callitropsis arizonica (Greene) D.P. Little -- accepted -- Arizona cypress
  Calochortus albus var. rubellus Greene -- not accepted
  Calochortus amoenus Greene -- accepted -- purple fairy-lantern
  Calochortus excavatus Greene -- accepted -- Inyo County star-tulip, Inyo mariposa lily
  Calochortus invenustus Greene -- accepted -- plain mariposa lily
  Calochortus plummerae Greene -- accepted -- Plummer's mariposa lily
  Caltha chelidonii Greene -- not accepted
  Calycadenia campestris Greene -- not accepted
  Calycadenia ciliosa Greene -- not accepted
  Calycadenia elegans Greene -- not accepted
  Calycadenia hispida (Greene) Greene -- not accepted
  Calycadenia hispida ssp. hispida (Greene) Greene -- not accepted -- hispid western rosinweed
  Calycadenia multiglandulosa ssp. bicolor (Greene) D.D. Keck -- not accepted
  Calycadenia oppositifolia (Greene) Greene -- accepted -- Butte County western rosinweed
  Calycadenia pauciflora var. elegans (Greene) Jeps. -- not accepted
  Calycadenia ramulosa Greene -- not accepted
  Calycadenia scabrella (E. Drew) Greene -- not accepted
  Calycadenia spicata (Greene) Greene -- accepted -- spiked western rosinweed
  Calyptridium monospermum Greene -- not accepted
  Calyptridium umbellatum (Torr.) Greene -- not accepted
  Calyptridium umbellatum var. umbellatum (Torr.) Greene -- not accepted
  Calystegia collina (Greene) Brummitt -- accepted -- coast range false bindweed
  Calystegia collina ssp. collina (Greene) Brummitt -- accepted -- coast range false bindweed
  Calystegia fulcrata ssp. malacophylla (Greene) Brummitt -- not accepted
  Calystegia fulcrata ssp. tomentella (Greene) Brummitt -- not accepted
  Calystegia fulcrata var. deltoidea (Greene) Brummitt -- not accepted
  Calystegia macounii (Greene) Brummitt -- accepted -- Macoun's false bindweed
  Calystegia macrostegia (Greene) Brummitt -- accepted -- island false bindweed
  Calystegia macrostegia ssp. arida (Greene) Brummitt -- accepted -- island false bindweed
  Calystegia macrostegia ssp. macrostegia (Greene) Brummitt -- accepted -- island false bindweed
  Calystegia malacophylla (Greene) Munz -- accepted -- Sierra false bindweed
  Calystegia malacophylla ssp. malacophylla (Greene) Munz -- accepted -- Sierra false bindweed
  Calystegia malacophylla ssp. malacophylla var. malacophylla (Greene) Munz -- not accepted -- Sierra false bindweed
  Calystegia malacophylla ssp. tomentella (Greene) Munz -- not accepted
  Calystegia malacophylla var. deltoidea (Greene) Munz -- not accepted
  Calystegia malacophylla var. malacophylla (Greene) Munz -- accepted -- Sierra false bindweed
  Calystegia occidentalis ssp. occidentalis var. tomentella (Greene) Brummitt -- not accepted -- chaparral false bindweed
  Calystegia occidentalis var. tomentella (Greene) Brummitt -- accepted -- chaparral false bindweed
  Calystegia polymorpha (Greene) Munz -- not accepted
  Calystegia purpurata (Greene) Brummitt -- accepted -- Pacific false bindweed
  Calystegia purpurata ssp. purpurata (Greene) Brummitt -- accepted -- Pacific false bindweed
  Calystegia sepium ssp. binghamiae (Greene) Brummitt -- accepted -- Bingham's false bindweed
  Calystegia sepium ssp. limnophila (Greene) Brummitt -- accepted -- hedge false bindweed
  Camassia quamash (Pursh) Greene -- accepted -- common camas, small camas
  Camassia quamash ssp. quamash (Pursh) Greene -- accepted -- small camas
  Camissonia campestris (Greene) P.H. Raven -- accepted -- Mojave suncup
  Camissonia campestris ssp. campestris (Greene) P.H. Raven -- accepted -- Mojave suncup
  Camissonia hilgardii (Greene) P.H. Raven -- not accepted -- Hilgard's suncup
  Camissonia hirtella (Greene) P.H. Raven -- not accepted -- Santa Cruz Island suncup
  Camissoniopsis hirtella (Greene) W.L. Wagner & Hoch -- accepted -- Santa Cruz Island suncup
  Campanula aurita Greene -- accepted -- Yukon bellflower
  Campanula wilkinsiana Greene -- accepted -- Wilkin's harebell, Wilkins' bellflower
  Cardamine breweri var. orbicularis (Greene) Detling -- not accepted -- Brewer's bittercress, Sierra bittercress
  Cardamine californica (Nutt.) Greene -- accepted -- milkmaids
  Cardamine californica ssp. cuneata (Greene) O.E. Schulz -- not accepted
  Cardamine californica var. californica (Nutt.) Greene -- not accepted -- milkmaids
  Cardamine californica var. cardiophylla (Greene) Rollins -- not accepted -- milkmaids, Vaca Mountain toothwort
  Cardamine californica var. cuneata (Greene) Rollins -- not accepted -- milkmaids
  Cardamine californica var. sinuata (Greene) O.E. Schulz -- not accepted -- milkmaids
  Cardamine cardiophylla Greene -- not accepted
  Cardamine cuneata Greene -- not accepted
  Cardamine foliacea Greene -- not accepted
  Cardamine gemmata Greene -- not accepted -- yellow-tubered toothwort
  Cardamine hederifolia Greene -- not accepted
  Cardamine integrifolia (Nutt.) Greene -- not accepted
  Cardamine integrifolia var. sinuata (Greene) C.L. Hitchc. -- not accepted
  Cardamine nuttallii Greene -- accepted -- Nuttall's toothwort
  Cardamine nuttallii var. gemmata (Greene) Rollins -- not accepted -- Nuttall's toothwort
  Cardamine nuttallii var. nuttallii Greene -- not accepted -- palmate toothwort
  Cardamine nuttallii var. pulcherrima (Greene) Roy L. Taylor & MacBryde -- not accepted
  Cardamine orbicularis Greene -- not accepted
  Cardamine pulcherrima Greene -- not accepted
  Cardamine pulcherrima Greene -- not accepted
  Cardamine umbellata Greene -- accepted -- umbel bittercress
  Cardamine vallicola Greene -- not accepted
  Cardiobatus Greene -- not accepted
  Cardiobatus nivalis (Douglas ex Hook.) Greene -- not accepted
  Carduus inamoenus Greene -- not accepted
  Carduus macounii Greene -- not accepted
  Carduus nevadensis Greene -- not accepted
  Carduus pulchellus Greene -- not accepted
  Carduus truncatus Greene -- not accepted
  Carsonia Greene -- accepted -- fewleaved bee-plant, spiderflower
  Carsonia sparsifolia (S. Watson) Greene -- accepted -- fewleaf spiderflower
  Cassia fasciculata var. puberula (Greene) J.F. Macbr. -- not accepted
  Castalia elegans (Hook.) Greene -- not accepted
  Castalia flava (Leitn.) Greene -- not accepted
  Castalia tuberosa (Paine) Greene -- not accepted
  Castilleja confusa Greene -- not accepted
  Castilleja culbertsonii Greene -- not accepted -- Culbertson Indian paintbrush
  Castilleja hololeuca Greene -- not accepted
  Castilleja hololeuca Greene -- not accepted -- white-felted paintbrush
  Castilleja lanata ssp. hololeuca (Greene) T.I. Chuang & Heckard -- accepted -- whitefelt Indian paintbrush
  Castilleja lineata Greene -- accepted -- marsh-meadow Indian paintbrush, marshmeadow Indian paintbrush
  Castilleja subinclusa Greene -- accepted -- longleaf Indian paintbrush
  Castilleja subinclusa ssp. subinclusa Greene -- accepted -- longleaf Indian paintbrush
  Cathartolinum neomexicanum (Greene) Small -- not accepted
  Caulanthus lasiophyllus var. rigidus (Greene) Payson -- not accepted
  Ceanothus arboreus Greene -- accepted -- feltleaf ceanothus
  Ceanothus connivens Greene -- accepted -- trailing buckbrush
  Ceanothus greggii ssp. vestitus (Greene) Thorne -- not accepted -- Mojave ceanothus
  Ceanothus greggii var. vestitus (Greene) McMinn -- accepted -- Mojave ceanothus
  Ceanothus integerrimus var. puberulus (Greene) Abrams -- not accepted
  Ceanothus jepsonii Greene -- accepted -- Jepson ceanothus
  Ceanothus jepsonii ssp. jepsonii Greene -- not accepted -- Jepson ceanothus
  Ceanothus jepsonii var. jepsonii Greene -- accepted -- Jepson ceanothus
  Ceanothus leucodermis Greene -- accepted -- chaparral whitethorn
  Ceanothus prostratus ssp. pumilus (Greene) C.L. Schmidt -- not accepted -- dwarf ceanothus
  Ceanothus pumilus Greene -- accepted -- dwarf ceanothus
  Ceanothus ramulosus (Greene) McMinn -- not accepted
  Ceanothus vestitus Greene -- not accepted
  Ceanothus X bakeri Greene ex McMinn (pro. sp.) -- accepted -- Baker's ceanothus
  Ceanothus X flexilis Greene ex McMinn -- accepted -- flexible ceanothus
  Ceanothus X rugosus Greene (pro. sp.) -- accepted -- rugose ceanothus
  Centromadia Greene -- accepted
  Centromadia fitchii (A. Gray) Greene -- accepted -- Fitch's tarweed
  Centromadia parryi (Greene) Greene -- accepted -- Parry's false tarplant
  Centromadia parryi ssp. parryi (Greene) Greene -- accepted -- pappose tarweed
  Centromadia parryi ssp. rudis (Greene) B.G. Baldw. -- accepted -- pappose tarweed
  Centromadia pungens (Hook. & Arn.) Greene -- accepted -- pungent false tarplant
  Centromadia pungens ssp. maritima (Greene) B.G. Baldw. -- not accepted
  Centromadia pungens ssp. pungens (Hook. & Arn.) Greene -- accepted -- common tarweed
  Cerastium adsurgens Greene -- not accepted
  Cerastium alsophilum Greene -- not accepted
  Cerastium angustatum Greene -- not accepted
  Cerastium campestre Greene -- not accepted
  Cerastium confertum Greene -- not accepted
  Cerastium effusum Greene -- not accepted
  Cerastium fastigiatum Greene -- accepted -- fastigiate mouse-ear chickweed
  Cerastium nitidum Greene -- not accepted
  Cerastium occidentale Greene -- not accepted
  Cerastium oreophilum Greene -- not accepted
  Cerastium patulum Greene -- not accepted
  Cerastium pilosum Greene -- not accepted
  Cerastium scopulorum Greene -- not accepted
  Cerastium sonnei Greene -- not accepted
  Cerastium subulatum Greene -- not accepted
  Cerastium vestitum Greene -- not accepted
  Cercis canadensis var. orbiculata (Greene) Barneby -- not accepted
  Cercis occidentalis var. orbiculata (Greene) Tidestr. -- not accepted
  Cercis orbiculata Greene -- not accepted -- California redbud
  Chaenactis alpina var. leucopsis (Greene) Cockerell ex Stockw. -- not accepted
  Chaenactis alpina var. rubella (Greene) Stockw. -- not accepted
  Chaenactis angustifolia Greene -- not accepted
  Chaenactis brachiata Greene -- not accepted
  Chaenactis evermannii Greene -- accepted -- Evermann's pincushion
  Chaenactis glabriuscula var. aurea (Greene) Stockw. -- not accepted
  Chaenactis glabriuscula var. gracilenta (Greene) D.D. Keck -- not accepted
  Chaenactis glabriuscula var. orcuttiana (Greene) H.M. Hall -- accepted -- Orcutt's yellow pincushion
  Chaenactis leucopsis Greene -- not accepted -- alpine pincushion
  Chaenactis minuscula Greene -- not accepted
  Chaenactis orcuttiana (Greene) Parish -- not accepted
  Chaenactis santolinoides Greene -- accepted -- Santolina pincushion
  Chaenactis tanacetifolia var. gracilenta (Greene) Stockw. -- not accepted
  Chaenactis tenuifolia var. orcuttiana Greene -- not accepted
  Chaetopappa alsinoides (Greene) D.D. Keck -- not accepted
  Chaetopappa bellidiflora (Greene) D.D. Keck -- not accepted
  Chamaecrista aeschinomene (DC. ex Collad.) Greene -- not accepted
  Chamaecrista aspera (Muhl. ex Elliott) Greene -- not accepted
  Chamaecrista calycioides (DC. ex Collad.) Greene -- accepted -- woodland sensitive pea
  Chamaecrista chamaecristoides (Collad.) Greene -- accepted -- beach sensitive pea
  Chamaecrista depressa (Pollard) Greene -- not accepted
  Chamaecrista diphylla (L.) Greene -- accepted -- twoleaf sensitive pea
  Chamaecrista fasciculata (Michx.) Greene -- accepted -- partridge pea, showy partridgepea, sleepingplant
  Chamaecrista fasciculata var. fasciculata (Michx.) Greene -- accepted -- partridge pea, sleepingplant
  Chamaecrista flexuosa (L.) Greene -- accepted -- Texas sensitive pea
  Chamaecrista flexuosa var. flexuosa (L.) Greene -- accepted -- Texas sensitive pea
  Chamaecrista glandulosa (L.) Greene -- accepted -- Jamaican broom
  Chamaecrista glandulosa var. glandulosa (L.) Greene -- accepted -- Jamaican broom
  Chamaecrista lineata (Sw.) Greene -- accepted -- narrowpod sensitive pea
  Chamaecrista lineata var. lineata (Sw.) Greene -- accepted -- narrowpod sensitive pea
  Chamaecrista mimosoides (L.) Greene -- accepted -- chamaecrista
  Chamaecrista multipinnata (Pollard) Greene -- not accepted
  Chamaecrista patellaria (DC. ex Collad.) Greene -- not accepted
  Chamaecrista pilosa (L.) Greene -- accepted -- hairy sensitive pea
  Chamaecrista procumbens (L.) Greene -- not accepted
  Chamaecrista rotundifolia (Pers.) Greene -- accepted -- roundleaf sensitive pea
  Chamaecrista serpens (L.) Greene -- accepted -- slender sensitive pea, slender sensitive-pea
  Chamaecrista serpens var. serpens (L.) Greene -- accepted -- slender sensitive pea
  Chamaemorus Greene -- not accepted
  Chamaemorus anglica Greene -- not accepted
  Chamaemorus norvegica Greene -- not accepted
  Chamaesyce bartolomaei (Greene) Millsp. -- not accepted
  Chamaesyce neomexicana (Greene) Standl. -- not accepted
  Chamaesyce parishii (Greene) Millsp. ex Parish -- not accepted -- Parish's sandmat, Parish's spurge
  Chamaesyce rafinesquei (Greene) A. Heller -- not accepted
  Chamaesyce rusbyi (Greene) Millsp. -- not accepted
  Chamaesyce versicolor (Greene) Norton -- not accepted
  Chamomilla occidentalis (Greene) Rydb. -- not accepted
  Chaptalia alsophila Greene -- not accepted
  Chaptalia leucocephala Greene -- not accepted
  Chaptalia nutans var. texana (Greene) Burkart -- not accepted
  Chaptalia texana Greene -- accepted -- silverpuff
  Cheiranthus angustatus Greene -- not accepted
  Chondrophora virgata (Nutt.) Greene -- not accepted
  Chrysamphora californica (Torr.) Greene -- not accepted
  Chrysoma pauciflosculosa (Michx.) Greene -- accepted -- woody goldenrod
  Chrysopsis bakeri Greene -- not accepted
  Chrysopsis berlandieri Greene -- not accepted
  Chrysopsis camporum Greene -- not accepted
  Chrysopsis columbiana Greene -- not accepted
  Chrysopsis fastigiata Greene -- not accepted
  Chrysopsis fulcrata Greene -- not accepted
  Chrysopsis hirsutissima Greene -- not accepted
  Chrysopsis oregona var. rudis (Greene) Jeps. -- not accepted
  Chrysopsis pedunculata Greene -- not accepted
  Chrysopsis pumila Greene -- not accepted
  Chrysopsis rutteri (Rothr.) Greene -- not accepted
  Chrysopsis stenophylla (A. Gray) Greene -- not accepted
  Chrysopsis villosa var. camporum (Greene) Cronquist -- not accepted
  Chrysopsis villosa var. fastigiata (Greene) H.M. Hall -- not accepted
  Chrysopsis viscida (A. Gray) Greene -- not accepted
  Chrysothamnus albidus (M.E. Jones ex A. Gray) Greene -- not accepted -- alkali rabbitbrush, whiteflower rabbitbrush
  Chrysothamnus bolanderi (A. Gray) Greene -- not accepted
  Chrysothamnus frigidus Greene -- not accepted
  Chrysothamnus graveolens (Nutt.) Greene -- not accepted
  Chrysothamnus greenei (A. Gray) Greene -- accepted -- Greene's rabbitbrush
  Chrysothamnus howardii (Parry ex A. Gray) Greene -- not accepted
  Chrysothamnus humilis Greene -- accepted -- low rabbitbrush, Truckee rabbitbrush
  Chrysothamnus linifolius Greene -- not accepted -- spear-leaf rabbitbrush, spearleaf rabbitbrush
  Chrysothamnus nauseosus ssp. consimilis (Greene) H.M. Hall & Clem. -- not accepted
  Chrysothamnus nauseosus ssp. gnaphalodes (Greene) H.M. Hall & Clem. -- not accepted
  Chrysothamnus nauseosus ssp. junceus (Greene) H.M. Hall & Clem. -- not accepted
  Chrysothamnus nauseosus ssp. mohavensis (Greene) H.M. Hall & Clem. -- not accepted
  Chrysothamnus nauseosus ssp. pinifolius (Greene) H.M. Hall & Clem. -- not accepted
  Chrysothamnus nauseosus var. consimilis (Greene) H.M. Hall -- not accepted
  Chrysothamnus nauseosus var. gnaphalodes (Greene) H.M. Hall -- not accepted
  Chrysothamnus nauseosus var. junceus (Greene) H.M. Hall -- not accepted
  Chrysothamnus nauseosus var. mohavensis (Greene) H.M. Hall -- not accepted
  Chrysothamnus parryi (A. Gray) Greene -- not accepted
  Chrysothamnus parryi ssp. asper (Greene) H.M. Hall & Clem. -- not accepted
  Chrysothamnus parryi ssp. parryi (A. Gray) Greene -- not accepted -- Parry's rabbitbrush
  Chrysothamnus parryi ssp. vulcanicus (Greene) H.M. Hall & Clem. -- not accepted
  Chrysothamnus parryi var. asper (Greene) Munz -- not accepted
  Chrysothamnus parryi var. vulcanicus (Greene) Jeps. -- not accepted
  Chrysothamnus pulchellus (A. Gray) Greene -- not accepted -- southwest rabbitbrush, southwestern rabbitbrush
  Chrysothamnus pulchellus ssp. pulchellus (Gray) Greene -- not accepted -- southwestern rabbitbrush
  Chrysothamnus vaseyi (A. Gray) Greene -- accepted -- Vasey's rabbitbrush
  Chrysothamnus viscidiflorus ssp. elegans (Greene) H.M. Hall & Clem. -- not accepted
  Chrysothamnus viscidiflorus ssp. humilis (Greene) H.M. Hall & Clem. -- not accepted
  Chrysothamnus viscidiflorus ssp. linifolius (Greene) H.M. Hall & Clem. -- not accepted
  Chrysothamnus viscidiflorus ssp. viscidiflorus var. latifolius (D.C. Eaton) Greene -- not accepted
  Chrysothamnus viscidiflorus var. elegans (Greene) S.F. Blake -- not accepted
  Chrysothamnus viscidiflorus var. humilis (Greene) Jeps. -- not accepted
  Chrysothamnus viscidiflorus var. lanceolatus (Nutt.) Greene -- not accepted
  Chrysothamnus viscidiflorus var. latifolius (D.C. Eat.) Greene -- not accepted
  Chrysothamnus viscidiflorus var. latifolius (D.C. Eat.) Greene -- not accepted -- yellow rabbitbrush
  Chrysothamnus viscidiflorus var. linifolius (Greene) Kittell -- not accepted
  Cicuta occidentalis Greene -- not accepted
  Cirsium calcareum var. pulchellum (Greene) S.L. Welsh -- not accepted
  Cirsium californicum var. bernardinum (Greene) Petr. -- not accepted
  Cirsium callilepis (Greene) Jeps. -- not accepted
  Cirsium callilepis var. callilepis (Greene) Jeps. -- not accepted -- fringebract thistle
  Cirsium candidissimum (Greene) Davidson & Moxley -- not accepted
  Cirsium crassicaule (Greene) Jeps. -- accepted -- slough thistle
  Cirsium cymosum (Greene) J.T. Howell -- accepted -- peregrine thistle
  Cirsium cymosum var. cymosum (Greene) J.T. Howell -- accepted -- peregrine thistle
  Cirsium edule var. macounii (Greene) D.J. Keil -- accepted -- Macoun's thistle
  Cirsium fontinale (Greene) Jeps. -- accepted -- fountain thistle
  Cirsium fontinale var. fontinale (Greene) Jeps. -- accepted -- fountain thistle
  Cirsium hydrophilum (Greene) Jeps. -- accepted -- Suisun thistle
  Cirsium hydrophilum var. hydrophilum (Greene) Jeps. -- accepted -- Suisun thistle
  Cirsium inamoenum (Greene) D.J. Keil -- accepted
  Cirsium inamoenum var. inamoenum (Greene) D.J. Keil -- accepted -- Greene's thistle, Jackson Hole thistle
  Cirsium macounii (Greene) Rydb. -- not accepted
  Cirsium mohavense (Greene) Petr. -- accepted -- Mojave thistle, Rusby's thistle, virgin thistle
  Cirsium occidentale var. candidissimum (Greene) J.F. Macbr. -- accepted -- snowy thistle
  Cirsium occidentale var. venustum (Greene) Jeps. -- accepted -- cobwebby thistle
  Cirsium perennans (Greene) Woot. & Standl. -- not accepted
  Cirsium pulchellum (Greene) Woot. & Standl. -- not accepted
  Cirsium rusbyi (Greene) Petr. -- not accepted -- Rusby's thistle
  Cirsium scopulorum (Greene) Cockerell ex Daniels -- not accepted -- mountain thistle
  Cirsium validus Greene -- accepted -- graceful thistle
  Cirsium vaseyi var. hydrophilum (Greene) Petr. -- not accepted
  Cistanthe monosperma (Greene) Hershk. -- accepted -- oneseed pussypaws
  Clarkia breweri (A. Gray) Greene -- accepted -- fairy fans
  Clarkia concinna (Fisch. & C.A. Mey.) Greene -- accepted -- red ribbons
  Clarkia concinna ssp. concinna (Fisch. & C.A. Mey.) Greene -- accepted -- red ribbons
  Clarkia virgata Greene -- accepted -- Sierra clarkia
  Claytonia chrysantha Greene -- not accepted
  Claytonia lanceolata ssp. chrysantha (Greene) Ferris -- not accepted
  Claytonia lanceolata var. chrysantha (Greene) C.L. Hitchc. -- not accepted -- lanceleaf springbeauty
  Claytonia perfoliata ssp. perfoliata var. nubigena (Greene) Poelln. -- not accepted
  Claytonia perfoliata var. angustifolia Greene -- not accepted
  Claytonia perfoliata var. nubigena (Greene) Poelln. -- not accepted
  Clematis dictyota Greene -- not accepted
  Clematis pitcheri var. dictyota (Greene) W.M. Dennis -- accepted -- bluebill, Pitcher's clematis
  Cleome isomeris Greene -- not accepted -- bladderpod spiderflower, burrofat
  Cnicus amplifolius Greene -- not accepted
  Cochemiea pondii (Greene) Walton -- not accepted
  Colina Greene -- not accepted
  Collinsia concolor Greene -- accepted -- Chinese houses
  Collinsia sparsiflora var. arvensis (Greene) Jeps. -- accepted -- spinster's blue eyed Mary
  Collomia debilis (S. Watson) Greene -- accepted -- alpine collomia
  Collomia debilis var. debilis (S. Watson) Greene -- accepted -- alpine collomia
  Collomia diversifolia Greene -- accepted -- serpentine collomia
  Collomia rawsoniana Greene -- accepted -- flaming trumpet, Rawson's flaming trumpet
  Comarobatia Greene -- not accepted
  Comarobatia lasiococca (A. Gray) Greene -- not accepted
  Comarostaphylis diversifolia (Parry) Greene -- accepted -- summer holly, summer-blooming manzanita
  Comarostaphylis diversifolia ssp. diversifolia (Parry) Greene -- accepted -- summer holly, summer-holly
  Convallaria majuscula Greene -- not accepted -- American lily of the valley, American lily-of-the-valley
  Convolvulus americanus (Sims) Greene -- not accepted
  Convolvulus aridus Greene -- not accepted
  Convolvulus binghamiae Greene -- not accepted
  Convolvulus fulcratus (A. Gray) Greene -- not accepted
  Convolvulus fulcratus var. deltoideus (Greene) Jeps. -- not accepted
  Convolvulus macrostegius Greene -- not accepted
  Convolvulus malacophyllus Greene -- not accepted
  Convolvulus malacophyllus ssp. collinus (Greene) Abrams -- not accepted
  Convolvulus nyctagineus Greene -- not accepted
  Convolvulus occidentalis ssp. fruticetorus (Greene) Abrams -- not accepted
  Convolvulus occidentalis var. purpuratus (Greene) J.T. Howell -- not accepted
  Convolvulus polymorphus Greene -- not accepted
  Convolvulus subacaulis (Hook. & Arn.) Greene -- not accepted
  Convolvulus tomentellus Greene -- not accepted
  Coreopsis angustata Greene -- not accepted
  Corethrogyne filaginifolia var. brevicula (Greene) Canby -- not accepted
  Corethrogyne filaginifolia var. robusta Greene -- not accepted -- common sandaster
  Corethrogyne filaginifolia var. sessilis (Greene) Canby -- not accepted -- common sandaster
  Corethrogyne filaginifolia var. viscidula (Greene) D.D. Keck -- not accepted -- common sandaster
  Corethrogyne flagellaris Greene -- not accepted
  Corethrogyne floccosa Greene -- not accepted
  Corethrogyne scabra Greene -- not accepted
  Corethrogyne sessilis Greene -- not accepted
  Corethrogyne viscidula Greene -- not accepted
  Cotyledon rusbyi Greene -- not accepted
  Crataegus saligna Greene -- accepted -- willow hawthorn
  Crepis bakeri Greene -- accepted -- Baker's hawksbeard
  Crepis bakeri ssp. bakeri Greene -- accepted -- Baker's hawksbeard
  Crepis modocensis Greene -- accepted -- common hawksbeard, Modoc hawksbeard, Siskiyou hawksbeard
  Crepis modocensis ssp. modocensis Greene -- accepted -- Modoc hawksbeard
  Crepis platyphylla Greene -- not accepted
  Crockeria chrysantha Greene ex A. Gray -- not accepted
  Cryptantha affinis (A. Gray) Greene -- accepted -- common cryptantha, quill cryptantha
  Cryptantha ambigua (A. Gray) Greene -- accepted -- basin cryptantha, Wickes cryptantha, Wilkes cryptantha
  Cryptantha angustifolia (Torr.) Greene -- accepted -- bristlelobe cryptantha, narrowleaf pick-me-not, Panamint catseye, Panamint cryptantha
  Cryptantha bakeri (Greene) Payson -- accepted -- Baker's catseye, Baker's cryptantha
  Cryptantha barbigera (A. Gray) Greene -- accepted -- bearded catseye, bearded cryptantha
  Cryptantha cinerea (Greene) Cronquist -- accepted -- bownut cryptantha, James' catseye, James' cryptantha
  Cryptantha cinerea var. abortiva (Greene) Cronquist -- accepted -- James' catseye, James' cryptantha
  Cryptantha cinerea var. cinerea (Greene) Cronquist -- accepted -- James' catseye, James' cryptantha
  Cryptantha clevelandii Greene -- accepted -- Cleveland's cryptantha
  Cryptantha clevelandii var. clevelandii Greene -- accepted -- Cleveland's cryptantha
  Cryptantha confertiflora (Greene) Payson -- accepted -- basin yellow catseye, basin yellow cryptantha, roundleaf cryptantha
  Cryptantha corollata ssp. rattanii (Greene) Abrams -- not accepted
  Cryptantha crassisepala (Torr. & A. Gray) Greene -- accepted -- deertongue, thick-sepal catseye, thicksepal cryptantha
  Cryptantha crassisepala var. crassisepala (Torr. & A. Gray) Greene -- accepted -- thicksepal catseye, thicksepal cryptantha
  Cryptantha crinita Greene -- accepted -- Sacramento cryptantha, silky cryptantha
  Cryptantha dumetorum (Greene ex A. Gray) Greene -- accepted -- bush-loving catseye, bushloving cryptantha
  Cryptantha echinella Greene -- accepted -- hedgehog cryptantha, prickly cryptantha
  Cryptantha fendleri (A. Gray) Greene -- accepted -- Fendler's cryptantha, sanddune catseye, sanddune cryptantha
  Cryptantha flaccida (Douglas ex Lehm.) Greene -- accepted -- weakstem cryptantha
  Cryptantha fulvocanescens var. nitida (Greene) R.C. Sivinski -- accepted -- tawny cryptantha
  Cryptantha glomeriflora Greene -- accepted -- Truckee cryptantha
  Cryptantha hispidissima Greene -- not accepted
  Cryptantha hispidula Greene ex Brand -- accepted -- Napa cryptantha
  Cryptantha incana Greene -- accepted -- Tulare cryptantha
  Cryptantha intermedia (A. Gray) Greene -- accepted -- Clearwater catseye, Clearwater cryptantha, common cryptantha
  Cryptantha intermedia var. intermedia (A. Gray) Greene -- not accepted -- Clearwater catseye
  Cryptantha interrupta (Greene) Payson -- accepted -- Elko cryptantha
  Cryptantha jamesii var. abortiva (Greene) Payson -- not accepted
  Cryptantha jamesii var. cinerea (Greene) Payson -- not accepted
  Cryptantha kelseyana Greene -- accepted -- Kelsey's cryptantha
  Cryptantha leiocarpa (Fisch. & C.A. Mey.) Greene -- accepted -- coastal cryptantha
  Cryptantha maritima (Greene) Greene -- accepted -- Guadalupe catseye, Guadalupe cryptantha
  Cryptantha maritima var. maritima (Greene) Greene -- accepted -- Guadalupe catseye, Guadalupe cryptantha
  Cryptantha micromeres (A. Gray) Greene -- accepted -- pygmyflower cryptantha
  Cryptantha microstachys (Greene ex A. Gray) Greene -- accepted -- Tejon cryptantha
  Cryptantha mohavensis (Greene) Greene -- accepted -- Mojave cryptantha
  Cryptantha muricata var. denticulata (Greene) I.M. Johnst. -- not accepted -- pointed catseye, pointed cryptantha
  Cryptantha nemaclada Greene -- accepted -- Colusa cryptantha
  Cryptantha nubigena (Greene) Payson -- accepted -- Sierra cryptantha
  Cryptantha oxygona (A. Gray) Greene -- accepted -- sharpnut cryptantha, sharpseed cryptantha
  Cryptantha pattersonii (A. Gray) Greene -- not accepted
  Cryptantha pterocarya (Torr.) Greene -- accepted -- winged pick-me-not, wingnut catseye, wingnut cryptantha
  Cryptantha pterocarya var. cycloptera (Greene) J.F. Macbr. -- accepted -- wingnut catseye, wingnut cryptantha
  Cryptantha pterocarya var. pterocarya (Torr.) Greene -- accepted -- wingnut catseye, wingnut cryptantha
  Cryptantha pusilla (Torr. & A. Gray) Greene -- accepted -- low catseye, low cryptantha
  Cryptantha racemosa (S. Watson) Greene -- accepted -- brushy cryptantha, bushy cryptantha, forget-me-not cryptantha
  Cryptantha rattanii Greene -- accepted -- Rattan's cryptantha
  Cryptantha rostelata (Greene) Greene -- not accepted
  Cryptantha rostellata (Greene) Greene -- not accepted
  Cryptantha rostellata var. rostellata (Greene) Greene -- not accepted -- beaked catseye
  Cryptantha simulans Greene -- accepted -- pine cryptantha, pinewoods cryptantha
  Cryptantha sparsiflora (Greene) Greene -- accepted -- slender cryptantha
  Cryptantha texana (A. DC.) Greene -- accepted -- pick me nots
  Cryptantha thyrsiflora (Greene) Payson -- accepted -- calcareous catseye, calcareous cryptantha
  Cryptantha torreyana (A. Gray) Greene -- accepted -- Torrey's cat's-eye, Torrey's cryptantha
  Cryptantha torreyana var. calycosa (A. Gray) Greene -- not accepted
  Cryptantha torreyana var. torreyana (A. Gray) Greene -- not accepted -- Torrey's catseye
  Cryptantha utahensis (A. Gray) Greene -- accepted -- scented catseye, scented cryptantha, Utah cryptantha
  Cryptantha watsonii (A. Gray) Greene -- accepted -- Watson's cryptantha
  Cupressus arizonica Greene -- not accepted -- Arizona cypress, Arizona smooth cypress, cedro, cedro blanco, ciprés de Arizona, ciprés fibrosa, Cuyamaca cypress, Piute cypress
  Cupressus arizonica ssp. arizonica Greene -- not accepted -- Arizona cypress
  Dalea urceolata Greene -- accepted -- pine forest dalea, pineforest prairie clover, pineforest prairieclover
  Dasystephana interrupta (Greene) Rydb. -- not accepted
  Deinandra Greene -- accepted
  Deinandra fasciculata (DC.) Greene -- accepted -- clustered tarweed
  Deinandra kelloggii (Greene) Greene -- accepted -- Kellogg's tarweed
  Deinandra lobbii (Greene) Greene -- accepted -- threeray tarweed
  Delphinium andersoni var. cognatum (Greene) Ewan -- not accepted
  Delphinium andersonii ssp. cognatum (Greene) Ewan -- not accepted
  Delphinium andersonii var. cognatum (Greene) R.J. Davis -- not accepted
  Delphinium andersonii var. scaposum (Greene) S.L. Welsh -- not accepted
  Delphinium blochmaniae Greene -- not accepted
  Delphinium cognatum Greene -- not accepted
  Delphinium diversifolium Greene -- not accepted
  Delphinium geyeri Greene -- accepted -- Geyer's larkspur
  Delphinium glareosum Greene -- accepted -- Olympic larkspur
  Delphinium glareosum ssp. glareosum Greene -- not accepted -- Olympic larkspur
  Delphinium gracilentum Greene -- accepted -- pine forest larkspur
  Delphinium hansenii (Greene) Greene -- accepted -- Eldorado larkspur
  Delphinium hansenii ssp. arcuatum (Greene) Ewan -- not accepted
  Delphinium hansenii ssp. hansenii (Greene) Greene -- accepted -- Eldorado larkspur
  Delphinium hesperium var. hansenii Greene -- not accepted
  Delphinium hesperium var. recurvatum (Greene) K.C. Davis -- not accepted
  Delphinium leucophaeum Greene -- not accepted
  Delphinium luporum Greene -- not accepted
  Delphinium nelsonii Greene -- not accepted
  Delphinium parryi ssp. blochmaniae (Greene) F.H. Lewis & Epling -- accepted -- Blochman's larkspur, dune larkspur
  Delphinium recurvatum Greene -- accepted -- Byron larkspur, recurved larkspur
  Delphinium scaposum Greene -- accepted -- barestem larkspur, tall mountain larkspur
  Delphinium scopulorum var. luporum (Greene) Jeps. -- not accepted
  Delphinium sonnei Greene -- not accepted
  Delphinium tenuisectum Greene -- accepted -- carrotleaf larkspur
  Delphinium tenuisectum var. tenuisectum Greene -- not accepted
  Delphinium variegatum ssp. apiculatum (Greene) Ewan -- not accepted -- royal larkspur
  Delphinium variegatum var. apiculatum Greene -- not accepted
  Delphinium X burkei Greene (pro. sp.) -- accepted -- Burk larkspur, larkspur
  Dendromecon rigida ssp. rhamnoides (Greene) Thorne -- not accepted -- island tree poppy, tree poppy
  Dendromecon rigida var. rhamnoides (Greene) Munz -- not accepted
  Dentaria californica var. cardiophylla (Greene) Detling -- not accepted
  Dentaria californica var. cuneata (Greene) Detling -- not accepted
  Dentaria californica var. sinuata (Greene) Detling -- not accepted
  Dentaria gemmata (Greene) Howell -- not accepted
  Dentaria tenella var. pulcherrima (Greene) Detling -- not accepted
  Descurainia incana ssp. procera (Greene) Kartesz & Gandhi -- not accepted -- mountain tansymustard
  Descurainia obtusa (Greene) O.E. Schulz -- accepted -- blunt tansy mustard, blunt tansymustard
  Descurainia obtusa ssp. obtusa (Greene) O.E. Schulz -- not accepted -- blunt tansy mustard, blunt tansymustard
  Descurainia richardsonii ssp. procera (Greene) Detling -- not accepted
  Descurainia richardsonii var. procera (Greene) Breitung -- not accepted
  Dichelostemma ida-maia (Alph. Wood) Greene -- accepted -- firecracker flower
  Dichelostemma X venustum (Greene) Hoover (pro. sp.) -- not accepted -- rose firecracker flower, snakelily
  Dieteria bigelovii var. commixta (Greene) D.R. Morgan & R.L. Hartm. -- accepted
  Dieteria bigelovii var. mucronata (Greene) D.R. Morgan & R.L. Hartm. -- accepted
  Dieteria canescens var. leucanthemifolia (Greene) D.R. Morgan & R.L. Hartm. -- accepted
  Dieteria sessiliflora (Nutt.) Greene -- not accepted
  Diplacus arachnoideus Greene -- not accepted
  Diplacus clevelandii (Brandegee) Greene -- accepted -- Cleveland's bush monkeyflower
  Diplacus grandiflorus Greene -- not accepted -- largeflower bush monkeyflower
  Diplacus linearis (Benth.) Greene -- accepted -- chaparral bush monkeyflower
  Diplacus parviflorus Greene -- accepted -- island bush monkeyflower
  Disaccanthus validus Greene -- not accepted
  Distichlis spicata (L.) Greene -- accepted -- desert saltgrass, inland saltgrass, marsh spikegrass, saltgrass, seashore saltgrass
  Distichlis spicata ssp. spicata (L.) Greene -- accepted -- coastal saltgrass
  Distichlis spicata var. spicata (L.) Greene -- accepted
  Dodecatheon alpinum (A. Gray) Greene -- not accepted -- alpine shootingstar
  Dodecatheon alpinum ssp. alpinum (A. Gray) Greene -- not accepted -- alpine shootingstar
  Dodecatheon cleavelandii Greene -- not accepted
  Dodecatheon cleavelandii var. cleavelandii Greene -- not accepted
  Dodecatheon cleavelandii var. patulum (Greene) Thomps. -- not accepted
  Dodecatheon cleavelandii var. sanctarum (Greene) Abrams -- not accepted
  Dodecatheon clevelandii Greene -- not accepted -- padre's shootingstar
  Dodecatheon clevelandii ssp. clevelandii Greene -- not accepted -- padre's shootingstar
  Dodecatheon clevelandii ssp. sanctarum (Greene) Abrams -- not accepted -- padre's shootingstar
  Dodecatheon clevelandii var. gracile (Greene) Reveal -- not accepted -- padre's shootingstar
  Dodecatheon conjugens Greene -- not accepted -- Bonneville shootingstar
  Dodecatheon conjugens ssp. conjugens Greene -- not accepted -- Bonneville shootingstar
  Dodecatheon conjugens var. conjugens Greene -- not accepted -- Bonneville shootingstar
  Dodecatheon cusickii Greene -- not accepted
  Dodecatheon hansenii (Greene) H.J. Thomps. -- not accepted
  Dodecatheon hendersonii ssp. cruciatum (Greene) H.J. Thomps. -- not accepted -- mosquito bills
  Dodecatheon hendersonii ssp. hansenii (Greene) Kartesz -- not accepted -- mosquito bills
  Dodecatheon hendersonii var. cruciatum Greene -- not accepted
  Dodecatheon hendersonii var. hansenii Greene -- not accepted
  Dodecatheon jeffreyi var. viviparum (Greene) Abrams -- not accepted
  Dodecatheon patulum (Kuntze) Greene -- not accepted
  Dodecatheon patulum var. bernalinum Greene -- not accepted
  Dodecatheon pauciflorum Greene -- not accepted
  Dodecatheon pauciflorum var. cusickii (Greene) H. Mason ex H. St. John -- not accepted
  Dodecatheon pauciflorum var. monanthum Greene -- not accepted
  Dodecatheon pulchellum ssp. cusickii (Greene) Calder & Roy L. Taylor -- not accepted -- Cusick's shootingstar
  Dodecatheon pulchellum ssp. monanthum (Greene) H.J. Thomps. ex Munz -- not accepted -- darkthroat shootingstar
  Dodecatheon pulchellum ssp. pauciflorum (Greene) Hultén -- not accepted
  Dodecatheon pulchellum var. cusickii (Greene) Reveal -- not accepted
  Dodecatheon pulchellum var. monanthum (Greene) B. Boivin -- not accepted
  Dodecatheon radicatum Greene -- not accepted
  Dodecatheon radicatum ssp. monanthum (Greene) H.J. Thomps. -- not accepted
  Doellingeria infirma (Michx.) Greene -- accepted -- cornel-leaf whitetop
  Doellingeria reticulata (Pursh) Greene -- not accepted
  Douglasia ochotensis ssp. gormanii (Greene) Á. Löve & D. Löve -- not accepted
  Downingia concolor Greene -- accepted -- maroonspot calicoflower
  Downingia concolor var. concolor Greene -- accepted -- maroonspot calicoflower
  Downingia concolor var. tricolor (Greene) Jeps. -- not accepted -- maroonspot calicoflower
  Downingia cuspidata (Greene) Rattan -- accepted
  Downingia cuspidata (Greene) Greene ex Jeps. -- not accepted -- toothed calicoflower
  Downingia humilis (Greene) Greene -- not accepted
  Downingia insignis Greene -- accepted -- cupped downingia, harlequin calicoflower
  Downingia laeta (Greene) Greene -- accepted -- Great Basin calicoflower, Great Basin downingia
  Downingia montana Greene -- accepted -- Sierra calicoflower
  Downingia ornatissima Greene -- accepted -- folded calicoflower
  Downingia ornatissima var. ornatissima Greene -- accepted -- folded calicoflower
  Draba albertina Greene -- accepted -- Arc Dome draba, slender draba
  Draba asprella Greene -- accepted -- rough draba, rough whitlowgrass
  Draba asprella var. asprella Greene -- accepted -- rough draba, rough whitlowgrass
  Draba aurea var. neomexicana (Greene) Tidestr. -- not accepted
  Draba cuneifolia var. sonorae (Greene) Parish -- accepted -- Sonora draba, Sonoran whitlowgrass
  Draba graminea Greene -- accepted -- Rocky Mountain draba
  Draba hellerama Greene -- not accepted
  Draba helleriana Greene -- accepted -- Heller's draba, Heller's whitlowgrass
  Draba helleriana var. helleriana Greene -- not accepted -- Heller's draba
  Draba mogollonica Greene -- accepted -- Mogollon Mountain draba, Mogollon Mountain whitlowgrass
  Draba neomexicana Greene -- not accepted
  Draba nitida Greene -- not accepted
  Draba petrophila Greene -- accepted -- Santa Rita Mountain draba, Santa Rita Mountain whitlowgrass, Santa Rita whitlow grass
  Draba petrophila var. petrophila Greene -- not accepted -- Santa Rita Mountain draba, Santa Rita whitlow grass
  Draba praealta Greene -- accepted -- tall draba
  Draba sonorae Greene -- not accepted
  Draba spectabilis Greene -- accepted -- showy draba, showy whitlowgrass
  Draba spectabilis var. oxyloba (Greene) Gilg & Schulz ex O.E. Schulz -- not accepted -- showy draba
  Draba spectabilis var. spectabilis Greene -- not accepted -- showy draba, showy whitlowgrass
  Drymaria depressa Greene -- accepted -- pinewoods drymary
  Drymaria effusa var. depressa (Greene) J.A. Duke -- not accepted -- pinewoods drymary
  Drymocallis ashlandica (Greene) Rydb. -- accepted -- Ashland cinquefoil
  Drymocallis glandulosa var. reflexa (Greene) Ertter -- accepted -- sticky cinquefoil
  Drymocallis hansenii (Greene) Rydb. -- accepted -- Hansen's cinquefoil
  Drymocallis lactea (Greene) Rydb. -- accepted
  Drymocallis lactea var. lactea (Greene) Rydb. -- accepted -- Sierran drymocallis, wood beauty
  Dudleya rusbyi (Greene) Britton & Rose -- not accepted
  Duravia bidwelliae (S. Watson) Greene -- not accepted
  Echeveria rusbyi (Greene) Nelson & J.F. Macbr. -- not accepted
  Epilobium canum (Greene) P.H. Raven -- accepted -- hummingbird trumpet, hummingbird-trumpet
  Epilobium canum ssp. canum (Greene) P.H. Raven -- accepted -- hummingbird trumpet
  Epilobium oreganum Greene -- accepted -- Grants Pass willowherb, Oregon fireweed
  Eremalche Greene -- accepted -- mallow
  Eremalche exilis (A. Gray) Greene -- accepted -- white mallow, white-mallow
  Eremalche parryi (Greene) Greene -- accepted -- Parry's mallow
  Eremalche parryi ssp. parryi (Greene) Greene -- accepted -- Parry's mallow
  Eremalche rotundifolia (A. Gray) Greene -- accepted -- desert five-spot, desert fivespot
  Eremocarya micrantha (Torr.) Greene -- not accepted
  Ericameria arborescens (A. Gray) Greene -- accepted -- goldenfleece
  Ericameria humilis (Greene) L.C. Anderson -- not accepted
  Ericameria linifolia (Greene) L.C. Anderson -- not accepted
  Ericameria nauseosa ssp. consimilis (Greene) G.L. Nesom & Baird -- accepted -- rubber rabbitbrush
  Ericameria nauseosa ssp. consimilis var. juncea (Greene) G.L. Nesom & Baird -- not accepted
  Ericameria nauseosa ssp. consimilis var. mohavensis (Greene) G.L. Nesom & Baird -- not accepted
  Ericameria nauseosa var. juncea (Greene) G.L. Nesom & Baird -- accepted -- rubber rabbitbrush
  Ericameria nauseosa var. mohavensis (Greene) G.L. Nesom & Baird -- accepted -- rubber rabbitbrush
  Ericameria parishii (Greene) H.M. Hall -- accepted -- goldenbush, Parish's rabbitbrush
  Ericameria parishii var. parishii (Greene) H.M. Hall -- not accepted
  Ericameria parryi var. aspera (Greene) G.L. Nesom & Baird -- accepted -- Parry's rabbitbrush
  Ericameria parryi var. aspra (Greene) G.L. Nesom & Baird -- not accepted
  Ericameria parryi var. vulcanica (Greene) G.L. Nesom & Baird -- accepted -- Parry's rabbitbrush
  Erigeron angustatus Greene -- not accepted -- serpentine fleabane
  Erigeron aphanactis (A. Gray) Greene -- accepted -- beach daisy, rayless shaggy fleabane
  Erigeron aphanactis var. aphanactis (A. Gray) Greene -- accepted -- rayless shaggy daisy, rayless shaggy fleabane
  Erigeron aphanactis var. congestus (Greene) Cronquist -- accepted -- rayless shaggy daisy, rayless shaggy fleabane
  Erigeron arenarius Greene -- not accepted
  Erigeron aureus Greene -- accepted -- alpine yellow fleabane
  Erigeron aureus var. aureus Greene -- not accepted -- alpine yellow fleabane
  Erigeron austiniae Greene -- not accepted -- dwarf yellow daisy, sagebrush fleabane
  Erigeron barbellulatus Greene -- accepted -- shining fleabane
  Erigeron bellidiastrum var. arenarius (Greene) G.L. Nesom -- accepted -- sandwort daisy fleabane
  Erigeron biolettii Greene -- accepted -- Biolett's erigeron
  Erigeron blochmaniae Greene -- accepted -- Blochman's erigeron
  Erigeron breweri var. covillei (Greene) G.L. Nesom -- accepted -- Coville's erigeron
  Erigeron breweri var. elmeri Greene -- not accepted
  Erigeron callianthemus Greene -- not accepted
  Erigeron cervinus Greene -- accepted -- Siskiyou fleabane
  Erigeron chrysopsidis ssp. austinae (Greene) Cronquist -- not accepted
  Erigeron chrysopsidis ssp. austiniae (Greene) Cronquist -- not accepted
  Erigeron chrysopsidis var. austiniae (Greene) G.L. Nesom -- accepted -- sagebrush fleabane
  Erigeron chrysopsidis var. austiniae (Greene) Cronquist -- not accepted
  Erigeron condensatus (D.C. Eaton) Greene -- not accepted
  Erigeron controversus Greene -- not accepted
  Erigeron eatonii ssp. plantagineus (Greene) Cronquist -- not accepted
  Erigeron eatonii var. plantagineus (Greene) Cronquist -- accepted -- Eaton's daisy, Eaton's fleabane
  Erigeron eatonii var. sonnei (Greene) G.L. Nesom -- accepted -- Eaton's fleabane
  Erigeron elatior (A. Gray) Greene -- accepted -- tall fleabane
  Erigeron elatus (Hook.) Greene -- accepted -- swamp boreal-daisy
  Erigeron elegantulus Greene -- accepted -- blue dwarf fleabane
  Erigeron elmeri (Greene) Greene -- accepted -- Elmer's erigeron
  Erigeron eximius Greene -- accepted -- spruce-fir fleabane, sprucefir fleabane
  Erigeron foliosus var. blochmaniae (Greene) H.M. Hall -- not accepted
  Erigeron foliosus var. covillei (Greene) Compton -- not accepted
  Erigeron foliosus var. hartwegii (Greene) Jeps. -- accepted -- Hartweg's fleabane
  Erigeron foliosus var. mendocinus (Greene) G.L. Nesom -- accepted -- Mendocino erigeron
  Erigeron formosissimus Greene -- accepted -- beautiful fleabane
  Erigeron formosissimus var. formosissimus Greene -- not accepted -- beautiful fleabane
  Erigeron hyperboreus Greene -- accepted -- tundra fleabane
  Erigeron inornatus var. biolettii (Greene) Jeps. -- not accepted
  Erigeron jucundus Greene -- not accepted
  Erigeron lassenianus Greene -- accepted -- Mt. Lassen fleabane
  Erigeron lassenianus var. lassenianus Greene -- accepted -- Mt. Lassen fleabane
  Erigeron linearis var. elegantulus (Greene) J.T. Howell -- not accepted
  Erigeron mendocinus Greene -- not accepted
  Erigeron multiceps Greene -- accepted -- Kern River fleabane
  Erigeron nevadensis var. sonnei (Greene) Smilty -- not accepted
  Erigeron oxyphyllus Greene -- accepted -- rush daisy, wand fleabane
  Erigeron peregrinus (Banks ex Pursh) Greene -- accepted -- subalpine fleabane, wandering daisy, wandering fleabane
  Erigeron peregrinus ssp. callianthemus (Greene) Cronquist -- not accepted -- subalpine daisy, subalpine fleabane
  Erigeron peregrinus ssp. callianthemus var. callianthemus (Greene) Cronquist -- not accepted -- subalpine daisy, subalpine fleabane
  Erigeron peregrinus ssp. peregrinus (Banks ex Pursh) Greene -- accepted -- subalpine fleabane
  Erigeron peregrinus ssp. peregrinus var. dawsonii Greene -- not accepted -- subalpine fleabane
  Erigeron peregrinus ssp. peregrinus var. peregrinus (Banks ex Pursh) Greene -- not accepted -- subalpine fleabane
  Erigeron peregrinus var. callianthemus (Greene) Cronq. -- not accepted -- subalpine fleabane
  Erigeron peregrinus var. dawsonii Greene -- not accepted -- subalpine fleabane
  Erigeron peregrinus var. peregrinus (Banks ex Pursh) Greene -- accepted -- subalpine fleabane, wandering fleabane
  Erigeron petiolaris Greene -- not accepted
  Erigeron petrophilus Greene -- accepted -- rockloving erigeron
  Erigeron petrophilus var. petrophilus Greene -- accepted -- rockloving erigeron
  Erigeron platyphyllus Greene -- not accepted
  Erigeron purpuratus Greene -- accepted -- purple fleabane
  Erigeron purpuratus var. purpuratus Greene -- not accepted -- purple fleabane
  Erigeron pygmaeus (A. Gray) Greene -- accepted -- dwarf daisy, pygmy fleabane
  Erigeron simplex Greene -- not accepted -- one-stem fleabane, oneflower fleabane, onestem daisy, onestem fleabane
  Erigeron sonnei Greene -- not accepted
  Erigeron superbus Greene ex Rydb. -- not accepted
  Erigeron tracyi Greene -- accepted -- running fleabane
  Erigeron vreelandii Greene -- accepted -- broadleaf daisy, Vreeland's erigeron
  Eriocarpum australe Greene -- not accepted
  Eriocarpum coloradoense (A. Gray) Greene -- not accepted
  Eriocarpum scabrellum Greene -- not accepted
  Eriocarpum spinulosum (Pursh) Greene -- not accepted
  Eriocarpum wootonii Greene -- not accepted
  Eriogonum abertianum var. cyclosepalum (Greene) Fosberg -- not accepted -- Abert's buckwheat
  Eriogonum anemophilum Greene -- accepted -- west Humboldt buckwheat, windloving buckwheat
  Eriogonum arborescens Greene -- accepted -- Santa Cruz Island buckwheat
  Eriogonum arcuatum Greene -- accepted
  Eriogonum arcuatum var. arcuatum Greene -- accepted -- Baker's buckwheat
  Eriogonum baileyi ssp. elegans (Greene) Munz -- not accepted
  Eriogonum bakeri Greene -- not accepted
  Eriogonum caninum (Greene) Munz -- not accepted -- Tiburon wild buckwheat
  Eriogonum cithariforme var. agninum (Greene) Reveal -- accepted -- Cithara buckwheat
  Eriogonum cognatum Greene -- not accepted
  Eriogonum commixtum Greene ex Tidestr. -- not accepted
  Eriogonum cyclosepalum Greene -- not accepted
  Eriogonum davidsonii Greene -- accepted -- Davidson's buckwheat, Davidson's wild buckwheat
  Eriogonum densum Greene -- not accepted
  Eriogonum elegans Greene -- accepted -- elegant buckwheat
  Eriogonum flavum ssp. piperi (Greene) S. Stokes -- not accepted
  Eriogonum flavum var. piperi (Greene) M.E. Jones -- accepted -- Piper's eriogonum, Piper's golden buckwheat
  Eriogonum grande Greene -- accepted -- redflower buckwheat
  Eriogonum grande ssp. rubescens (Greene) Munz -- not accepted
  Eriogonum grande var. grande Greene -- accepted -- redflower buckwheat
  Eriogonum grande var. rubescens (Greene) Munz -- accepted -- large red buckwheat, redflower buckwheat
  Eriogonum heracleoides var. subalpinum (Greene) S. Stokes -- not accepted
  Eriogonum latifolium ssp. deductum (Greene) S. Stokes -- not accepted
  Eriogonum latifolium ssp. grande (Greene) S. Stokes -- not accepted
  Eriogonum latifolium ssp. sulphureum (Greene) S. Stokes -- not accepted
  Eriogonum latifolium var. deductum (Greene) S. Stokes -- not accepted
  Eriogonum latifolium var. rubescens (Greene) Munz -- not accepted
  Eriogonum lobbii var. robustum (Greene) M.E. Jones -- not accepted -- granite buckwheat
  Eriogonum luteolum Greene -- accepted -- goldencarpet buckwheat
  Eriogonum luteolum var. caninum (Greene) Reveal -- accepted -- Tiburon buckwheat
  Eriogonum luteolum var. luteolum Greene -- accepted -- goldencarpet buckwheat
  Eriogonum molestum var. davidsonii (Greene) Jeps. -- not accepted
  Eriogonum molle Greene -- accepted
  Eriogonum nortonii Greene -- accepted -- Pinnacles buckwheat, Pinnacles wild buckwheat
  Eriogonum nudum var. deductum (Greene) Jeps. -- accepted -- naked buckwheat
  Eriogonum ochrocephalum ssp. anemophilum (Greene) S. Stokes -- not accepted
  Eriogonum piperi Greene -- not accepted
  Eriogonum proliferum ssp. anserinum (Greene) Munz -- not accepted
  Eriogonum robustum Greene -- accepted -- altered-andesite buckwheat, granite buckwheat
  Eriogonum rubescens Greene -- not accepted
  Eriogonum salicinum Greene -- not accepted
  Eriogonum sphaerocephalum var. sericoleucum (Greene) S. Stokes -- not accepted
  Eriogonum strictum ssp. proliferum var. anserinum (Greene) S. Stokes -- not accepted -- Blue Mountain buckwheat
  Eriogonum strictum var. anserinum (Greene) S. Stokes -- accepted -- Blue Mountain buckwheat
  Eriogonum subalpinum Greene -- not accepted
  Eriogonum tripodum Greene -- accepted -- tripod buckwheat
  Eriogonum umbellatum ssp. aridum (Greene) S. Stokes -- not accepted
  Eriogonum umbellatum ssp. dumosum (Greene) S. Stokes -- not accepted
  Eriogonum umbellatum var. aridum (Greene) C.L. Hitchc. -- not accepted
  Eriogonum umbellatum var. cognatum (Greene) Reveal -- accepted -- sulphur-flower buckwheat, sulphur-flower wild buckwheat
  Eriogonum umbellatum var. dumosum (Greene) Reveal -- accepted -- American Valley sulphur-flower buckwheat
  Eriogonum umbellatum var. modocense (Greene) S. Stokes -- accepted -- sulphur-flower buckwheat
  Eriogonum umbellatum var. subalpinum (Greene) M.E. Jones -- not accepted
  Eriogonum vimineum var. caninum Greene -- not accepted
  Eriogonum vimineum var. commixtum (Greene ex Tidestr.) S. Stokes -- not accepted
  Eriogonum vimineum var. densum (Greene) S. Stokes -- not accepted
  Eriogonum vimineum var. luteolum (Greene) S. Stokes -- not accepted
  Eriophyllum confertiflorum var. tanacetiflorum (Greene) Jeps. -- accepted -- golden-yarrow
  Eriophyllum integrifolium (Hook.) Greene -- not accepted
  Eriophyllum jepsonii Greene -- accepted -- Jepson's woolly sunflower
  Eriophyllum lanatum var. croceum (Greene) Jeps. -- accepted -- common woolly sunflower
  Eriophyllum lanatum var. obovatum (Greene) H.M. Hall -- accepted -- common woolly sunflower
  Eriophyllum nubigenum Greene ex A. Gray -- accepted -- Yosemite woolly sunflower
  Eriophyllum staechadifolium var. depressum Greene -- not accepted
  Eriophyllum stoechadifolium var. depressum Greene -- not accepted
  Eriophyllum tanacetiflorum Greene -- not accepted
  Ermania borealis (Greene) Hultén -- not accepted
  Erodium macrophyllum var. californicum (Greene) Jeps. -- accepted -- California stork's bill
  Eryngium alismifolium Greene -- accepted -- Modoc eryngo
  Erysimum amoenum (Greene) Rydb. -- not accepted
  Erysimum angustatum Greene -- not accepted
  Erysimum argillosum (Greene) Rydb. -- not accepted
  Erysimum asperrimum (Greene) Rydb. -- not accepted
  Erysimum asperum var. amoenum (Greene) Reveal -- not accepted
  Erysimum capitatum (Douglas ex Hook.) Greene -- accepted -- coast wallflower, sand dune wallflower, western wallflower
  Erysimum capitatum ssp. angustatum (Greene) R.A. Price -- not accepted -- Contra Costa wallflower
  Erysimum capitatum var. amoenum (Greene) R.J. Davis -- not accepted
  Erysimum capitatum var. angustatum (Greene) Rossbach -- not accepted -- Contra Costa wallflower, sand dune wallflower
  Erysimum capitatum var. argillosum (Greene) R.J. Davis -- not accepted -- sand dune wallflower
  Erysimum capitatum var. capitatum (Douglas ex Hook.) Greene -- accepted -- plains wallflower, prairie rocket, sand dune wallflower, western wallflower
  Erysimum capitatum var. nivale (Greene) N.H. Holmgren -- not accepted
  Erysimum insulare Greene -- accepted -- island wallflower
  Erysimum insulare ssp. insulare Greene -- not accepted -- island wallflower
  Erysimum nivale (Greene) Rydb. -- not accepted
  Erythrocoma campanulata Greene -- not accepted
  Erythrocoma canescens Greene -- not accepted
  Erythrocoma ciliata (Pursh) Greene -- not accepted
  Erythrocoma triflora (Pursh) Greene -- not accepted
  Eschscholzia californica ssp. mexicana (Greene) C. Clark -- accepted -- California poppy, Mexican goldenpoppy, Mexican goldpoppy
  Eschscholzia californica var. maritima (Greene) Jeps. -- not accepted
  Eschscholzia californica var. peninsularis (Greene) Munz -- not accepted
  Eschscholzia covillei Greene -- not accepted
  Eschscholzia elegans Greene -- not accepted
  Eschscholzia frutescens (Greene) J.T. Howell -- not accepted
  Eschscholzia glyptosperma Greene -- accepted -- desert goldenpoppy, desert poppy
  Eschscholzia lemmonii Greene -- accepted -- Lemmon's poppy
  Eschscholzia lemmonii ssp. lemmonii Greene -- accepted -- Lemmon's poppy
  Eschscholzia lemmonii var. asprella (Greene) Jeps. -- not accepted
  Eschscholzia lemmonii var. laxa Greene -- not accepted
  Eschscholzia lobbii Greene -- accepted -- fryingpans
  Eschscholzia mexicana Greene -- not accepted
  Eschscholzia minutiflora ssp. covillei (Greene) C. Clark -- accepted -- Coville's goldenpoppy, Coville's poppy
  Eschscholzia parishii Greene -- accepted -- Parish's poppy
  Eschscholzia procera Greene -- not accepted -- Kernville goldenpoppy, Kernville poppy
  Eschscholzia ramosa Greene -- accepted -- Channel Island poppy, island poppy
  Eschscholzia rhombipetala Greene -- accepted -- diamond-petaled poppy, diamondpetal California poppy
  Eucephalus brickellioides (Greene) G.L. Nesom -- not accepted -- brickellbush aster
  Eucephalus covillei Greene -- not accepted
  Eucephalus engelmannii (D.C. Eaton) Greene -- accepted -- Engelmann's aster
  Eucephalus formosus Greene -- not accepted
  Eucephalus glabratus (Greene) Greene -- accepted -- smooth aster
  Eucephalus glaucescens (A. Gray) Greene -- accepted -- Klickitat aster
  Eucephalus ledophyllus (A. Gray) Greene -- accepted -- Cascade aster
  Eucephalus ledophyllus var. covillei (Greene) G.L. Nesom -- accepted -- Cascade aster
  Eucephalus ledophyllus var. ledophyllus (A. Gray) Greene -- accepted -- Cascade aster
  Eucephalus paucicapitatus (B.L. Rob.) Greene -- accepted -- Olympic Mountain aster
  Eucephalus tomentellus (Greene) Greene -- accepted -- rayless aster
  Eucrypta chrysanthemifolia (Benth.) Greene -- accepted -- common eucrypta, spotted hideseed
  Eucrypta chrysanthemifolia var. chrysanthemifolia (Benth.) Greene -- accepted -- spotted hideseed
  Eunanus angustatus (A. Gray) Greene -- not accepted
  Eunanus angustifolius Greene -- not accepted
  Eunanus austiniae Greene -- not accepted
  Eunanus bolanderi (A. Gray) Greene -- not accepted
  Eunanus brevipes (Benth.) Greene -- not accepted
  Eunanus breweri Greene -- not accepted
  Eunanus congdonii (B.L. Rob.) Greene -- not accepted
  Eunanus cusickii Greene -- not accepted
  Eunanus douglasii var. parviflorus Greene -- not accepted
  Eunanus kelloggii Curran ex Greene -- not accepted
  Eunanus kelloggii var. parviflorus (Greene) Jeps. -- not accepted
  Eunanus layneae Greene -- not accepted
  Eunanus leptaleus (A. Gray) Greene -- not accepted
  Eunanus mephiticus (Greene) Greene -- not accepted
  Eunanus mohavensis (Lemmon) Greene -- not accepted
  Eunanus pictus Curran ex Greene -- not accepted
  Eunanus pulchellus Drew ex Greene -- not accepted
  Eunanus rattanii (A. Gray) Greene -- not accepted
  Eunanus subsecundus (A. Gray) Greene -- not accepted
  Eunanus subuniflorus (Hook. & Arn.) Greene -- not accepted
  Eunanus torreyi (A. Gray) Greene -- not accepted
  Eunanus tricolor (Hartw. ex Lindl.) Greene -- not accepted
  Eupatorium herbaceum (A. Gray) Greene -- not accepted
  Eupatorium juncundum Greene -- not accepted
  Eupatorium lecheifolium Greene -- not accepted
  Eupatorium mohrii Greene -- accepted -- Mohr's thoroughwort
  Eupatorium smithii Greene & C. Mohr -- not accepted
  Euphorbia bartolomaei Greene -- accepted
  Euphorbia benedicta Greene -- not accepted
  Euphorbia marilandica Greene -- not accepted
  Euphorbia neomexicana Greene -- not accepted
  Euphorbia parishii Greene -- accepted -- Parish's sandmat
  Euphorbia polycarpa var. parishii (Greene) Jeps. -- not accepted
  Euphorbia rafinesquei Greene -- not accepted
  Euphorbia rugulosa (Engelm. ex Millsp.) Greene -- not accepted
  Euphorbia rusbyi Greene -- not accepted
  Euphorbia velutina Greene -- not accepted
  Euphorbia versicolor Greene -- not accepted
  Euploca convolvulacea ssp. californica (Greene) Abrams -- accepted -- phlox heliotrope
  Euthamia camporum Greene -- not accepted
  Euthamia caroliniana (L.) Greene ex Porter & Britton -- not accepted
  Euthamia chrysothamnoides Greene -- not accepted
  Euthamia floribunda Greene -- not accepted
  Euthamia galetorum Greene -- not accepted
  Euthamia graminifolia var. galetorum (Greene) Friesner -- not accepted
  Euthamia graminifolia var. nuttallii (Greene) W. Stone -- not accepted -- flat-top goldentop
  Euthamia gymnospermoides Greene -- accepted -- Texas goldentop
  Euthamia leptocephala (Torr. & A. Gray) Greene ex Porter & Britton -- accepted -- bushy goldentop
  Euthamia media Greene -- not accepted
  Euthamia microcephala Greene -- not accepted
  Euthamia microphylla Greene -- not accepted
  Euthamia minor (Michx.) Greene -- not accepted
  Euthamia nuttallii Greene -- not accepted
  Euthamia pulverulenta Greene -- not accepted
  Euthamia remota Greene -- not accepted
  Evax acaulis (Kellogg) Greene -- not accepted
  Evax acaulis Greene non (Kellogg) Greene -- not accepted
  Evax caulescens var. humilis (Greene) Jeps. -- not accepted
  Evax involucrata Greene -- not accepted
  Fendlerella (Greene) A. Heller -- accepted -- fendlerbush
  Fendlerella utahensis var. cymosa (Greene ex Wooton & Standl.) Kearney & Peebles -- not accepted -- Arizona fendlerella, Utah fendlerbush
  Floerkea versicolor Greene -- not accepted
  Forsellesia Greene -- not accepted
  Forsellesia nevadensis (A. Gray) Greene -- not accepted
  Forsellesia spinescens (A. Gray) Greene -- not accepted
  Frangula betulifolia (Greene) Grubov -- not accepted -- beechleaf buckthorn, beechleaf frangula
  Frangula betulifolia ssp. betulifolia (Greene) Grubov -- not accepted -- beechleaf frangula, birchleaf buckthorn
  Frangula californica ssp. cuspidata (Greene) Kartesz & Gandhi -- not accepted -- California buckthorn
  Frangula californica ssp. ursina (Greene) Kartesz & Gandhi -- not accepted -- California buckthorn
  Frangula purshiana ssp. annonifolia (Greene) Sawyer & S.W. Edwards -- not accepted -- Cascara buckthorn, Pursh's buckthorn
  Frangula rubra (Greene) Grubov -- not accepted -- red buckthorn
  Frangula rubra ssp. obtusissima (Greene) Kartesz & Gandhi -- not accepted -- obtuse buckthorn
  Frangula rubra ssp. rubra (Greene) Grubov -- not accepted -- red buckthorn
  Frangula X blumeri (Greene) Kartesz & Gandhi (pro. sp.) -- not accepted -- Blumer's buckthorn
  Frasera macrophylla Greene -- not accepted
  Fritillaria agrestis Greene -- accepted -- stink bells, stinkbells
  Fritillaria coccinea (Greene) Greene -- not accepted
  Fritillaria glauca Greene -- accepted -- Siskiyou fritillary
  Fritillaria recurva var. coccinea Greene -- not accepted
  Gaillardia fastigiata Greene -- not accepted
  Gaillardia lanceolata var. fastigiata (Greene) Waterf. -- not accepted
  Gaillardia lutea Greene -- not accepted
  Gaillardia multiceps Greene -- accepted -- onion blanketflower
  Gaillardia multiceps var. multiceps Greene -- not accepted -- onion blanketflower
  Gaillardia parryi Greene -- accepted -- Parry's blanketflower
  Galium buxifolium Greene -- accepted -- box bedstraw, island bedstraw
  Galium californicum ssp. flaccidum (Greene) Dempster & Stebbins -- accepted -- California bedstraw
  Galium californicum ssp. miguelense (Greene) Dempster & Stebbins -- accepted -- San Miguel Island bedstraw
  Galium californicum var. miguelense (Greene) Jeps. -- not accepted
  Galium catalinense var. buxifolium (Greene) Dempster -- not accepted
  Galium culbertsonii Greene -- not accepted
  Galium flaccidum Greene -- not accepted
  Galium miguelense Greene -- not accepted
  Gayophytum lasiospermum Greene -- not accepted
  Gentiana interrupta Greene -- not accepted
  Gentiana rusbyi Greene -- not accepted
  Gentiana scopulorum (Greene) Tidestr. -- not accepted
  Gentianella detonsa ssp. superba (Greene) J.M. Gillett -- not accepted
  Gerardia decemloba Greene -- not accepted
  Gerardia neoscotica Greene -- not accepted
  Gerardia purpurea var. neoscotica (Greene) Gleason -- not accepted
  Geum campanulatum (Greene) G.N. Jones -- not accepted
  Geum canescens (Greene) Munz -- not accepted
  Geum ciliatum var. griseum (Greene) Kearney & Peebles -- not accepted
  Geum rossii var. depressum (Greene) C.L. Hitchc. -- not accepted -- Ross' avens
  Geum triflorum var. campanulatum (Greene) C.L. Hitchc. -- not accepted -- old man's whiskers
  Geum triflorum var. canescens (Greene) Kartesz & Gandhi -- not accepted -- alpine old man's whiskers, old man's whiskers, old-man's-whiskers
  Gilia achilleifolia ssp. chamissonis (Greene) Brand -- not accepted
  Gilia achilleifolia ssp. staminea (Greene) H. Mason & A.D. Grant -- not accepted
  Gilia achilleifolia var. chamissonis (Greene) A. Nelson & J.F. Macbr. -- not accepted
  Gilia aggregata ssp. formosissima (Greene) Wherry -- not accepted
  Gilia aggregata var. arizonica (Greene) Fosberg -- not accepted
  Gilia arizonica (Greene) Rydb. -- not accepted
  Gilia candida ssp. collina (Greene) Wherry -- not accepted
  Gilia capitata ssp. abrotanifolia (Nutt. ex Greene) V.E. Grant -- accepted -- bluehead gilia
  Gilia capitata ssp. chamissonis (Greene) V.E. Grant -- accepted -- bluehead gilia
  Gilia capitata ssp. staminea (Greene) V.E. Grant -- accepted -- bluehead gilia
  Gilia formosa Greene ex Brand -- not accepted -- Aztec gilia, beautiful gilia
  Gilia gilioides (Benth.) Greene -- not accepted
  Gilia leptalea (A. Gray) Greene -- not accepted -- Bridges' gilia
  Gilia leptalea ssp. leptalea (A. Gray) Greene -- not accepted -- Bridges' gilia
  Gilia texana (Greene) Wooton & Standl. -- not accepted
  Gnaphalium chilense var. confertifolium Greene -- not accepted
  Gnaphalium macounii Greene -- not accepted
  Graptopetalum rusbyi (Greene) Rose -- accepted -- San Francisco leather petal, San Francisco River leatherpetal
  Grindelia camporum Greene -- not accepted -- Great Valley gumweed
  Grindelia camporum var. camporum Greene -- not accepted -- Great Valley gumweed
  Grindelia decumbens Greene -- accepted -- reclined gumweed
  Grindelia decumbens var. decumbens Greene -- not accepted -- reclined gumweed
  Grindelia decumbens var. subincisa (Greene) Steyerm. -- not accepted -- reclined gumweed
  Grindelia fastigiata Greene -- not accepted -- pointed gumweed
  Grindelia hirsutula var. maritima (Greene) M.A. Lane -- not accepted -- coastal gumweed
  Grindelia inornata Greene -- not accepted -- Colorado gumweed
  Grindelia inornata var. inornata Greene -- not accepted -- Colorado gumweed
  Grindelia integrifolia var. macrophylla (Greene) Cronquist -- not accepted
  Grindelia latifolia ssp. platyphylla (Greene) D.D. Keck -- not accepted
  Grindelia latifolia var. platyphylla Greene -- not accepted
  Grindelia maritima (Greene) Steyerm. -- not accepted
  Grindelia oxylepis Greene -- accepted -- Mexican gumweed
  Grindelia paludosa Greene -- not accepted
  Grindelia procera Greene -- not accepted
  Grindelia scabra Greene -- accepted -- rough gumweed
  Grindelia stricta var. platyphylla (Greene) M.A. Lane -- not accepted -- Oregon gumweed
  Grindelia subalpina Greene -- accepted -- subalpine gumweed
  Grindelia subalpina var. subalpina Greene -- not accepted -- subalpine gumweed
  Grossularia cognata (Greene) Coville & Britton -- not accepted
  Grossularia cruenta (Greene) Coville & Britton -- not accepted
  Grossularia lasiantha (Greene) Coville & Britton -- not accepted
  Grossularia marshallii (Greene) Coville & Britton -- not accepted
  Grossularia quercetora (Greene) Coville & Britton -- not accepted
  Grossularia quercetorum (Greene) Coville & Britton -- not accepted
  Grossularia velutina (Greene) Coville & Britton -- not accepted
  Grossularia victoris (Greene) Coville & Britton -- not accepted
  Guillenia Greene -- not accepted -- guillenia, mustard
  Guillenia flavescens (Hook.) Greene -- not accepted -- yellow mustard
  Guillenia lasiophylla (Hook. & Arn.) Greene -- not accepted -- California mustard, coast wild cabbage, hairyleaf wildcabbage
  Guillenia lemmonii (Greene) R.E. Buck -- not accepted -- Lemmon's mustard, Lemmon's wild cabbage
  Gutierrezia diversifolia Greene -- not accepted
  Gutierrezia glomerella Greene -- not accepted
  Gutierrezia lepidota Greene -- not accepted
  Gutierrezia linoides Greene -- not accepted
  Gutierrezia lucida (Greene) Greene -- not accepted
  Gutierrezia serotina Greene -- accepted -- late snakeweed
  Gutierrezia tenuis Greene -- not accepted
  Gymnosteris Greene -- accepted
  Gymnosteris nudicaulis (Hook. & Arn.) Greene -- accepted -- nakedstem gymnosteris
  Gymnosteris nudicaulis var. pulchella (Greene) Brand -- not accepted
  Habenaria elegans var. maritima (Greene) Ames -- not accepted
  Habenaria maritima Greene -- not accepted
  Habenaria michaelii Greene -- not accepted
  Habenaria saccata Greene -- not accepted
  Habenaria sparsiflora var. brevifolia (Greene) Correll -- not accepted
  Habenaria unalascensis var. maritima (Greene) Correll -- not accepted
  Hackelia pinetorum (Greene ex A. Gray) I.M. Johnst. -- accepted -- Livermore stickseed
  Hackelia pinetorum var. pinetorum (Greene ex A. Gray) I.M. Johnst. -- accepted -- Livermore stickseed
  Hackelia ursina (Greene ex A. Gray) I.M. Johnst. -- accepted -- Chihuahuan stickseed
  Hackelia ursina var. ursina (Greene ex A. Gray) I.M. Johnst. -- accepted -- Chihuahuan stickseed
  Halerpestes cymbalaria (Pursh) Greene -- not accepted
  Haplopappus acradenius (Greene) S.F. Blake -- not accepted
  Haplopappus acradenius ssp. bracteosus (Greene) H.M. Hall -- not accepted
  Haplopappus acradenius ssp. eremophilus (Greene) H.M. Hall -- not accepted
  Haplopappus acradenius var. acradenius (Greene) Blake -- not accepted
  Haplopappus bloomeri var. sonnei (A. Gray) Greene -- not accepted
  Haplopappus carthamoides var. subsquarrosus (Greene) Dorn -- not accepted
  Haplopappus croceus var. genuflexus (Greene) S.F. Blake -- not accepted
  Haplopappus detonsus (Greene) P.H. Raven -- not accepted
  Haplopappus fremontii (A. Gray) Greene -- not accepted
  Haplopappus hirtus ssp. lanulosus (Greene) H.M. Hall -- not accepted
  Haplopappus hirtus ssp. sonchifolius (Greene) H.M. Hall -- not accepted
  Haplopappus hirtus var. lanulosus (Greene) M. Peck -- not accepted
  Haplopappus hirtus var. sonchifolius (Greene) M. Peck -- not accepted
  Haplopappus integrifolius ssp. liatriformis (Greene) H.M. Hall -- not accepted
  Haplopappus integrifolius ssp. scaberulus (Greene) H.M. Hall -- not accepted
  Haplopappus junceus Greene -- not accepted
  Haplopappus lanceolatus ssp. solidagineus (Greene) H.M. Hall -- not accepted
  Haplopappus lanulosus (Greene) M. Peck -- not accepted
  Haplopappus liatriformis (Greene) H. St. John -- not accepted
  Haplopappus parishii (Greene) S.F. Blake -- not accepted
  Haplopappus racemosus ssp. congestus (Greene) H.M. Hall -- not accepted
  Haplopappus racemosus ssp. duriuscula (Greene) H.M. Hall -- not accepted
  Haplopappus racemosus ssp. halophilus (Greene) H.M. Hall -- not accepted
  Haplopappus racemosus ssp. liatriformis (Greene) D.D. Keck -- not accepted
  Haplopappus racemosus ssp. prionophyllus (Greene) H.M. Hall -- not accepted
  Haplopappus racemosus ssp. sessiliflorus (Greene) H.M. Hall -- not accepted
  Haplopappus racemosus var. prionophyllus (Greene) S.L. Welsh -- not accepted
  Haplopappus racemosus var. sessiliflorus (Greene) S.L. Welsh -- not accepted
  Haplopappus rusbyi (Greene) Cronquist -- not accepted
  Haplopappus spinulosus ssp. australis (Greene) H.M. Hall -- not accepted
  Haplopappus spinulosus ssp. scabrellus (Greene) H.M. Hall -- not accepted
  Haplopappus spinulosus var. scabrellus (Greene) S.F. Blake -- not accepted
  Haplopappus squarrosus ssp. obtusus (Greene) H.M. Hall -- not accepted
  Haplopappus subviscosus (Greene) S.F. Blake -- not accepted
  Haplopappus tenuisectus (Greene) S.F. Blake -- not accepted
  Haplopappus uniflorus ssp. gossypinus (Greene) H.M. Hall -- not accepted
  Haplopappus venetus ssp. furfuraceus (Greene) H.M. Hall -- not accepted
  Haplopappus venetus ssp. oxyphyllus (Greene) H.M. Hall -- not accepted
  Haplopappus venetus var. argutus (Greene) D.D. Keck -- not accepted
  Haplopappus venetus var. sedoides (Greene) Munz -- not accepted
  Harmonia nutans (Greene) B.G. Baldw. -- accepted -- nodding madia
  Hazardia Greene -- accepted -- bristleweed, hazardia
  Hazardia cana (A. Gray) Greene -- accepted -- island hazardia
  Hazardia detonsa (Greene) Greene -- accepted -- island bristleweed
  Hazardia orcuttii (A. Gray) Greene -- accepted -- Orcutt's bristleweed, Orcutt's hazardia
  Hazardia squarrosa (Hook. & Arn.) Greene -- accepted -- sawtooth goldenbush
  Hazardia squarrosa var. obtusa (Greene) Jeps. -- accepted -- sawtooth bristleweed
  Hazardia squarrosa var. squarrosa (Hook. & Arn.) Greene -- accepted -- sawtooth goldenbush
  Hazardia whitneyi (A. Gray) Greene -- accepted -- Whitney's bristleweed
  Hazardia whitneyi var. whitneyi (A. Gray) Greene -- accepted -- Whitney's bristleweed
  Hedeoma blepharodonta Greene -- not accepted
  Hedeoma costata var. pulchella (Greene) Irving -- accepted -- false pennyroyal, falsepennyroyal, ribbed false pennyroyal
  Hedeoma costatum var. puchellum (Greene) Irving -- not accepted
  Hedeoma diffusa Greene -- accepted -- spreading false pennyroyal
  Hedeoma diffusum Greene -- not accepted -- Flagstaff pennyroyal
  Hedeoma pulchella Greene -- not accepted
  Hedysarum occidentale Greene -- accepted -- western sweetvetch
  Hedysarum occidentale var. occidentale Greene -- accepted -- western sweetvetch
  Helenium badium (A. Gray ex S. Watson) Greene -- not accepted
  Helenium rivulare (Greene) Rydb. -- not accepted
  Helianthella californica ssp. nevadensis (Greene) W.A. Weber -- accepted -- Nevada helianthella
  Helianthella californica var. nevadensis (Greene) Jeps. -- not accepted -- Nevada helianthella
  Helianthella castanea Greene -- accepted -- Mt. Diablo helianthella
  Helianthemum aldersonii Greene -- not accepted
  Helianthemum scoparium var. aldersonii (Greene) Munz -- not accepted
  Helianthus fascicularis Greene -- not accepted
  Heliomeris multiflora var. brevifolia (Greene ex Woot. & Standl.) Yates -- accepted -- showy goldeneye
  Heliotropium californicum Greene -- not accepted
  Heliotropium convolvulaceum var. californicum (Greene) I.M. Johnst. -- not accepted -- phlox heliotrope
  Hemitomes pumilum Greene -- not accepted
  Hemizonia cleavelandii Greene -- not accepted
  Hemizonia clevelandii Greene -- not accepted
  Hemizonia congesta ssp. clevelandii (Greene) Babc. & H.M. Hall -- accepted -- hayfield tarweed
  Hemizonia congesta ssp. lutescens (Greene) Babc. & H.M. Hall -- accepted -- hayfield tarweed
  Hemizonia hispida Greene -- not accepted
  Hemizonia kelloggii Greene -- not accepted -- Kellogg's tarweed
  Hemizonia lobbii Greene -- not accepted -- threeray tarweed
  Hemizonia lutescens (Greene) D.D. Keck -- not accepted
  Hemizonia luzulifolia var. lutescens Greene -- not accepted
  Hemizonia oppositifolia Greene -- not accepted
  Hemizonia parryi Greene -- not accepted -- pappose tarweed
  Hemizonia parryi ssp. parryi Greene -- not accepted -- pappose tarweed
  Hemizonia parryi ssp. rudis (Greene) D.D. Keck -- not accepted -- pappose tarweed
  Hemizonia pugens var. maritima (Greene) D.D. Keck -- not accepted
  Hemizonia pungens ssp. maritima (Greene) D.D. Keck -- not accepted -- common tarweed, spikeweed
  Hemizonia spicata Greene -- not accepted
  Hesperevax acaulis (Kellogg) Greene -- accepted -- stemless dwarf-cudweed
  Hesperevax acaulis var. acaulis (Kellogg) Greene -- accepted -- stemless dwarf-cudweed
  Hesperevax sparsiflora (A. Gray) Greene -- accepted -- erect dwarf-cudweed
  Hesperevax sparsiflora var. sparsiflora (A. Gray) Greene -- accepted -- erect dwarf-cudweed
  Hesperhodos minutifolia ssp. mirifica (Greene) Hurst -- not accepted
  Hesperhodos mirificus (Greene) Boulenger -- not accepted
  Hesperochiron californicus var. incanus (Greene) Brand -- not accepted
  Hesperochiron californicus var. watsonianus (Greene) Brand -- not accepted
  Hesperochiron lasianthus (Greene) H. St. John -- not accepted
  Hesperochiron villosulus (Greene) Suksd. -- not accepted
  Hesperodoria Greene -- accepted -- glowweed, hesperodoria
  Hesperodoria hallii (A. Gray) Greene -- not accepted
  Hesperodoria scopulorum (M.E. Jones) Greene -- not accepted -- Grand Canyon glow-weed, Grand Canyon glowweed
  Hesperolinon clevelandii (Greene) Small -- accepted -- Allen Springs dwarf-flax
  Hesperomecon Greene -- accepted
  Hesperomecon linearis (Benth.) Greene -- accepted -- narrowleaf queen poppy
  Hesperonia aspera (Greene) Standl. -- not accepted
  Hesperoscordum lilacinum (Greene) A. Heller ex Abrams -- not accepted
  Heterodraba Greene -- not accepted -- heterodraba
  Heterodraba unilateralis (M.E. Jones) Greene -- not accepted -- ladiestongue mustard
  Heterotheca camphorum (Greene) Shinners -- not accepted
  Heterotheca camporum (Greene) Shinners -- accepted -- lemonyellow false goldenaster
  Heterotheca camporum var. camporum (Greene) Shinners -- accepted -- lemonyellow false goldenaster
  Heterotheca fastigata (Greene) V. L. Harms -- not accepted
  Heterotheca fastigiata (Greene) V.L. Harms -- not accepted
  Heterotheca fulcrata (Greene) Shinners -- accepted -- mountain camphorweed, rockyscree false goldenaster, rockyscree falsegoldenaster
  Heterotheca fulcrata var. fulcrata (Greene) Shinners -- accepted -- rocky false goldenaster, rockyscree false goldenaster, rockyscree falsegoldenaster
  Heterotheca oregona var. rudis (Greene) Semple -- accepted -- Oregon false goldenaster
  Heterotheca pumila (Greene) Semple -- accepted -- alpine false goldenaster
  Heterotheca sessiliflora ssp. fastigiata (Greene) Semple -- accepted -- sessileflower false goldenaster
  Heterotheca sessiliflora ssp. fastigiata var. fastigiata (Greene) Semple -- not accepted
  Heterotheca sessiliflora var. fastigiata (Greene) Semple -- not accepted -- sessileflower false goldenaster
  Heterotheca villosa var. camporum (Greene) Wunderlin -- not accepted
  Heterotheca villosa var. pedunculata (Greene) V.L. Harms ex Semple -- accepted -- hairy false goldenaster
  Heuchera leptomeria Greene -- not accepted
  Heuchera maxima Greene -- accepted -- island alumroot, Jill of the rocks
  Heuchera rubescens var. pachypoda (Greene) Rosend., Butters & Lakela -- not accepted
  Heuchera rubescens var. versicolor (Greene) M.G. Stewart -- not accepted -- pink alumroot, versicolor alumroot
  Heuchera versicolor Greene -- not accepted
  Heuchera versicolor var. leptomeria (Greene) Kearney & Peebles -- not accepted
  Hibiscus opulifolius Greene -- not accepted
  Hibiscus pinetorum Greene -- not accepted
  Hibiscus platanoides Greene -- not accepted
  Hieracium brevipilum Greene -- accepted -- Mogollon hawkweed
  Hieracium carneum Greene -- accepted -- Huachuca hawkweed
  Hieracium rusbyi Greene -- not accepted -- Rusby's hawkweed
  Hieracium traillii Greene -- accepted -- Maryland hawkweed
  Hoita villosa Greene -- not accepted
  Holmgrenia hilgardii (Greene) W.L. Wagner & Hoch -- not accepted -- Hilgard's suncup
  Holocarpha Greene -- accepted -- tarweed
  Holocarpha heermannii (Greene) D.D. Keck -- accepted -- Heermann's tarweed
  Holocarpha macradenia (DC.) Greene -- accepted -- Santa Cruz tarplant
  Holozonia Greene -- accepted -- holozonia
  Holozonia filipes (Hook. & Arn.) Greene -- accepted -- whitecrown
  Hookera filifolia (S. Watson) Greene -- not accepted
  Hookera leptandra Greene -- not accepted
  Hookera orcuttii Greene -- not accepted
  Hookera rosea Greene -- not accepted
  Hookera stellaris (S. Watson) Greene -- not accepted
  Hookeria filifolia (S. Watson) Greene -- not accepted
  Hookeria leptandra Greene -- not accepted
  Hookeria orcuttii Greene -- not accepted
  Hookeria rosea Greene -- not accepted
  Hookeria stellaris (S. Wats.) Greene -- not accepted
  Horkelia bolanderi ssp. clevelandii (Greene) D.D. Keck -- not accepted
  Horkelia californica ssp. frondosa (Greene) Ertter -- not accepted -- California horkelia
  Horkelia californica var. elata (Greene) Ertter & Reveal -- accepted -- California horkelia
  Horkelia californica var. frondosa (Greene) Ertter & Reveal -- accepted -- California horkelia
  Horkelia clevelandii (Greene) Rydb. -- accepted -- Cleveland's horkelia
  Horkelia clevelandii var. clevelandii (Greene) Rydb. -- accepted -- Cleveland's horkelia
  Horkelia daucifolia (Greene) Rydb. -- accepted -- carrotleaf horkelia
  Horkelia daucifolia ssp. daucifolia (Greene) Rydb. -- not accepted -- carrotleaf horkelia
  Horkelia daucifolia var. daucifolia (Greene) Rydb. -- accepted -- carrotleaf horkelia
  Horkelia elata (Greene) Rydb. -- not accepted
  Horkelia frondosa (Greene) Rydb. -- not accepted
  Horkelia howellii (Greene) Rydb. -- accepted
  Horkelia kelloggii Greene -- not accepted
  Horkelia parryi Greene -- accepted -- Parry's horkelia
  Hosackia argyraea Greene -- not accepted
  Hosackia cuprea (Greene) Smiley -- not accepted
  Hosackia dendroidea (Greene) Abrams -- not accepted
  Hosackia humilis (Greene) Abrams -- not accepted
  Hosackia leucophaea (Greene) Abrams -- not accepted
  Hosackia nivea (Greene) S. Watson -- not accepted
  Hosackia oblongifolia var. cuprea (Greene) Ottley -- accepted -- streambank bird's-foot trefoil
  Hosackia ornithopa Greene -- not accepted
  Hosackia strigosa var. hirtella (Greene) H.M. Hall -- not accepted
  Hosackia tomentella (Greene) Brand -- not accepted
  Hydastylus elmeri (Greene) E.P. Bicknell -- not accepted
  Hymenopappus filifolius var. lugens (Greene) Jeps. -- accepted -- fineleaf hymenopappus, Idaho hymenopappus, yellow cutleaf
  Hymenopappus filifolius var. parvulus (Greene) B.L. Turner -- accepted -- fineleaf hymenopappus
  Hymenopappus lugens Greene -- not accepted
  Hymenopappus robustus Greene -- not accepted
  Hymenoxys acaulis var. arizonica (Greene) K.F. Parker -- not accepted -- Arizona hymenoxys
  Hymenoxys acaulis var. ivesiana (Greene) K.F. Parker -- not accepted
  Hymenoxys acaulis var. lanata (Greene) Cronquist -- not accepted
  Hymenoxys argentea var. ivesiana (Greene) Cronquist -- not accepted
  Hymenoxys herbacea (Greene) Cusick -- not accepted -- lakeside daisy
  Hymenoxys ivesiana (Greene) K.F. Parker -- not accepted
  Hymenoxys lemmonii (Greene) Cockerell -- accepted -- Lemmon's bitterweed, Lemmon's rubberweed
  Hypericum parvulum Greene -- accepted -- Sierra Madre St. Johnswort
  Ibervillea Greene -- accepted -- globeberry
  Ibervillea lindheimeri (A. Gray) Greene -- accepted -- balsamgourd, Lindheimer's globeberry, Rio Grande globeberry
  Ibervillea tripartita (Naudin) Greene -- not accepted
  Iliamna Greene -- accepted -- wild hollyhock
  Iliamna acerifolia (Nutt. ex Torr. & A. Gray) Greene -- not accepted
  Iliamna angulata Greene -- not accepted
  Iliamna remota Greene -- accepted -- Kankakee globe-mallow
  Iliamna rivularis (Douglas ex Hook.) Greene -- accepted -- streambank globemallow, streambank wild hollyhock, streambank wildhollyhock
  Iliamna rivularis var. rivularis (Douglas ex Hook.) Greene -- accepted -- Peter's mountain mallow, streambank wild hollyhock
  Iodanthus dentatus (Torr.) Greene -- not accepted
  Ionactis Greene -- accepted -- aster, ionactis
  Ionactis alpina (Nutt.) Greene -- accepted -- crag aster, lava aster
  Ionactis linariifolia (L.) Greene -- accepted -- flaxleaf whitetop aster
  Ionactis linariifolius (L.) Greene -- not accepted -- flaxleaf whitetop aster, savoryleaf aster
  Ionactis stenomeres (A. Gray) Greene -- accepted -- Rocky Mountain aster
  Ipomopsis aggregata ssp. arizonica (Greene) V.E. Grant & A.D. Grant -- not accepted
  Ipomopsis aggregata ssp. collina (Greene) Wilken & Allred -- accepted -- scarlet gilia
  Ipomopsis aggregata ssp. formosissima (Greene) Wherry -- accepted -- scarlet gilia, scarlet skyrocket, skyrocket gilia
  Ipomopsis aggregata ssp. texana (Greene) W.C. Martin & C.R. Hutchins -- not accepted
  Ipomopsis aggregata var. texana (Greene) Shinners -- not accepted
  Ipomopsis arizonica (Greene) Wherry -- accepted -- Arizona ipomopsis, Arizona skyrocket
  Ipomopsis arizonica ssp. texana (Greene) Wherry -- not accepted
  Isocoma acradenia (Greene) Greene -- accepted -- alkali goldenbush, alkali jimmyweed
  Isocoma acradenia ssp. acradenia Greene -- not accepted -- alkali goldenbush
  Isocoma acradenia ssp. eremophila (Greene) R.M. Beauch. -- not accepted
  Isocoma acradenia var. acradenia (Greene) Greene -- accepted -- alkali goldenbush, alkali goldenweed
  Isocoma acradenia var. bracteosa (Greene) G.L. Nesom -- accepted -- alkali goldenbush
  Isocoma acradenia var. eremophila (Greene) G.L. Nesom -- accepted -- alkali goldenbush, goldenweed
  Isocoma arguta Greene -- accepted -- Carquinez goldenbush
  Isocoma bracteosa Greene -- not accepted
  Isocoma coronopifolia (A. Gray) Greene -- accepted -- common goldenbush, goldenweed
  Isocoma coronopifolia var. coronopifolia (Gray) Greene -- not accepted -- common jimmyweed
  Isocoma coronopifolia var. pedicellata (Greene) G.L. Nesom -- not accepted -- common jimmyweed
  Isocoma drummondii (Torr. & A. Gray) Greene -- accepted -- Drummond's goldenbush, Drummond's goldenweed, Drummond's jimmyweed
  Isocoma eremophila Greene -- not accepted
  Isocoma menziesii var. decumbens (Greene) G.L. Nesom -- accepted -- Menzies' goldenbush
  Isocoma menziesii var. sedoides (Greene) G.L. Nesom -- accepted -- Menzies' goldenbush
  Isocoma oxyphylla Greene -- not accepted
  Isocoma pedicellata Greene -- not accepted
  Isocoma pluriflora (Torr. & A. Gray) Greene -- accepted -- rayless goldenrod, southern goldenbush, southern jimmyweed
  Isocoma reneta (Kunth) Greene -- accepted
  Isocoma rusbyi Greene -- accepted -- Rusby's goldenbush
  Isocoma tenuisecta Greene -- accepted -- burrow goldenweed, burroweed
  Isocoma veneta (Kunth) Greene -- accepted -- jimmyweed
  Isocoma veneta var. furfuracea (Greene) R.M. Beauch. -- not accepted
  Isocoma veneta var. oxyphylla (Greene) R.M. Beauch. -- not accepted
  Isocoma veneta var. sedoides (Greene) Jeps. -- not accepted
  Isocoma veneta var. veneta (Kunth) Greene -- not accepted -- jimmyweed
  Ivesia saxosa (Lemmon ex Greene) Ertter -- accepted -- rock mousetail
  Jacksonia tenuifolia (Torr. & A. Gray) Greene -- not accepted
  Jensia rammii (Greene) B.G. Baldw. -- accepted -- Ramm's madia
  Jepsonia malvifolia (Greene) Small -- accepted -- island jepsonia
  Juncus uncialis Greene -- accepted -- twelfth rush
  Koellia curvipes Greene -- not accepted
  Kraunhia frutescens (L.) Greene -- not accepted
  Kumlienia Greene -- not accepted -- false buttercup
  Kumlienia cooleyae (Vasey & Rose) Greene -- not accepted -- Cooley's false buttercup
  Kumlienia hystricula (A. Gray) Greene -- not accepted -- waterfall false buttercup
  Lacinaria aspera (Michx.) Greene -- not accepted
  Lacinaria elegantula Greene -- not accepted
  Lacinaria lancifolia Greene -- not accepted
  Lactuca campestris Greene -- not accepted
  Lagophylla congesta Greene -- not accepted
  Lagophylla glandulosa ssp. serrata (Greene) D.D. Keck -- not accepted
  Lagophylla ramosissima ssp. congesta (Greene) D.D. Keck -- not accepted -- branched lagophylla
  Langloisia Greene -- accepted
  Langloisia matthewsii (A. Gray) Greene -- accepted
  Langloisia schottii (Torr.) Greene -- not accepted
  Langloisia setosissima (Torr. & A. Gray ex Torr.) Greene -- accepted -- Great Basin langloisia, moth langloisia
  Langloisia setosissima ssp. setosissima (Torr. & A. Gray ex Torr.) Greene -- accepted -- Great Basin langloisia
  Laothoe angustifolia (Kellogg) Greene -- not accepted
  Laothoe parviflora (S. Watson) Greene -- not accepted
  Laothoe purpurea (Brandegee) Greene -- not accepted
  Laphamia cernua Greene -- not accepted
  Lappula deflexa var. americana (A. Gray) Greene -- not accepted
  Lappula diffusa (Lehm.) Greene -- not accepted
  Lappula floribunda (Lehm.) Greene -- not accepted
  Lappula fremontii (Torr.) Greene -- not accepted
  Lappula hispida (A. Gray) Greene -- not accepted
  Lappula occidentalis (S. Watson) Greene -- accepted -- flat-spine sheepburr, flatspine stickseed, western sticktight
  Lappula occidentalis var. occidentalis (S. Watson) Greene -- accepted -- desert stickseed, flat-spine sheepburr, flatspine stickseed, western stickseed
  Lappula redowskii auct. non (Hornem.) Greene -- not accepted
  Lappula redowskii var. desertorum (Greene) I.M. Johnst. -- not accepted
  Lappula redowskii var. redowskii (Hornem.) Greene -- not accepted -- stickseed
  Lappula texana var. coronata (Greene) A. Nelson & J.F. Macbr. -- not accepted
  Lappula texana var. heterosperma (Greene) A. Nelson & J.F. Macbr. -- not accepted
  Lappula virginiana (L.) Greene -- not accepted
  Lasallea sericea (Vent.) Greene -- not accepted
  Lasthenia burkei (Greene) Greene -- accepted -- Burke's baeria, Burke's goldfields
  Lasthenia chrysantha (Greene ex A. Gray) Greene -- accepted -- alkali sink goldfields
  Lasthenia chrysostoma (Fisch. & C.A. Mey.) Greene -- not accepted
  Lasthenia conjugens Greene -- accepted -- Contra Costa goldfields
  Lasthenia debilis (Greene ex A. Gray) Ornduff -- accepted -- Greene's goldfields
  Lasthenia fremontii (Torr. ex A. Gray) Greene -- accepted -- Fremont's goldfields
  Lasthenia gracilis (DC.) Greene -- accepted -- needle goldfields
  Lasthenia macrantha (A. Gray) Greene -- not accepted -- perennial goldfields
  Lasthenia macrantha ssp. macrantha (A. Gray) Greene -- not accepted -- perennial goldfields
  Lasthenia microglossa (DC.) Greene -- accepted -- smallray goldfields
  Lasthenia platycarpha (A. Gray) Greene -- accepted -- alkali goldfields
  Lathyrus japonicus var. aleuticus (Greene ex T.G. White) Fernald -- not accepted
  Lathyrus jepsonii Greene -- accepted -- Delta tule pea, Jepson's sweet pea
  Lathyrus jepsonii ssp. jepsonii Greene -- not accepted -- Delta tule-pea
  Lathyrus jepsonii var. jepsonii Greene -- accepted -- Delta tule pea
  Lathyrus laetiflorus Greene -- not accepted
  Lathyrus laetiflorus var. laetiflorus Greene -- not accepted
  Lathyrus laetivirens Greene ex Rydb. -- accepted -- aspen pea, aspen peavine, aspen vetchling, plateau peavine
  Lathyrus lanszwertii var. laetivirens (Greene ex Rydb.) S.L. Welsh -- not accepted
  Lathyrus leucanthus var. laetivirens (Greene ex Rydb.) C.L. Hitchc. -- not accepted
  Lathyrus puberulus T.G. White ex Greene -- not accepted
  Lathyrus vestitus ssp. laetiflorus (Greene) Broich -- not accepted -- Pacific pea
  Lathyrus vestitus ssp. puberulus (T.G. White ex Greene) C.L. Hitchc. -- not accepted
  Lathyrus vestitus var. puperulus (T.G. White ex Greene) C.L. Hitchc. -- not accepted
  Lathyrus vestitus var. violaceus (Greene) Abrams -- not accepted
  Lathyrus violaceus Greene -- not accepted
  Lecticula resupinata (B.D. Greene ex Bigelow) Barnhart -- not accepted
  Legenere limosa (Greene) McVaugh -- not accepted -- false Venus' looking glass, legenere
  Leiostemon ambiguus (Torr.) Greene -- not accepted
  Lembertia Greene -- not accepted -- lembertia
  Lembertia congdonii (A. Gray) Greene -- not accepted -- San Joaquin woollythread, San Joaquin wooly-threads
  Lepargyrea argentea (Pursh) Greene -- not accepted
  Lepargyrea canadensis (L.) Greene -- not accepted
  Lepechinia fragrans (Greene) Epling -- accepted -- island pitchersage
  Lepidium crenatum (Greene) Rydb. -- accepted -- alkali pepperweed
  Lepidium medium Greene -- not accepted
  Lepidium medium var. pubescens (Greene) B.L. Rob. -- not accepted
  Lepidium nitidum var. insigne Greene -- not accepted
  Lepidium nitidum var. oreganum (Howell ex Greene) C.L. Hitchc. -- not accepted -- shining pepperweed
  Lepidium virginicum var. medium (Greene) C.L. Hitchc. -- not accepted -- intermediate pepperweed, medium pepperweed
  Lepidium virginicum var. pubescens (Greene) Thell. -- not accepted -- hairy pepperweed
  Leptodactylon lilacinum Greene ex Brand -- not accepted
  Leptosiphon acicularis (Greene) Jeps. -- accepted -- bristly linanthus
  Leptosiphon ciliatus ssp. neglectus (Greene) J.M. Porter & L.A. Johnson -- accepted -- whiskerbrush
  Leptosiphon montanus (Greene) J.M. Porter & L.A. Johnson -- accepted -- mustang clover
  Leptosiphon nudatus (Greene) J.M. Porter & L.A. Johnson -- accepted -- Tehachapi linanthus
  Leptosiphon serrulatus (Greene) J.M. Porter & L.A. Johnson -- accepted -- Madera linanthus
  Lesquerella alpina ssp. parvula (Greene) Rollins & E.A. Shaw -- not accepted
  Lesquerella alpina var. angustifolia (Greene) Rollins & E.A. Shaw -- not accepted
  Lesquerella alpina var. parvula (Greene) S.L. Welsh & Reveal -- not accepted
  Lesquerella diversifolia Greene -- not accepted
  Lesquerella foliacea Greene -- not accepted
  Lesquerella kingii ssp. diversifolia (Greene) Rollins & E.A. Shaw -- not accepted -- King bladderpod
  Lesquerella occidentalis ssp. diversifolia (Greene) Maguire & A.H. Holmgren -- not accepted
  Lesquerella occidentalis var. diversifolia (Greene) C.L. Hitchc. -- not accepted
  Lesquerella parvula Greene -- not accepted -- pygmy bladderpod
  Lesquerella pruinosa Greene -- not accepted -- Pagosa Springs bladderpod
  Lesquerella valida Greene -- not accepted -- strong bladderpod
  Lessingia arachnoidea Greene -- accepted -- Crystal Springs lessingia
  Lessingia germanorum var. parvula (Greene) J.T. Howell -- not accepted
  Lessingia germanorum var. pectinata (Greene) J.T. Howell -- not accepted
  Lessingia germanorum var. tomentosa (Greene) J.T. Howell -- not accepted
  Lessingia glandulifera var. pectinata (Greene) Jeps. -- not accepted -- valley lessingia
  Lessingia glandulifera var. tomentosa (Greene) Ferris -- accepted -- Warner Springs lessingia
  Lessingia hololeuca Greene -- accepted -- woollyhead lessingia
  Lessingia hololeuca var. arachnoidea (Greene) J.T. Howell -- not accepted
  Lessingia hololeuca var. hololeuca Greene -- not accepted -- woollyhead vinegarweed
  Lessingia micradenia Greene -- accepted -- Mt. Tamalpais lessingia
  Lessingia micradenia var. arachnoidea (Greene) Ferris -- not accepted
  Lessingia micradenia var. micradenia Greene -- accepted -- Mt. Tamalpais lessingia
  Lessingia nemaclada Greene -- accepted -- Mendocino lessingia, slenderstem lessingia
  Lessingia nemaclada var. mendocina (Greene) J.T. Howell -- not accepted -- Mendocino lessingia
  Lessingia nemaclada var. nemaclada Greene -- not accepted -- slenderstem lessingia
  Lessingia pectinata Greene -- accepted -- valley lessingia
  Lessingia pectinata var. pectinata Greene -- accepted
  Lessingia ramulosa var. adenophora (Greene) A. Gray -- not accepted -- Sonoma lessingia
  Lessingia ramulosa var. micradenia (Greene) J.T. Howell -- not accepted
  Lessingia virgata var. glomerata (Greene) J.T. Howell -- not accepted -- wand lessingia
  Leucelene Greene -- not accepted
  Leucelene ericoides (Torr.) Greene -- not accepted
  Leucosyris carnosa (A. Gray) Greene -- not accepted
  Leucosyris spinosa (Benth.) Greene -- not accepted
  Liatris earlei (Greene) K. Schum. -- not accepted
  Liatris elegantula (Greene) K. Schum. -- accepted -- shaggy blazing star
  Liatris graminifolia var. elegantula (Greene) K. Schum. -- not accepted
  Liatris lancifolia (Greene) Kittell -- accepted -- lanceleaf blazing star, lanceleaf gayfeather
  Liatris pilosa var. elegantula (Greene) Kartesz -- not accepted -- shaggy blazing star
  Liatris scabra (Greene) K. Schum. -- not accepted
  Ligularia amplectens var. holmii (Greene) Dorn -- not accepted
  Ligularia holmii (Greene) W.A. Weber -- not accepted
  Ligularia porteri (Greene) W.A. Weber -- not accepted
  Ligularia pudica (Greene) W.A. Weber -- not accepted
  Lilaeopsis Greene -- accepted -- grasswort
  Lilaeopsis lineata (Michx.) Greene -- not accepted
  Limnanthes alba ssp. versicolor (Greene) C.T. Mason -- accepted -- white meadowfoam
  Limnanthes alba var. versicolor (Greene) C.T. Mason -- not accepted
  Limnanthes versicolor (Greene) Rydb. -- not accepted
  Limnorchis saccata (Greene) Á. Löve & W. Simon -- not accepted
  Linanthus acicularis Greene -- not accepted -- bristly linanthus
  Linanthus ambiguus (Rattan) Greene -- not accepted -- serpentine linanthus
  Linanthus androsaceus (Benth.) Greene -- not accepted -- false babystars
  Linanthus androsaceus ssp. androsaceus (Benth.) Greene -- not accepted -- false babystars
  Linanthus androsaceus ssp. luteolus (Greene) H. Mason -- not accepted
  Linanthus aureus (Nutt.) Greene -- not accepted -- desert gold, golden desert-trumpets, golden deserttrumpets, golden linanthus
  Linanthus aureus ssp. aureus (Nutt.) Greene -- not accepted -- golden deserttrumpets, golden linanthus
  Linanthus bellus (A. Gray) Greene -- accepted -- desert beauty
  Linanthus bicolor (Nutt.) Greene -- not accepted -- true babystars
  Linanthus bicolor ssp. bicolor (Nutt.) Greene -- not accepted -- true babystars
  Linanthus bigelovii (A. Gray) Greene -- accepted -- Bigelow's deserttrumpets, Bigelow's linanthus
  Linanthus bolanderi (A. Gray) Greene -- not accepted -- Bolander's linanthus
  Linanthus breviculus (A. Gray) Greene -- not accepted -- Mojave linanthus
  Linanthus ciliatus (Benth.) Greene -- not accepted -- bristlyleaf linanthus, whiskerbrush
  Linanthus ciliatus var. ciliatus (Benth.) Greene -- not accepted -- whiskerbrush
  Linanthus ciliatus var. neglectus (Greene) Jeps. -- not accepted -- whiskerbrush
  Linanthus demissus (A. Gray) Greene -- accepted -- desert linanthus, desertsnow
  Linanthus dianthiflorus (Benth.) Greene -- accepted -- fringed linanthus
  Linanthus dianthiflorus ssp. dianthiflorus (Benth.) Greene -- not accepted -- fringed linanthus
  Linanthus filipes (Benth.) Greene -- not accepted -- thread linanthus
  Linanthus floribundus (A. Gray) Greene ex Milliken -- not accepted -- manyflower deserttrumpets, manyflower linanthus
  Linanthus floribundus ssp. floribundus (A. Gray) Greene ex Milliken -- not accepted -- many-flower desert-trumpets, manyflower linanthus
  Linanthus gradiflorus (Benth.) Greene -- not accepted
  Linanthus grandiflorus (Benth.) Greene -- not accepted -- largeflower linanthus
  Linanthus harknessii (Curran) Greene -- not accepted -- Harkness' flaxflower, threeseed linanthus
  Linanthus harknessii ssp. harknessii (Curran) Greene -- not accepted -- Harkness' flaxflower
  Linanthus jonesi (A. Gray) Greene -- not accepted
  Linanthus jonesii (A. Gray) Greene -- accepted -- Jones' desert-trumpets, Jones' linanthus
  Linanthus lemmonii (A. Gray) Greene -- not accepted -- Lemmon's linanthus
  Linanthus liniflorus (Benth.) Greene -- not accepted -- narrowflower flaxflower
  Linanthus liniflorus ssp. liniflorus (Benth.) Greene -- not accepted -- narrowflower flaxflower
  Linanthus montanus (Greene) Greene -- not accepted -- mustang clover
  Linanthus neglectus Greene -- not accepted
  Linanthus nudatus Greene -- not accepted -- Tehachapi linanthus
  Linanthus nuttallii (A. Gray) Greene ex Milliken -- not accepted -- Nuttall's desert-trumpets, Nuttall's deserttrumpets, Nuttall's linanthus
  Linanthus nuttallii ssp. nuttallii (A. Gray) Greene ex Milliken -- not accepted -- Nuttall's desert-trumpets, Nuttall's linanthus
  Linanthus parryae (A. Gray) Greene -- accepted -- sandblossoms
  Linanthus parviflorus (Benth.) Greene -- not accepted -- variable linanthus
  Linanthus pharnaceoides (Benth.) Greene -- not accepted
  Linanthus rattanii (A. Gray) Greene -- not accepted -- Rattan's linanthus
  Linanthus serrulatus Greene -- not accepted -- Madera linanthus
  Linum clevelandii Greene -- not accepted
  Linum neomexicanum Greene -- accepted -- New Mexico yellow flax
  Lithophragma rupicola Greene -- not accepted
  Lithophragma scabrellum (Greene) Greene -- not accepted
  Lithophragma tripartitum (Greene) Greene -- not accepted
  Lithospermum cobrense Greene -- accepted -- smooth pucoon, smooththroat gromwell, smooththroat stoneseed
  Lithospermum viride Greene -- accepted -- green gromwell, green stoneseed
  Llyonothamnus floribundus var. aspleniifolius (Greene) P.H. Raven -- not accepted
  Lobelia dunnii Greene -- not accepted -- Dunn's lobelia
  Lobelia dunnii ssp. dunnii Greene -- not accepted
  Lobelia dunnii ssp. dunnii var. dunnii Greene -- not accepted
  Lobelia dunnii var. dunnii Greene -- not accepted -- Dunn's lobelia
  Lobelia hirtella (A. Gray) Greene -- not accepted
  Lorandersonia linifolia (Greene) Urbatsch, R.P. Roberts & Neubig -- accepted -- spearleaf rabbitbrush
  Lotus argophyllus (A. Gray) Greene -- not accepted -- silver bird's-foot trefoil
  Lotus argophyllus ssp. niveus (Greene) Munz -- not accepted -- Santa Cruz Island silver hosackia
  Lotus argophyllus ssp. ornithopus (Greene) P.H. Raven -- not accepted
  Lotus argophyllus var. argophyllus (A. Gray) Greene -- not accepted -- silver bird's-foot trefoil
  Lotus argophyllus var. niveus (Greene) Ottley -- not accepted -- Santa Cruz Island silverhosackia
  Lotus argophyllus var. ornithopus (Greene) Ottley -- not accepted
  Lotus argyraeus (Greene) Greene -- not accepted -- canyon bird's-foot trefoil, silver trefoil
  Lotus argyraeus var. argyraeus (Greene) Greene -- not accepted -- canyon bird's-foot trefoil
  Lotus balsamiferus (Kellogg) Greene -- not accepted
  Lotus benthamii Greene -- not accepted -- Bentham's broom
  Lotus biolettii Greene -- not accepted
  Lotus chihuahuanus (S. Watson) Greene -- accepted
  Lotus crassifolius (Benth.) Greene -- not accepted -- big deervetch
  Lotus crassifolius var. crassifolius (Benth.) Greene -- not accepted -- big deervetch
  Lotus cupreus Greene -- not accepted
  Lotus davidsonii Greene -- not accepted
  Lotus dendroideus (Greene) Greene -- not accepted -- island broom
  Lotus dendroideus var. dendroideus (Greene) Greene -- not accepted -- island broom
  Lotus dendroideus var. veatchii (Greene) Isely -- not accepted -- Veatch's island broom
  Lotus denticulatus (Drew) Greene -- not accepted -- riverbar bird's-foot trefoil
  Lotus douglasii Greene -- not accepted
  Lotus eriophorus Greene -- not accepted
  Lotus formosissimus Greene -- not accepted -- seaside bird's-foot trefoil
  Lotus grandiflorus (Benth.) Greene -- not accepted -- chaparral bird's-foot trefoil
  Lotus grandiflorus var. grandiflorus (Benth.) Greene -- not accepted -- chaparral bird's-foot trefoil
  Lotus grandiflorus var. macranthus (Greene) Isely -- not accepted -- chaparral bird's-foot trefoil
  Lotus hamatus Greene -- not accepted -- San Diego bird's-foot trefoil, San Diego bird's-foot-trefoil
  Lotus haydonii (Orcutt) Greene -- not accepted -- rock bird's-foot trefoil
  Lotus heermannii (Durand & Hilg.) Greene -- not accepted -- Heermann's bird's-foot trefoil
  Lotus heermannii var. eriophorus (Greene) Ottley -- not accepted
  Lotus heermannii var. heermannii (Durand & Hilg.) Greene -- not accepted -- Heermann's bird's-foot trefoil
  Lotus humistratus Greene -- not accepted -- foothill deervetch, maresfat
  Lotus incanus (Torr.) Greene -- not accepted -- woolly bird's-foot trefoil
  Lotus junceus (Benth.) Greene -- not accepted -- rush broom
  Lotus junceus var. biolettii (Greene) Ottley -- not accepted -- Biolett's rush broom, Bioletti's rush broom
  Lotus junceus var. junceus (Benth.) Greene -- not accepted -- rush broom
  Lotus macranthus (Greene) Greene -- not accepted
  Lotus mearnsii (Britton) Greene -- not accepted -- Mearns' bird's-foot trefoil
  Lotus mearnsii var. mearnsii (Britton) Greene -- not accepted -- Mearns' bird's-foot trefoil
  Lotus neomexicanus Greene -- not accepted
  Lotus nevadensis (S. Watson) Greene -- not accepted -- Nevada bird's-foot trefoil, Nevada trefoil
  Lotus nevadensis var. davidsonii (Greene) Isely -- not accepted -- Davidson's bird's-foot trefoil
  Lotus nevadensis var. douglasii (Greene) Ottley -- not accepted -- Douglas' bird's-foot trefoil
  Lotus nevadensis var. nevadensis (S. Watson) Greene -- not accepted -- Nevada bird's-foot trefoil, Nevada trefoil
  Lotus nevandensis (S. Watson) Greene -- not accepted
  Lotus niveus Greene -- not accepted
  Lotus nuttallianus Greene -- not accepted -- prostrate lotus, wire bird's-foot trefoil
  Lotus oblongifolius (Benth.) Greene -- not accepted -- narrowleaf trefoil, streambank bird's-foot trefoil, streambank bird's-foot-trefoil
  Lotus oblongifolius var. cupreus (Greene) Ottley -- not accepted -- streambank bird's-foot trefoil
  Lotus oblongifolius var. oblongifolius (Benth.) Greene -- not accepted -- streambank bird's-foot trefoil, streambank trefoil
  Lotus procumbens (Greene) Greene -- not accepted -- silky deerweed
  Lotus procumbens var. procumbens (Greene) Greene -- not accepted -- silky deerweed
  Lotus rigidus (Benth.) Greene -- not accepted -- shrubby deervetch
  Lotus rubellus (Nutt.) Greene -- not accepted
  Lotus salsuginosus Greene -- not accepted -- coastal bird's-foot trefoil, humble trefoil, maresfat
  Lotus salsuginosus var. salsuginosus Greene -- not accepted -- coastal bird's-foot trefoil
  Lotus scoparius var. dendroideus (Greene) Ottley -- not accepted
  Lotus scoparius var. veatchii (Greene) Ottley -- not accepted
  Lotus stipularis (Benth.) Greene -- not accepted -- balsam bird's-foot trefoil
  Lotus stipularis var. stipularis (Benth.) Greene -- not accepted -- balsam bird's-foot trefoil
  Lotus strigosus (Nutt.) Greene -- not accepted -- Bishop's lotus, strigose bird's-foot trefoil, strigose bird's-foot-trefoil
  Lotus strigosus var. hirtellus (Greene) Ottley -- not accepted -- strigose bird's-foot trefoil
  Lotus strigosus var. strigosus (Nutt.) Greene -- not accepted -- strigose bird's-foot trefoil, strigose deervetch
  Lotus strigosus var. tomentellus (Greene) Isely -- not accepted -- desert deervetch, Green's desert deervetch, strigose bird's-foot trefoil
  Lotus tomentellus Greene -- not accepted
  Lotus torreyi (A. Gray) Greene -- not accepted
  Lotus wrightii (A. Gray) Greene -- not accepted -- Wright deervetch, Wright's deervetch
  Luetkea hendersonii (Canby) Greene -- not accepted
  Luina stricta (Greene) B.L. Rob. -- not accepted
  Lupinus abortivus Greene -- not accepted
  Lupinus aduncus Greene -- not accepted
  Lupinus albicaulis var. hyacinthinus (Greene ex C.F. Baker) Jeps. -- not accepted
  Lupinus albicaulis var. sylvestris Greene -- not accepted
  Lupinus albifrons ssp. eminens (Greene) D.B. Dunn -- not accepted
  Lupinus albifrons var. collinus Greene -- accepted -- silver lupine
  Lupinus albifrons var. eminens (Greene) C.P. Sm. -- accepted -- silver lupine
  Lupinus alsophilus Greene -- not accepted
  Lupinus ammophilus Greene -- accepted -- sand lupine
  Lupinus amplus Greene -- not accepted
  Lupinus apricus Greene -- not accepted
  Lupinus arcenthinus Greene -- not accepted
  Lupinus arceuthinus Greene -- not accepted
  Lupinus argenteus ssp. ingratus (Greene) Harmon -- accepted -- silvery lupine
  Lupinus argenteus ssp. rubricaulis (Greene) L.W. Hess & D.B. Dunn -- accepted -- silvery lupine
  Lupinus argenteus var. hillii (Greene) Barneby -- not accepted
  Lupinus argenteus var. myrianthus (Greene) Isely -- not accepted
  Lupinus argenteus var. rubricaulis (Greene) S.L. Welsh -- not accepted
  Lupinus argentus var. ingratus (Greene) Harmon -- not accepted
  Lupinus argentus var. rubricaulis (Greene) L.W. Hess & D.B. Dunn -- not accepted
  Lupinus aridus var. abortivus (Greene) C.P. Sm. -- not accepted
  Lupinus bakeri Greene -- accepted -- Baker's lupine
  Lupinus bakeri ssp. amplus (Greene) Fleak & D.B. Dunn -- accepted -- Baker's lupine
  Lupinus bakeri ssp. bakeri Greene -- accepted -- Baker's lupine
  Lupinus bicolor ssp. umbellatus (Greene) D.B. Dunn -- accepted -- miniature lupine
  Lupinus bicolor ssp. umbellatus var. umbellatus (Greene) C.P. Sm. -- not accepted -- miniature lupine
  Lupinus bicolor var. umbellatus (Greene) C.P. Sm. -- accepted -- miniature lupine
  Lupinus blumeri Greene -- not accepted
  Lupinus capitatus Greene -- not accepted
  Lupinus caudatus var. rubricaulis (Greene) C.P. Sm. -- not accepted
  Lupinus chionophilus Greene ex C.F. Baker -- not accepted
  Lupinus convillei Greene -- not accepted
  Lupinus covillei Greene -- accepted -- shaggy lupine
  Lupinus crassulus Greene ex C.F. Baker -- not accepted
  Lupinus culbertsonii Greene -- accepted -- Hoskett Meadows lupine
  Lupinus culbertsonii ssp. culbertsonii Greene -- accepted -- Hoskett Meadows lupine
  Lupinus culbertsonii ssp. hypolasius (Greene) B.J. Cox -- accepted -- Hoskett Meadows lupine
  Lupinus cusickii ssp. abortivus (Greene) B.J. Cox -- accepted -- Cusick's lupine
  Lupinus dasyphyllus Greene -- not accepted
  Lupinus debilis Greene ex C.F. Baker -- not accepted
  Lupinus dichrous Greene -- not accepted
  Lupinus douglasii var. fallax (Greene) J.T. Howell -- not accepted
  Lupinus elmeri Greene -- accepted -- Elmer's lupine
  Lupinus elongatus Greene ex A. Heller -- not accepted
  Lupinus floribundus Greene -- not accepted
  Lupinus formosus Greene -- accepted -- summer lupine
  Lupinus formosus var. bridgesii (S. Watson) Greene -- not accepted
  Lupinus formosus var. formosus Greene -- accepted -- summer lupine
  Lupinus formosus var. hyacinthinus (Greene ex C.F. Baker) C.P. Sm. -- not accepted
  Lupinus franciscanus Greene -- not accepted
  Lupinus fruticulosus Greene -- not accepted
  Lupinus fulcratus Greene -- accepted -- greenstipule lupine
  Lupinus gracilentus Greene -- accepted -- green slender lupine
  Lupinus guadalupensis Greene -- accepted -- Guadalupe Island lupine
  Lupinus habrocomus Greene -- not accepted
  Lupinus helleri Greene -- not accepted
  Lupinus hillii Greene -- accepted -- Hill's lupine
  Lupinus hillii var. hillii Greene -- accepted -- Hill's lupine
  Lupinus hirsutulus Greene -- not accepted
  Lupinus hyacinthinus Greene ex C.F. Baker -- accepted -- San Jacinto lupine
  Lupinus hypolasius Greene -- not accepted
  Lupinus ingratus Greene -- not accepted
  Lupinus lasiotropis Greene ex Eastw. -- not accepted
  Lupinus latifolius ssp. longipes (Greene) Kenney & D.B. Dunn -- accepted -- broadleaf lupine
  Lupinus latifolius var. ligulatus (Greene) C.P. Sm. -- not accepted
  Lupinus lepidus var. culbertsonii (Greene) C.P. Sm. -- not accepted
  Lupinus leptostachys Greene -- not accepted
  Lupinus leptostachyus Greene -- not accepted
  Lupinus ligulatus Greene -- not accepted
  Lupinus lobbii (A. Gray ex S. Watson) A. Gray ex Greene -- not accepted
  Lupinus longipes Greene -- not accepted
  Lupinus ludovicianus Greene -- accepted -- San Luis lupine
  Lupinus lyallii ssp. lyallii var. fruticulosus (Greene) C.P. Sm. -- not accepted -- dwarf mountain lupine
  Lupinus lyallii var. fruticulosus (Greene) C.P. Sm. -- accepted -- dwarf mountain lupine
  Lupinus magnus Greene -- not accepted
  Lupinus malacophyllus Greene -- accepted -- jawleaf lupine, softleaf lupine
  Lupinus micheneri Greene -- not accepted
  Lupinus michneri Greene -- not accepted
  Lupinus micranthus var. pachylobus (Greene) Jeps. -- not accepted
  Lupinus myrianthus Greene -- not accepted
  Lupinus nanus var. apricus (Greene) C.P. Sm. -- not accepted
  Lupinus nanus var. carnosulus (Greene) C.P. Sm. -- not accepted
  Lupinus nemoralis Greene -- not accepted
  Lupinus neomexicanus Greene -- accepted -- New Mexico lupine
  Lupinus ovinus Greene -- not accepted
  Lupinus pachylobus Greene -- accepted -- Mt. Diablo lupine
  Lupinus parviflorus ssp. floribundus (Greene) Harmon -- accepted -- lodgepole lupine
  Lupinus parviflorus ssp. myrianthus (Greene) Harmon -- accepted -- lodgepole lupine
  Lupinus parviflorus ssp. myrianthus var. myrianthus (Greene) Harmon -- not accepted -- lodgepole lupine
  Lupinus parviflorus var. myrianthus (Greene) Harmon -- accepted -- lodgepole lupine
  Lupinus perditorum Greene -- not accepted
  Lupinus plebeius Greene ex C.F. Baker -- not accepted
  Lupinus polycarpus Greene -- accepted -- smallflower lupine
  Lupinus polyphyllus var. ammophilus (Greene) Barneby -- not accepted
  Lupinus pondii Greene -- not accepted
  Lupinus procerus Greene ex A. Heller -- not accepted
  Lupinus rubricaulis Greene -- not accepted
  Lupinus sparsiflorus ssp. pondii (Greene) Dziekanowski & D.B. Dunn -- accepted -- Pond's Mojave lupine
  Lupinus sparsiflorus var. pondii (Greene) C.P. Sm. -- not accepted
  Lupinus superbus var. elongatus (Greene ex A. Heller) C.P. Sm. -- not accepted
  Lupinus tidestromii Greene -- accepted -- clover lupine, Tidestrom's lupine
  Lupinus tidestromii var. tidestromii Greene -- accepted -- Tidestrom's lupine
  Lupinus umbellatus Greene -- not accepted
  Lupinus vallicola ssp. apricus (Greene) D.B. Dunn -- accepted -- open lupine
  Lupinus vallicola var. apricus (Greene) C.P. Sm. -- not accepted
  Lupinus volcanicus Greene -- not accepted
  Lupinus volutans Greene -- accepted -- pinyon lupine
  Lupinus yukonensis Greene -- not accepted
  Lycium brevipes var. hassei (Greene) C.L. Hitchc. -- not accepted
  Lycium hassei Greene -- accepted -- Santa Catalina Island desert-thorn
  Lycium richii var. hassei (Greene) I.M. Johnst. -- not accepted
  Lycopus asper Greene -- accepted -- rough bugleweed, rough water-horehound
  Lygodesmia texana (Torr. & A. Gray) Greene -- accepted -- Texas skeletonplant
  Lyonothamnus aspleniifolius Greene -- not accepted
  Lyonothamnus floribundus ssp. aspleniifolius (Greene) P.H. Raven -- not accepted -- Catalina ironwood, fern-leaf Catalina ironwood, Santa Cruz Island ironwood
  Lyonothamnus floribundus var. aspleniifolius (Greene) Brandegee -- not accepted
  Lysimachia ciliata var. validula (Greene ex Wooton & Standl.) Kearney & Peebles -- not accepted
  Lysimachia graminea (Greene) Hand.-Mazz. -- accepted -- grassleaf yellow loosestrife
  Lythrum adsurgens Greene -- not accepted
  Machaeranthera aquifolia Greene ex Woot. & Standl. -- not accepted
  Machaeranthera asteroides (Torr.) Greene -- not accepted
  Machaeranthera asteroides var. asteroides (Torr.) Greene -- not accepted -- New Mexico tansyaster
  Machaeranthera australis (Greene) Shinners -- not accepted
  Machaeranthera bigelovii (A. Gray) Greene -- not accepted -- Bigelow's machaeranthera, Bigelow's tansy-aster, Bigelow's tansyaster
  Machaeranthera bigelovii var. bigelovii (A. Gray) Greene -- not accepted -- Bigelow tansyaster, Bigelow's tansyaster
  Machaeranthera bigelovii var. commixta (Greene) B.L. Turner -- not accepted -- Bigelow's tansyaster
  Machaeranthera bigelovii var. mucronata (Greene) B.L. Turner -- not accepted -- Bigelow tansyaster, Bigelow's tansyaster
  Machaeranthera boltoniae (Greene) B.L. Turner & Horne -- not accepted
  Machaeranthera canescens ssp. canescens var. leucanthemifolia (Greene) Welsh -- not accepted -- whiteflower machaeranthera, whiteflower tansyaster
  Machaeranthera canescens var. commixta (Greene) S.L. Welsh -- not accepted
  Machaeranthera canescens var. leucanthemifolia (Greene) Welsh -- not accepted -- whiteflower tansyaster
  Machaeranthera centaureoides Greene ex Woot. & Standl. -- not accepted
  Machaeranthera cichoriacea Greene -- not accepted
  Machaeranthera commixta Greene -- not accepted
  Machaeranthera divaricata (Nutt.) Greene -- not accepted
  Machaeranthera glabella Greene ex Rydb. -- not accepted
  Machaeranthera incana (Lindl.) Greene -- not accepted
  Machaeranthera inornata (Greene) Greene -- not accepted
  Machaeranthera juncea (Greene) Shinners -- not accepted -- rush bristleweed, rush tansy-aster
  Machaeranthera laetevirens Greene non Aster laetevirens (Greene) Greene -- not accepted
  Machaeranthera leucanthemifolia (Greene) Greene -- not accepted
  Machaeranthera linearis Greene -- not accepted
  Machaeranthera linearis Rydb. non Greene -- not accepted
  Machaeranthera montana Greene -- not accepted
  Machaeranthera mucronata Greene -- not accepted
  Machaeranthera oxylepis Greene -- not accepted
  Machaeranthera parthenium Greene -- not accepted
  Machaeranthera pattersonii (A. Gray) Greene -- not accepted
  Machaeranthera pinnatifida var. scabrella (Greene) B.L. Turner & R.L. Hartm. -- not accepted -- machaeranthera
  Machaeranthera pulverulenta (Nutt.) Greene -- not accepted
  Machaeranthera rigida Greene -- not accepted
  Machaeranthera scabrella (Greene) Shinners -- not accepted
  Machaeranthera scoparia Greene -- not accepted
  Machaeranthera sessiliflora (Nutt.) Greene -- not accepted
  Machaeranthera shastensis var. montana (Greene) Cronquist & D.D. Keck -- not accepted
  Machaeranthera spinulosa (Greene) Cory non Amellus spinulosa Pursh -- not accepted
  Machaeranthera subalpina Greene -- not accepted
  Machaeranthera tagetina Greene -- accepted -- mesa tansy-aster, mesa tansyaster
  Machaeranthera tephrodes (A. Gray) Greene -- not accepted
  Machaeranthera viscosa (Nutt.) Greene -- not accepted
  Macronema greenei (A. Gray) Greene -- not accepted
  Macronema watsonii (A. Gray) Greene -- not accepted
  Madia anomala Greene -- accepted -- plumpseeded madia
  Madia citriodora Greene -- accepted -- lemonscent madia, lemonscented madia
  Madia elegans ssp. densifolia (Greene) D.D. Keck -- not accepted -- showy tarweed
  Madia elegans var. densifolia (Greene) Jeps. -- not accepted
  Madia madioides (Nutt.) Greene -- not accepted -- woodland madia
  Madia nutans (Greene) D.D. Keck -- not accepted -- nodding madia
  Madia rammii Greene -- not accepted -- Ramm's madia
  Mahonia pumila (Greene) Fedde -- not accepted
  Malacothamnus Greene -- accepted -- bushmallow
  Malacothamnus aboriginum (B.L. Rob.) Greene -- accepted -- Gray bushmallow
  Malacothamnus arcuatus (Greene) Greene -- not accepted
  Malacothamnus davidsonii (B.L. Rob.) Greene -- accepted -- Davidson's bush-mallow, Davidson's bushmallow
  Malacothamnus densiflorus (S. Watson) Greene -- accepted -- yellowstem bushmallow
  Malacothamnus fasciculatus (Nutt. ex Torr. & A. Gray) Greene -- accepted -- Mendocino bushmallow
  Malacothamnus fremontii (Torr. ex A. Gray) Torr. ex Greene -- accepted -- Fremon's bushmallow
  Malacothamnus marrubioides (Durand & Hilg.) Greene -- accepted -- pinkflowered bushmallow
  Malacothamnus orbiculatus (Greene) Greene -- not accepted
  Malacothamnus palmeri (S. Watson) Greene -- accepted -- Palmer's bushmallow
  Malacothamnus palmeri var. palmeri (S. Watson) Greene -- not accepted -- Palmer bush-mallow
  Malacothrix altissima Greene -- not accepted
  Malacothrix foliosa var. indecora (Greene) E.W. Williams -- not accepted
  Malacothrix foliosa var. squalida (Greene) E.W. Williams -- not accepted
  Malacothrix indecora Greene -- accepted -- Santa Cruz Island desertdandelion, Santa Cruz Island malocothrix
  Malacothrix insularis Greene -- accepted -- island desertdandelion
  Malacothrix insularis var. squalida (Greene) Ferris -- not accepted
  Malacothrix saxatilis var. altissima (Greene) Ferris -- not accepted
  Malacothrix squalida Greene -- accepted -- island malacothrix, Santa Cruz desertdandelion
  Malus macounii Greene -- not accepted
  Malvastrum arcuatum (Greene) B.L. Rob. -- not accepted
  Malvastrum fasciculatum (Nutt. ex Torr. & A. Gray) Greene -- not accepted
  Malvastrum orbiculatum Greene -- not accepted
  Malvastrum parryi Greene -- not accepted
  Mammillaria pondii Greene -- accepted
  Mammillaria pondii ssp. pondii Greene -- accepted
  Marah fabacea (Naudin) Greene -- accepted -- California manroot, valley manroot
  Marah fabacea var. agrestis (Greene) Stocking -- accepted -- California manroot
  Marah fabacea var. fabacea (Naudin) Greene -- accepted -- California manroot
  Marah fabaceus (Naudin) Naudin ex Greene -- not accepted -- California manroot, valley manroot
  Marah fabaceus var. agrestis (Greene) Stocking -- not accepted -- California manroot
  Marah fabaceus var. fabaceus (Naudin) Naudin ex Greene -- not accepted -- California manroot
  Marah gilensis Greene -- accepted -- Gila manroot, wild cucumber
  Marah guadalupensis (S. Watson) Greene -- not accepted
  Marah macrocarpa (Greene) Greene -- accepted -- Cucamonga manroot
  Marah macrocarpa var. macrocarpa (Greene) Greene -- accepted -- Cucamonga manroot
  Marah macrocarpus (Greene) Greene -- not accepted -- Cucamonga manroot
  Marah macrocarpus var. macrocarpus (Greene) Greene -- not accepted -- Cucamonga manroot
  Marah watsonii (Cogn.) Greene -- accepted -- taw manroot
  Matricaria occidentalis Greene -- accepted -- valley mayweed
  Meconella collina Greene -- not accepted
  Meconella denticulata Greene -- accepted -- smallflower fairypoppy
  Meconella linearis var. pulchella (Greene) Jeps. -- not accepted
  Meconella octandra Greene -- not accepted
  Meconella oregana var. denticulata (Greene) Jeps. -- not accepted
  Megalodonta Greene -- not accepted -- water-marigold, watermarigold
  Megalodonta beckii (Torr. ex Spreng.) Greene -- not accepted -- Beck's watermarigold
  Megalodonta beckii var. beckii (Torr. ex Spreng.) Greene -- not accepted -- Beck's watermarigold
  Melanidion boreale Greene -- not accepted
  Melanobatus Greene -- not accepted
  Melanobatus bernardinus Greene -- not accepted
  Melanobatus glaucifolius (Kellogg) Greene -- not accepted
  Melanobatus leucodermis (Douglas ex Torr. & A. Gray) Greene -- not accepted
  Mentzelia affinis Greene -- accepted -- hydra blazingstar, yellow comet stickleaf, yellowcomet
  Mentzelia densa Greene -- accepted -- Royal Gorge blazingstar, Royal Gorge stickleaf
  Mentzelia lutea Greene -- not accepted
  Mentzelia nitens Greene -- accepted -- shining blazingstar, shining stickleaf
  Mentzelia nitens var. nitens Greene -- accepted -- California blazingstar, shining blazingstar, shining stickleaf
  Mertensia arizonica Greene -- accepted -- aspen bluebells
  Mertensia bakeri Greene -- not accepted
  Mertensia bakeri var. bakeri Greene -- not accepted -- Baker's bluebells
  Mertensia fusiformis Greene -- not accepted -- spindleroot bluebells
  Mertensia lanceolata var. brachyloba (Greene) A. Nelson -- accepted -- prairie bluebells
  Mertensia linearis Greene -- not accepted
  Mertensia longiflora Greene -- accepted -- longflower bluebells, small bluebells
  Mertensia paniculata var. subcordata (Greene) J.F. Macbr. -- not accepted
  Mertensia platyphylla var. subcordata (Greene) L.O. Williams -- accepted -- broadleaf bluebells
  Mertensia viridis var. cynoglossoides (Greene) J.F. Macbr. -- not accepted
  Mesadenia diversifolia (Torr. & A. Gray) Greene -- not accepted
  Mesadenia floridana (A. Gray) Greene -- not accepted
  Micrampelis lobata (Michx.) Greene -- not accepted
  Micranthes aprica (Greene) Small -- accepted -- Sierra saxifrage
  Micranthes californica (Greene) Small -- accepted -- California saxifrage
  Micranthes howellii (Greene) Small -- accepted -- Howell's saxifrage
  Micranthes marshallii (Greene) Small -- accepted -- Marshall's saxifrage
  Micranthes nidifica (Greene) Small -- accepted -- peak saxifrage, swamp saxifrage
  Micranthes rhomboidea (Greene) Small -- accepted -- diamondleaf saxifrage
  Micromeria chamissonis (Benth.) Greene -- not accepted
  Microseris acuminata Greene -- accepted -- Sierra foothill silverpuffs
  Microseris campestris Greene -- accepted -- San Joaquin silverpuffs
  Microseris elegans Greene ex A. Gray -- accepted -- elegant silverpuffs
  Microseris paludosa (Greene) J.T. Howell -- accepted -- marsh silverpuffs
  Microsteris Greene -- accepted
  Microsteris gracilis (Hook.) Greene -- accepted -- slender phlox
  Microsteris gracilis ssp. humilis (Greene) Brand -- not accepted
  Microsteris gracilis var. gracilis (Hook.) Greene -- accepted -- slender phlox
  Microsteris humilis Greene -- not accepted
  Microsteris micrantha (Kellogg) Greene -- not accepted
  Mimetanthe Greene -- not accepted
  Mimetanthe pilosa (Benth.) Greene -- not accepted -- false monkey-flower, false monkeyflower
  Mimulus acutidens Greene -- accepted -- Kings River monkeyflower
  Mimulus androsaceus Curran ex Greene -- accepted -- rockjasmine monkeyflower
  Mimulus angustifolius (Greene) A.L. Grant -- accepted -- Mount Rose monkeyflower, Mt. Rose monkeyflower
  Mimulus arvensis Greene -- not accepted
  Mimulus austiniae (Greene) A.L. Grant -- not accepted
  Mimulus barbatus Greene -- accepted -- bearded monkeyflower
  Mimulus breweri (Greene) Coville -- accepted -- Brewer's monkeyflower
  Mimulus caespitosus (Greene) Greene -- not accepted
  Mimulus caespitosus var. implexus (Greene) M. Peck -- not accepted
  Mimulus cardinalis var. exsul Greene -- not accepted
  Mimulus cardinalis var. griseus Greene -- not accepted
  Mimulus cardinalis var. rigens Greene -- not accepted
  Mimulus cardinalis var. verbenaceus (Greene) Kearney & Peebles -- not accepted
  Mimulus clementinus Greene -- not accepted
  Mimulus corallinus Greene -- not accepted
  Mimulus cordatus Greene -- not accepted
  Mimulus cusickii (Greene) Rattan -- accepted -- Cusick's monkeyflower
  Mimulus cuspidata Greene -- not accepted
  Mimulus equinnus Greene -- not accepted
  Mimulus equinus Greene -- not accepted
  Mimulus floribundus var. geniculatus (Greene) A.L. Grant -- not accepted
  Mimulus geniculatus Greene -- not accepted
  Mimulus glareosus Greene -- not accepted
  Mimulus glaucescens Greene -- accepted -- shieldbract monkeyflower
  Mimulus grandis (Greene) A. Heller -- not accepted
  Mimulus guttatus ssp. arvensis (Greene) Munz -- not accepted
  Mimulus guttatus var. arvensis (Greene) A.L. Grant -- not accepted
  Mimulus guttatus var. glaucescens (Greene) Jeps. -- not accepted
  Mimulus guttatus var. grandis Greene -- not accepted
  Mimulus guttatus var. hallii (Greene) A.L. Grant -- not accepted
  Mimulus guttatus var. insignis Greene -- not accepted
  Mimulus guttatus var. nasutus (Greene) Jeps. -- not accepted
  Mimulus guttatus var. puberulus (Greene) A.L. Grant -- not accepted
  Mimulus hallii Greene -- not accepted
  Mimulus implexus Greene -- not accepted
  Mimulus implicatus Greene -- not accepted
  Mimulus inamoenus Greene -- not accepted
  Mimulus inconspicuus var. acutidens (Greene) A. Gray -- not accepted
  Mimulus inodorus Greene -- not accepted
  Mimulus kelloggii (Curran ex Greene) Curran ex A. Gray -- accepted -- Kellogg's monkeyflower
  Mimulus langsdorffii Donn ex Greene -- not accepted
  Mimulus langsdorffii var. argutus Greene -- not accepted
  Mimulus langsdorffii var. arvensis (Greene) Jeps. -- not accepted
  Mimulus langsdorffii var. grandis (Greene) Greene -- not accepted
  Mimulus langsdorffii var. insignis (Greene) Greene -- not accepted
  Mimulus langsdorffii var. nasutus (Greene) Jeps. -- not accepted
  Mimulus langsdorffii var. platyphyllus Greene -- not accepted
  Mimulus langsdorffii var. tilingii (Regel) Greene -- not accepted
  Mimulus langsdorfi Donn ex Greene -- not accepted
  Mimulus langsdorfii Donn ex Greene -- not accepted
  Mimulus langsdorfii var. argutus Greene -- not accepted
  Mimulus langsdorfii var. arvensis (Greene) Jeps. -- not accepted
  Mimulus langsdorfii var. grandis (Greene) Greene -- not accepted
  Mimulus langsdorfii var. insignis (Greene) Greene -- not accepted
  Mimulus langsdorfii var. nasutus (Greene) Jeps. -- not accepted
  Mimulus langsdorfii var. platyphyllus Greene -- not accepted
  Mimulus langsdorfii var. tilingii (Regel) Greene -- not accepted
  Mimulus latidens (A. Gray) Greene -- accepted -- broadtooth monkeyflower
  Mimulus layneae (Greene) Jeps. -- accepted -- Layne's monkeyflower
  Mimulus longulus Greene -- not accepted
  Mimulus lucens Greene -- not accepted
  Mimulus marmoratus Greene -- not accepted
  Mimulus mephiticus Greene -- accepted -- foul odor monkeyflower, foul-odor monkeyflower
  Mimulus minthodes Greene -- not accepted
  Mimulus minusculus Greene -- not accepted
  Mimulus moniliformis Greene -- not accepted
  Mimulus moschatus var. moniliformis (Greene) Munz -- accepted -- muskflower
  Mimulus nasutus Greene -- not accepted
  Mimulus nudatus Curran ex Greene -- accepted -- bare monkeyflower
  Mimulus palmeri var. androsaceus (Curran ex Greene) A. Gray -- not accepted
  Mimulus paniculatus Greene -- not accepted
  Mimulus parishii Greene -- accepted -- Parish's monkeyflower
  Mimulus parviflorus (Greene) A.L. Grant -- not accepted
  Mimulus petiolaris Greene -- not accepted
  Mimulus pictus (Curran ex Greene) A. Gray -- accepted -- calico monkeyflower
  Mimulus pilosellus Greene -- not accepted
  Mimulus primuloides var. pilosellus (Greene) Smiley -- not accepted
  Mimulus prionophyllus Greene -- not accepted
  Mimulus procerus Greene -- not accepted
  Mimulus puberulus Greene -- not accepted
  Mimulus pulchellus (Drew ex Greene) A.L. Grant -- accepted -- yellowlip pansy monkeyflower
  Mimulus ringens var. minthodes (Greene) A.L. Grant -- not accepted
  Mimulus rubellus var. breweri (Greene) Jeps. -- not accepted
  Mimulus scouleri var. caespitosus Greene -- not accepted
  Mimulus subreniformis Greene -- not accepted
  Mimulus tilingii var. caespitosus (Greene) A.L. Grant -- accepted -- subalpine monkeyflower
  Mimulus tilingii var. corallinus (Greene) A.L. Grant -- not accepted
  Mimulus verbenaceus Greene -- not accepted -- crimson monkey-flower, crimson monkeyflower
  Mimulus veronicifolius Greene -- not accepted
  Mirabilis aspera Greene -- not accepted
  Mirabilis bigelovii var. aspera (Greene) Munz -- not accepted
  Mirabilis froebelii (Behr) Greene -- not accepted
  Mirabilis rotundifolia (Greene) Standl. -- accepted -- roundleaf four o'clock, roundleaf four-o'clock
  Mitella diversifolia Greene -- accepted -- angleleaf miterwort
  Mitella ovalis Greene -- accepted -- coastal miterwort, oval-leaf miterwort
  Monardella discolor Greene -- not accepted
  Monardella excilis (A. Gray) Greene -- not accepted
  Monardella exilis (A. Gray) Greene -- accepted -- desert monardella
  Monardella exilis var. exilis (A. Gray) Greene -- not accepted
  Monardella glauca Greene -- accepted -- blue monardella, gray monardella, pale monardella
  Monardella linoides ssp. oblonga (Greene) Abrams -- accepted -- flax-like monardella, flaxleaf monardella
  Monardella linoides ssp. viminea (Greene) Abrams -- accepted -- willowy monardella
  Monardella neglecta Greene -- not accepted
  Monardella odoratissima ssp. discolor (Greene) Epling -- accepted -- mountain monardella
  Monardella odoratissima ssp. glauca (Greene) Epling -- not accepted
  Monardella odoratissima ssp. parvifolia (Greene) Epling -- not accepted
  Monardella odoratissima var. discolor (Greene) H. St. John -- not accepted
  Monardella odoratissima var. glauca (Greene) H. St. John -- not accepted
  Monardella odoratissima var. ovata (Greene) Jeps. -- not accepted
  Monardella odoratissima var. parvifolia (Greene) Jeps. -- not accepted
  Monardella villosa ssp. globosa (Greene) Jokerst -- accepted -- robust coyote mint
  Monardella villosa ssp. neglecta (Greene) Epling -- not accepted
  Monardella villosa ssp. subserrata (Greene) Epling -- not accepted
  Monardella viminea Greene -- accepted -- willowy monardella
  Monolepis nuttalliana (Schult.) Greene -- accepted -- Nuttall's monolepis, Nuttall's poverty-weed, Nuttall's povertyweed, patata, patota
  Montia chamissoi (Ledeb. ex Spreng.) Greene -- accepted -- toadlily, water Indianlettuce, water miner's lettuce, water minerslettuce
  Montia diffusa (Nutt.) Greene -- accepted -- spreading minerslettuce
  Montia hallii (A. Gray) Greene -- not accepted
  Montia linearis (Douglas ex Hook.) Greene -- accepted -- narrowleaf Indianlettuce, narrowleaf minerslettuce
  Montia parvifolia (Moc. ex DC.) Greene -- accepted -- littleleaf minerslettuce
  Montia parvifolia ssp. parvifolia (Moc. ex DC.) Greene -- not accepted -- littleleaf minerslettuce
  Montia perfoliata var. nubigena (Greene) Jeps. -- not accepted
  Morus confinis Greene -- not accepted
  Morus crataegifolia Greene -- not accepted
  Morus grisea Greene -- not accepted
  Morus radulina Greene -- not accepted
  Muilla coronata Greene -- accepted -- crowned muilla
  Muilla serotina Greene -- not accepted
  Muilla transmontana Greene -- accepted -- inland muilla
  Myosurus alopecuroides Greene -- not accepted
  Myosurus minimus ssp. apus (Greene) G.R. Campb. -- not accepted -- little mousetail
  Myosurus minimus ssp. apus (Greene) G.R. Campb. -- not accepted -- tiny mousetail
  Myosurus minimus ssp. apus var. apus Greene -- not accepted -- tiny mousetail
  Myosurus minimus ssp. apus var. filiformis Greene -- not accepted -- tiny mousetail
  Myosurus minimus ssp. major (Greene) G.R. Campb. -- not accepted -- tiny mousetail
  Myosurus minimus ssp. major var. major (Greene) K.C. Davis -- not accepted -- tiny mousetail
  Myosurus minimus var. apus Greene -- not accepted
  Myosurus minimus var. filiformis Greene -- not accepted
  Myosurus minimus var. major (Greene) K.C. Davis -- not accepted
  Myosurus minumus ssp. apus (Greene) G.R. Campb. -- not accepted
  Myosurus minumus ssp. major (Greene) G.R. Campb. -- not accepted
  Myosurus minumus var. apus Greene -- not accepted
  Nardosmia vitifolia (Greene) A. Löve & D. Löve -- not accepted
  Nasturtium occidentale Greene -- not accepted
  Navarretia breweri (A. Gray) Greene -- accepted -- Brewer's navarretia, yellow navarretia, yellow pincushion-plant
  Navarretia divaricata (Torr. ex A. Gray) Greene -- accepted -- divaricate navarretia, mountain navarretia
  Navarretia divaricata ssp. divaricata (Torr. ex A. Gray) Greene -- accepted -- divaricate navarretia
  Navarretia filicaulis (Torr. ex A. Gray) Greene -- accepted -- threadstem pincushionplant
  Navarretia hamata Greene -- accepted -- hooked pincushionplant
  Navarretia hamata ssp. foliacea (Greene) H. Mason -- not accepted
  Navarretia hamata ssp. hamata Greene -- accepted -- hooked pincushionplant
  Navarretia hamata ssp. leptantha (Greene) H. Mason -- accepted -- hooked pincushionplant
  Navarretia hamata var. foliacea (Greene) Thorne -- not accepted
  Navarretia heterodoxa (Greene) Greene -- accepted -- Calistoga pincushionplant
  Navarretia heterodoxa var. heterodoxa (Greene) Greene -- not accepted
  Navarretia mellita Greene -- accepted -- honeyscented pincushionplant
  Navarretia mitracarpa Greene -- accepted -- mitrefruit pincushionplant
  Navarretia mitracarpa Greene -- not accepted
  Navarretia mitracarpa var. mitracarpa Greene -- not accepted
  Navarretia nigelliformis Greene -- accepted -- adobe navarretia
  Navarretia nigelliformis ssp. nigelliformis Greene -- accepted -- adobe navarretia
  Navarretia peninsularis Greene -- accepted -- Baja pincushionplant
  Navarretia prolifera Greene -- accepted -- bur pincushionplant, burr pincushionplant
  Navarretia prolifera ssp. prolifera Greene -- accepted -- bur pincushionplant, burr pincushionplant
  Navarretia prostrata (A. Gray) Greene -- accepted -- prostrate pincushionplant
  Navarretia subuligera Greene -- accepted -- awl-leaf pincushionplant
  Navarretia tagetina Greene -- accepted -- marigold pincushionplant
  Navarretia tagetina var. purpurea (Greene) Nason -- not accepted
  Navarretia tagetina var. tagetina Greene -- not accepted
  Navarretia viscidula ssp. purpurea (Greene) H. Mason -- accepted -- sticky pincushionplant
  Nemacladus capillaris Greene -- accepted -- common threadplant
  Nemacladus montanus Greene -- accepted -- mountain threadplant
  Nemacladus pinnatifidus Greene -- accepted -- combleaf threadplant
  Nemacladus rubescens Greene -- accepted -- desert threadplant
  Nemacladus rubescens var. rubescens Greene -- not accepted -- desert threadplant
  Neobeckia Greene -- not accepted -- lakecress, Neobeckia
  Neobeckia aquatica (Eaton) Greene -- not accepted -- lakecress, Neobeckia aquatica
  Neogaerrhinum kelloggii (Greene) Thieret -- not accepted
  Neoholmgrenia hilgardii (Greene) W.L. Wagner & Hoch -- accepted -- Hilgard's suncup
  Nerisyrenia Greene -- accepted -- fanmustard
  Nerisyrenia camporum (A. Gray) Greene -- accepted -- bicolor fanmustard, mesa greggia
  Nerisyrenia linearifolia (S. Watson) Greene -- accepted -- White Sands fanmustard
  Newberrya pumila (Greene) Small -- not accepted
  Nothocalais (A. Gray) Greene -- accepted -- nothocalais, prairie-dandelion
  Nothocalais cuspidata (Pursh) Greene -- accepted -- microseris, sharppoint microseris, sharppoint prairie-dandelion, wavy-leaf prairie-dandelion
  Nothocalais troximoides (A. Gray) Greene -- accepted -- false agoseris, weevil prairie-dandelion
  Nuttallia chrysantha (Engelm. ex Brandegee) Greene -- not accepted
  Nuttallia decapetala (Pursh ex Sims) Greene -- not accepted
  Nuttallia densa (Greene) Greene -- not accepted
  Nuttallia laevicaulis (Hook.) Greene -- not accepted
  Nuttallia multiflora (Nutt.) Greene -- not accepted
  Nuttallia nuda (Pursh) Greene -- not accepted
  Nuttallia pterosperma (Eastw.) Greene -- not accepted
  Nuttallia speciosa (Osterh.) Greene -- not accepted
  Nuttallia stricta (Osterh.) Greene -- not accepted
  Nymphaea polysepala (Engelm.) Greene -- not accepted
  Nymphaea rubrodisca (Morong) Greene -- not accepted
  Oclemena Greene -- accepted -- aster
  Oclemena acuminata (Michx.) Greene -- accepted -- whorled wood aster
  Oclemena nemoralis (Aiton) Greene -- accepted -- bog aster
  Odostemon pumilus (Greene) A. Heller -- not accepted
  Oenothera andina var. hilgardii (Greene) Munz -- not accepted
  Oenothera californica (Nutt. ex Torr. & A. Gray) Greene -- not accepted -- California eveningprimrose
  Oenothera campestris Greene -- not accepted
  Oenothera cheiranthifolia var. nitida (Greene) Munz -- not accepted
  Oenothera contorta var. epilobioides (Greene) Munz -- not accepted
  Oenothera contorta var. hilgardii (Greene) Munz -- not accepted
  Oenothera decorticans (Hook. & Arn.) Greene -- not accepted
  Oenothera dentata var. campestris (Greene) Jeps. -- not accepted
  Oenothera depressa Greene -- not accepted
  Oenothera hilgardii Greene -- not accepted
  Oenothera hirtella Greene -- not accepted
  Oenothera leptocarpa Greene -- not accepted
  Oonopsis (Nutt.) Greene -- accepted -- false goldenweed
  Oonopsis engelmannii (A. Gray) Greene -- accepted -- Engelmann's false goldenweed
  Oonopsis foliosa (A. Gray) Greene -- accepted -- leafy false goldenweed
  Oonopsis foliosa var. foliosa (A. Gray) Greene -- accepted -- leafy false goldenweed
  Oonopsis multicaulis (Nutt.) Greene -- accepted -- branched false goldenweed
  Oonopsis wardii (A. Gray) Greene -- accepted -- Ward's false goldenweed
  Oreastrum elatum Greene -- not accepted
  Oreocarya abortiva Greene -- not accepted
  Oreocarya bakeri Greene -- not accepted
  Oreocarya confertiflora Greene -- not accepted
  Oreocarya fulvocanescens (S. Watson) Greene -- not accepted
  Oreocarya glomerata (Pursh) Greene -- not accepted
  Oreocarya humilis (A. Gray) Greene -- not accepted
  Oreocarya leucophaea (Douglas ex Lehm.) Greene -- not accepted
  Oreocarya nitida Greene -- not accepted
  Oreocarya nubigena Greene -- not accepted
  Oreocarya sericea (A. Gray) Greene -- not accepted
  Oreocarya suffruticosa (Torr.) Greene -- not accepted
  Oreocarya thyrsiflora Greene -- not accepted
  Oreocarya virgata (Porter) Greene -- not accepted
  Oreostemma Greene -- accepted -- aster, oreostemma
  Oreostemma alpigenum (Torr. & A. Gray) Greene -- accepted -- alpine aster, tundra aster
  Oreostemma alpigenum var. alpigenum (Torr. & A. Gray) Greene -- accepted -- tundra aster
  Oreostemma elatum (Greene) Greene -- accepted -- Plumas alpine aster
  Orobanche uniflora ssp. occidentalis (Greene) Abrams ex Ferris -- not accepted
  Orobanche uniflora var. occidentalis (Greene) Roy L. Taylor & MacBryde -- not accepted
  Orthocarpus cuspidatus Greene -- accepted -- Siskiyou Mountain owlclover, toothed owl's-clover
  Orthocarpus cuspidatus ssp. cuspidatus Greene -- accepted -- Siskiyou Mountain owl's-clover
  Orthocarpus erianthus var. micranthus (Greene ex A. Heller) Jeps. -- not accepted
  Orthocarpus micranthus Greene ex A. Heller -- not accepted
  Osmanthus americanus var. megacarpus (Small) P.S. Greene -- accepted -- devilwood
  Osmaronia cerasiformis (Torr. & A. Gray ex Hook. & Arn.) Greene -- not accepted
  Osmaronia cerasiformis var. lancifolia Greene -- not accepted
  Oxybaphus rotundifolius (Greene) Standl. -- not accepted
  Oxytheca hirtiflora (A. Gray ex S. Watson) Greene -- not accepted
  Oxytheca spergulina (A. Gray) Greene -- not accepted
  Oxytheca spergulinum (A. Gray) Greene -- not accepted
  Oxytropis besseyi var. ventosa (Greene) Barneby -- accepted -- Bessey's locoweed
  Oxytropis borealis var. hudsonica (Greene) S.L. Welsh -- accepted -- boreal locoweed
  Oxytropis bryophila (Greene) Jurtzev -- not accepted
  Oxytropis campestris var. cervinus (Greene) B. Boivin -- not accepted
  Oxytropis hudsonica (Greene) Fernald -- not accepted
  Oxytropis lambertii var. articulata (Greene) Barneby -- accepted -- purple locoweed
  Oxytropis luteola (Greene) Piper & Beattie -- not accepted
  Oxytropis macounii (Greene) Dayton -- not accepted
  Oxytropis nana var. ventosa (Greene) Isely -- not accepted -- Wyoming locoweed
  Oxytropis nigrescens ssp. bryophila (Greene) Hultén -- not accepted
  Oxytropis viscida var. hudsonica (Greene) Barneby -- not accepted -- oxytropis visqueux variété de l'Hudsonie
  Ozomelis diversifolia (Greene) Rydb. -- not accepted
  Packera actinella (Greene) W.A. Weber & A. Löve -- not accepted
  Packera bernardina (Greene) W.A. Weber & Á. Löve -- accepted -- San Bernardino ragwort
  Packera cardamine (Greene) W.A. Weber & Á. Löve -- accepted -- bittercress ragwort
  Packera clevelandii (Greene) W.A. Weber & Á. Löve -- accepted -- Cleveland's ragwort
  Packera cynthioides (Greene) W.A. Weber & Á. Löve -- accepted -- White Mountain ragwort
  Packera dimorphophylla (Greene) W.A. Weber & Á. Löve -- accepted -- splitleaf groundsel
  Packera dimorphophylla ssp. dimorphophylla (Greene) W.A. Weber & Á. Löve -- not accepted -- splitleaf groundsel
  Packera dimorphophylla var. dimorphophylla (Greene) W.A. Weber & Á. Löve -- accepted -- splitleaf groundsel
  Packera franciscana (Greene) W.A. Weber & Á. Löve -- accepted -- San Francisco Peaks ragwort
  Packera hesperia (Greene) W.A. Weber & Á. Löve -- accepted -- western ragwort
  Packera indecora (Greene) Á. Löve & D. Löve -- accepted -- elegant groundsel
  Packera ionophylla (Greene) W.A. Weber & Á. Löve -- accepted -- Tehachapi ragwort
  Packera layneae (Greene) W.A. Weber & Á. Löve -- accepted -- Layne's ragwort
  Packera macounii (Greene) W.A. Weber & Á. Löve -- accepted -- Siskiyou Mountain ragwort
  Packera neomexicana var. metcalfei (Greene) D.K. Trock & T.M. Barkley -- not accepted -- Metcalf's groundsel
  Packera neomexicana var. mutabilis (Greene) W.A. Weber & Á. Löve -- accepted -- Metcalf's groundsel, New Mexico groundsel
  Packera neomexicana var. toumeyi (Greene) D.K. Trock & T.M. Barkley -- accepted -- Toumey's groundsel
  Packera porteri (Greene) C. Jeffrey -- accepted -- Porter's groundsel
  Packera pseudaurea ssp. flavula (Greene) W.A. Weber & Á. Löve -- not accepted
  Packera pseudaurea var. flavula (Greene) D.K. Trock & T.M. Barkley -- accepted -- falsegold groundsel
  Packera quaerens (Greene) W.A. Weber & Á. Löve -- not accepted -- Mogollon Mountain ragwort
  Packera quercetorum (Greene) C. Jeffrey -- accepted -- Oak Creek ragwort
  Packera streptanthifolia (Greene) W.A. Weber & Á. Löve -- accepted -- cleftleaf groundsel, Rocky Mountain groundsel
  Packera streptanthifolia var. rubricaulis (Greene) Dorn -- not accepted
  Packera streptanthifolia var. streptanthifolia (Greene) W.A. Weber & Á. Löve -- not accepted
  Papaver lemmonii Greene -- not accepted
  Papaver macounii Greene -- accepted -- Macoun's poppy
  Papaver macounii ssp. macounii Greene -- accepted -- Macoun's poppy
  Parmena Greene -- not accepted
  Parnassia californica (A. Gray) Greene -- not accepted -- California grass of Parnassus, California grass-of-Parnassus
  Pectiantia ovalis (Greene) Rydb. -- not accepted
  Pectis rusbyi Greene ex A. Gray -- accepted -- Rusby's chinchweed, Rusby's cinchweed
  Pedicularis angustissima Greene -- not accepted
  Pedicularis mogollonica Greene -- not accepted
  Pedicularis parryi ssp. mogollonica (Greene) G.D. Carr -- accepted -- Mogollon lousewort
  Pedicularis parryi var. mogollonica (Greene) Dorn -- not accepted
  Penstemon albertinus Greene -- accepted -- Alberta beardtongue
  Penstemon arenarius Greene -- accepted -- Nevada sanddune beardtongue, sanddune penstemon
  Penstemon attenuatus ssp. militaris (Greene) D.D. Keck -- not accepted
  Penstemon attenuatus var. militaris (Greene) Cronquist -- accepted -- South Idaho penstemon
  Penstemon cinerascens Greene ex C.F. Baker -- not accepted
  Penstemon crandallii ssp. procumbens (Greene) D.D. Keck -- accepted -- Crandall's beardtongue
  Penstemon davidsonii Greene -- accepted -- Davidson's penstemon, timberline penstemon
  Penstemon davidsonii var. davidsonii Greene -- accepted -- Davidson's penstemon
  Penstemon fruticosus (Pursh) Greene -- accepted -- bush penstemon
  Penstemon fruticosus var. fruticosus (Pursh) Greene -- accepted -- bush penstemon
  Penstemon gormanii Greene -- accepted -- Gorman's beardtongue
  Penstemon heterodoxus ssp. cephalophorus (Greene) D.D. Keck -- not accepted
  Penstemon heterodoxus var. cephalophorus (Greene) N.H. Holmgren -- accepted -- Sierra beardtongue
  Penstemon laetus ssp. leptosepalus (Greene ex A. Gray) D.D. Keck -- not accepted -- mountain blue penstemon
  Penstemon laetus var. leptosepalus Greene ex A. Gray -- accepted
  Penstemon menziesii ssp. davidsonii (Greene) Piper -- not accepted
  Penstemon modestus Greene -- not accepted
  Penstemon montanus Greene -- accepted -- cordroot beardtongue
  Penstemon montanus var. montanus Greene -- accepted -- cordroot beardtongue
  Penstemon newberryi ssp. sonomensis (Greene) D.D. Keck -- not accepted -- Sonoma penstemon
  Penstemon newberryi var. sonomensis (Greene) Jeps. -- accepted -- Sonoma penstemon
  Penstemon oreocharis Greene -- not accepted
  Penstemon pauciflorus auct. non Greene -- not accepted
  Penstemon pinifolius Greene -- accepted -- pineneedle beardtongue, pineneedle penstemon
  Penstemon pratensis Greene -- accepted -- western whiteflower beardtongue, western whiteflower penstemon
  Penstemon procerus ssp. modestus (Greene) D.D. Keck -- not accepted
  Penstemon procerus var. modestus (Greene) N.H. Holmgren -- accepted -- pincushion beardtongue, pincushion penstemon
  Penstemon rattanii ssp. kleei (Greene) D.D. Keck -- not accepted -- Santa Cruz Mountains beardtongue
  Penstemon rattanii var. kleei (Greene) A. Gray -- accepted
  Penstemon rydbergii var. oreocharis (Greene) N.H. Holmgren -- accepted -- herbaceous penstemon
  Penstemon teucrioides Greene -- accepted -- germander beardtongue
  Penstemon vaseyanus Greene -- not accepted
  Pentachaeta alsinoides Greene -- accepted -- tiny pygmydaisy
  Pentachaeta aphantochaeta (A. Gray) Greene -- not accepted
  Pentachaeta bellidiflora Greene -- accepted -- white-rayed pentachaeta, whiteray pygmydaisy
  Pentachaeta paleacea Greene -- not accepted
  Perityle ambrosiifolia Greene ex A. Powell & S.C. Yarborough -- accepted -- lace-leaved rockdaisy
  Perityle cernua (Greene) Shinners -- accepted -- nodding rockdaisy, Organ Mountain rockdaisy
  Persicaria careyi (Olney) Greene -- accepted -- Carey's smartweed
  Persicaria coccinea (Muhl. ex Willd.) Greene -- not accepted
  Persicaria mesochora Greene -- not accepted
  Persicaria nebraskensis Greene -- not accepted
  Petalonyx linearis Greene -- accepted -- narrow-leaf sandpaper plant, narrowleaf sandpaper plant
  Petasites frigidus ssp. nivalis (Greene) Cody -- not accepted
  Petasites frigidus var. nivalis (Greene) Cronquist -- not accepted -- arctic sweet coltsfoot
  Petasites frigidus var. vitifolius (Greene) Chern. -- accepted
  Petasites nivalis Greene -- not accepted
  Petasites nivalis ssp. vitifolius (Greene) Toman -- not accepted
  Petasites trigonophylla Greene -- not accepted
  Petasites X vitifolius Greene (pro sp.) -- not accepted -- sweet coltsfoot
  Petradoria Greene -- accepted -- rock goldenrod, rockgoldenrod
  Petradoria pumila (Nutt.) Greene -- accepted -- grassy rockgoldenrod, rock goldenrod
  Petradoria pumila ssp. pumila (Nutt.) Greene -- accepted -- grassy rock goldenrod, grassy rockgoldenrod
  Phacelia caerulea Greene -- not accepted -- skyblue phacelia
  Phacelia californica var. bernardina (Greene) Jeps. -- not accepted
  Phacelia cicutaria Greene -- accepted -- caterpillar phacelia
  Phacelia cicutaria var. cicutaria Greene -- accepted -- caterpillar phacelia
  Phacelia coerulea Greene -- accepted -- skyblue phacelia, skyblue scorpionweed
  Phacelia congdonii Greene -- accepted -- Congdon's phacelia
  Phacelia congesta var. rupestris (Greene) J.F. Macbr. -- not accepted
  Phacelia cryptantha Greene -- accepted -- hidden-flower scorpion-weed, hiddenflower phacelia, limestone phacelia
  Phacelia dasyphylla Greene ex J.F. Macbr. -- not accepted
  Phacelia divaricata var. congdonii (Greene) Munz -- not accepted
  Phacelia egena (Greene ex Brand) Greene ex J.T. Howell -- accepted -- Kaweah River phacelia, Kaweah river scorpion-weed
  Phacelia eremophila Greene -- not accepted
  Phacelia floribunda Greene -- accepted -- southern island phacelia
  Phacelia frigida Greene -- not accepted
  Phacelia frigida ssp. dasyphylla (Greene ex J.F. Macbr.) Heckard -- not accepted
  Phacelia frigida ssp. frigida Greene -- not accepted -- cold phacelia
  Phacelia hastata var. dasyphylla (Greene ex J.F. Macbr.) Kartesz & Gandhi -- accepted -- spearshaped phacelia
  Phacelia heterophylla ssp. virgata (Greene) Heckard -- accepted -- varileaf phacelia
  Phacelia heterophylla var. dasyphylla Greene ex J.F. Macbr. -- not accepted
  Phacelia heterophylla var. virgata (Greene) Dorn -- not accepted
  Phacelia heterophyllum var. virgata (Greene) Heckard -- not accepted
  Phacelia imbricata Greene -- accepted -- imbricate phacelia
  Phacelia imbricata ssp. bernardina (Greene) Heckard -- not accepted
  Phacelia imbricata ssp. imbricata Greene -- accepted -- imbricate phacelia
  Phacelia inconspicua Greene -- accepted -- hidden phacelia, obscure phacelia
  Phacelia mutabilis Greene -- accepted -- changeable phacelia
  Phacelia nemoralis Greene -- accepted -- shade phacelia
  Phacelia nemoralis ssp. nemoralis Greene -- accepted -- shade phacelia
  Phacelia ramosissima var. eremophila (Greene) J.F. Macbr. -- accepted -- branching phacelia
  Phacelia rupestris Greene -- accepted -- rock phacelia, rock scorpion-weed, rock scorpionweed
  Phacelia suaveolens Greene -- accepted -- sweetscented phacelia
  Phacelia suaveolens ssp. suaveolens Greene -- accepted -- sweetscented phacelia
  Phacelia suaveolens var. suaveolens Greene -- not accepted
  Phacelia thermalis Greene -- accepted -- heated phacelia
  Phacelia umbrosa Greene -- accepted -- Colorado Desert phacelia
  Phaseolus parvulus Greene -- accepted -- Pinos Altos Mountain bean
  Phemeranthus confertiflorus (Greene) Hershk. -- not accepted -- New Mexico fameflower
  Phemeranthus humilis (Greene) Kiger -- accepted -- Pinos Altos fameflower
  Phemeranthus marginatus (Greene) Kiger -- accepted -- tepic fameflower
  Phemeranthus validulus (Greene) Kiger -- accepted -- Tusayan fameflower
  Phlox alyssifolia Greene -- accepted -- alyssum-leaf phlox, alyssumleaf phlox
  Phlox alyssifolia ssp. alyssifolia Greene -- accepted -- alyssumleaf phlox
  Phlox gracilis (Hook.) Greene -- not accepted -- slender phlox
  Phlox gracilis ssp. gracilis (Hook.) Greene -- not accepted -- pink microsteris, slender phlox
  Phlox gracilis ssp. humilis (Greene) H. Mason -- not accepted -- dwarf phlox, slender phlox
  Phlox mesoleuca Greene -- accepted -- threadleaf phlox
  Pholisma depressum Greene -- not accepted
  Phyla canescens (Kunth) Greene -- accepted -- carpet-grass, hairy fogfruit, hairy frogfruit
  Phyla cuneifolia (Torr.) Greene -- accepted -- fogfruit, wedgeleaf, wedgeleaf fogfruit
  Phyla lanceolata (Michx.) Greene -- accepted -- frog fruit, lanceleaf fogfruit, lanceleaf frog fruit, lanceleaf frogfruit, northern fogfruit
  Phyla nodiflora (L.) Greene -- accepted -- frog fruit, sawtooth fogfruit, turkey tangle, turkey tangle fogfruit, turkey tangle frogfruit
  Phyla nodiflora var. nodiflora (L.) Greene -- not accepted
  Phymosia remota (Greene) Britton -- not accepted
  Physalis virginiana var. polyphylla (Greene) Waterf. -- accepted -- Virginia groundcherry
  Physaria kingii ssp. diversifolia (Greene) O'Kane & Al-Shehbaz -- accepted -- King bladderpod
  Physaria montana (A. Gray) Greene -- accepted -- mountain bladderpod
  Physaria parvula (Greene) O'Kane & Al-Shehbaz -- accepted -- pygmy bladderpod
  Physaria pruinosa (Greene) O'Kane & Al-Shehbaz -- accepted -- Pagosa Springs bladderpod
  Physaria valida (Greene) O'Kane & Al-Shehbaz -- accepted -- strong bladderpod
  Physocarpus malvaceus (Greene) Kuntze -- accepted -- mallow ninebark
  Piperia elongata ssp. michaelii (Greene) Ackerman -- not accepted -- Michael's rein orchid
  Piperia michaeli (Greene) Rydb. -- not accepted
  Piperia michaelii (Greene) Rydb. -- not accepted -- Michael's piperia
  Plagiobothrys arizonicus (A. Gray) Greene ex A. Gray -- accepted -- Arizona popcornflower, bloodweed, lipstick plant
  Plagiobothrys asper Greene -- not accepted
  Plagiobothrys austiniae (Greene) I.M. Johnst. -- accepted -- Austin's popcornflower
  Plagiobothrys californicus (A. Gray) Greene -- not accepted
  Plagiobothrys campestris Greene -- not accepted
  Plagiobothrys chorisianus var. hickmanii (Greene) I.M. Johnst. -- accepted -- Hickman's popcornflower
  Plagiobothrys cognatus (Greene) I.M. Johnst. -- not accepted
  Plagiobothrys cusickii (Greene) I.M. Johnst. -- not accepted
  Plagiobothrys diffusus (Greene) I.M. Johnst. -- not accepted -- San Francisco popcornflower
  Plagiobothrys fulvus var. campestris (Greene) I.M. Johnst. -- accepted -- fulvous popcornflower
  Plagiobothrys harknessii Greene -- not accepted
  Plagiobothrys hirtus (Greene) I.M. Johnst. -- accepted -- rough popcornflower
  Plagiobothrys hispidulus (Greene) I.M. Johnst. -- accepted -- sleeping popcornflower
  Plagiobothrys humistratus (Greene) I.M. Johnst. -- accepted -- dwarf popcornflower
  Plagiobothrys kingii var. harknessii (Greene) Jeps. -- accepted -- Harness' popcornflower
  Plagiobothrys leptocladus (Greene) I.M. Johnst. -- accepted -- alkali popcornflower, finebranched popcornflower, smoothstem popcornflower
  Plagiobothrys lithocaryus (Greene ex A. Gray) I.M. Johnst. -- accepted -- Mayacamas popcornflower
  Plagiobothrys mollis var. vestitus (Greene) I.M. Johnst. -- accepted -- Petaluma popcornflower, soft popcornflower
  Plagiobothrys nelsonii (Greene) I.M. Johnst. -- not accepted
  Plagiobothrys orthocarpus (Greene) I.M. Johnst. -- not accepted
  Plagiobothrys pringlei Greene -- accepted -- Pringle's popcornflower
  Plagiobothrys scopulorum (Greene) I.M. Johnst. -- not accepted
  Plagiobothrys scouleri ssp. penicillatus (Greene) Á. Löve -- not accepted
  Plagiobothrys scouleri var. cusickii (Greene) Higgins -- not accepted -- Cusick's popcornflower
  Plagiobothrys scouleri var. hispidulus (Greene) Dorn -- not accepted -- meadow popcornflower, sleeping popcornflower
  Plagiobothrys scouleri var. penicillatus (Greene) Cronquist -- not accepted
  Plagiobothrys scriptus (Greene) I.M. Johnst. -- accepted -- scribe allocarya, scribe popcornflower
  Plagiobothrys shastensis Greene ex A. Gray -- accepted -- Shasta popcornflower
  Plagiobothrys stipitatus (Greene) I.M. Johnst. -- accepted -- slender popcornflower, stalked popcornflower
  Plagiobothrys stipitatus var. stipitatus (Greene) I.M. Johnst. -- accepted -- stalked popcornflower
  Plagiobothrys strictus (Greene) I.M. Johnst. -- accepted -- Calistoga allocarya, Calistoga popcornflower
  Plagiobothrys tener (Greene) I.M. Johnst. -- accepted -- slender popcornflower
  Plagiobothrys tener var. tener (Greene) I.M. Johnst. -- accepted -- slender popcornflower
  Plagiobothrys torreyi var. diffusus (Greene) I.M. Johnst. -- accepted -- Torrey's popcornflower
  Planodes Greene -- accepted
  Planodes virginica (L.) Greene -- accepted -- Virginia winged rockcress
  Plantago bigelovii ssp. californica (Greene) Bassett -- accepted -- coast plantain
  Plantago californica Greene -- not accepted
  Plantago hookeriana var. californica (Greene) Poe -- not accepted
  Plantago patagonica var. californica Greene -- not accepted
  Plantago shastensis Greene -- not accepted
  Platanthera brevifolia (Greene) Kraenzl. -- accepted -- Platanthera de hoja corta, shortflower bog orchid, shortflowered bog orchid
  Platanthera michaelii (Greene) R.M. Bateman -- accepted
  Platanthera saccata (Greene) Hultén -- not accepted
  Platanthera sparsiflora var. breviflora (Greene) Luer -- not accepted
  Platanthera sparsiflora var. brevifolia (Greene) Luer -- not accepted
  Platanthera unalascensis ssp. maritima (Greene) DeFilipps -- not accepted -- Alaska rein orchid
  Platanthera unalascensis var. maritima (Greene) Correll -- not accepted
  Platystemon arizonicus Greene -- not accepted
  Platystemon californicus var. crinitus Greene -- not accepted
  Platystemon californicus var. horridulus (Greene) Jeps. -- not accepted
  Platystemon californicus var. ornithopus (Greene) Munz -- not accepted
  Platystemon confinis Greene -- not accepted
  Platystemon mohavensis Greene -- not accepted
  Plectritis ciliosa (Greene) Jeps. -- accepted -- long-spur seablush, longspur seablush
  Plectritis ciliosa ssp. ciliosa (Greene) Jeps. -- accepted -- long-spur seablush, longspur seablush
  Plectritis magna (Greene) Suksd. -- not accepted
  Pneumonanthe bigelovii (A. Gray) Greene -- not accepted
  Pneumonanthe calycosa (Griseb.) Greene -- not accepted
  Pneumonanthe parryi (Engelm.) Greene -- not accepted
  Polemonium brandegeei (A. Gray) Greene -- accepted -- Brandegee's Jacob's-ladder
  Polemonium caeruleum ssp. occidentale (Greene) J.F. Davidson -- not accepted
  Polemonium delicatum ssp. scopulinum (Greene) Wherry -- not accepted
  Polemonium elegans Greene -- accepted -- elegant Jacob's-ladder
  Polemonium eximium Greene -- accepted -- skypilot
  Polemonium filicinum Greene -- not accepted
  Polemonium flavum Greene -- not accepted
  Polemonium foliosissimum var. flavum (Greene) Anway -- accepted -- fernleaf polemonium, yellow Jacob's-ladder
  Polemonium foliosissimum var. molle (Greene) Anway -- accepted -- towering Jacob's-ladder
  Polemonium occidentale Greene -- accepted -- western Jacob's-ladder, western polemonium
  Polemonium occidentale ssp. occidentale Greene -- accepted -- western Jacob's-ladder, western polemonium
  Polemonium pectinatum Greene -- accepted -- Washington Jacob's-ladder
  Polycodium floridanum (Nutt.) Greene -- not accepted
  Polycodium stamineum (L.) Greene -- not accepted
  Polyctenium Greene -- accepted -- combleaf
  Polyctenium fremontii (S. Watson) Greene -- accepted -- desert combleaf, Fremont's combleaf
  Polyctenium fremontii var. bisulcatum (Greene) Rollins -- not accepted -- desert combleaf
  Polyctenium fremontii var. fremontii (S. Watson) Greene -- not accepted -- Fremont's combleaf
  Polygala rusbyi Greene -- not accepted -- ruby polygala, Rusby's milkwort
  Polygonum austiniae Greene -- accepted -- Austin's knotweed
  Polygonum cephalophorum Greene -- not accepted
  Polygonum coccineum var. pratincola (Greene) Stanford -- not accepted
  Polygonum douglasii Greene -- accepted -- Douglas' knotweed
  Polygonum douglasii ssp. austiniae (Greene) A.E. Murray -- not accepted -- Austin's knotweed
  Polygonum douglasii ssp. douglasii Greene -- not accepted -- Douglas' knotweed, renouée de Douglas variété de Douglas
  Polygonum douglasii ssp. engelmannii (Greene) Kartesz & Gandhi -- not accepted -- Engelmann's knotweed
  Polygonum douglasii var. austiniae (Greene) M.E. Jones -- not accepted
  Polygonum douglasii var. latifolium (Engelm.) Greene -- not accepted
  Polygonum engelmannii Greene -- accepted -- Engelmann's knotweed
  Polygonum fusiforme Greene -- not accepted -- Needles knotweed
  Polygonum glastifolium Greene -- not accepted
  Polygonum kelloggii Greene -- not accepted
  Polygonum longistylum var. omissum (Greene) Stanford -- not accepted
  Polygonum parryi Greene -- accepted -- Parry's knotweed
  Polygonum polygaloides ssp. kelloggii (Greene) J.C. Hickman -- accepted -- Kellogg's knotweed
  Polygonum vulcanicum Greene -- not accepted
  Porophyllum caesium Greene -- not accepted
  Porophyllum junciforme Greene -- not accepted
  Porophyllum vaseyi Greene -- not accepted
  Potentilla ambigens Greene -- accepted -- silkyleaf cinquefoil
  Potentilla arizonica Greene -- accepted -- Garland Prairie cinquefoil
  Potentilla ashlandica Greene -- not accepted
  Potentilla baileyi (S. Watson) Greene -- not accepted
  Potentilla biennis Greene -- accepted -- biennial cinquefoil
  Potentilla bolanderi (A. Gray) Greene -- not accepted
  Potentilla bolanderi var. clevelandii (Greene) Jeps. -- not accepted
  Potentilla californica (Cham. & Schltdl.) Greene -- not accepted
  Potentilla californica var. elata Greene -- not accepted
  Potentilla californica var. frondosa Greene -- not accepted
  Potentilla clevelandii Greene -- not accepted
  Potentilla daucifolia Greene -- not accepted
  Potentilla douglasii Greene -- not accepted
  Potentilla douglasii var. tenella (S. Watson) Greene -- not accepted -- pinewoods horkelia
  Potentilla frondosa Greene -- not accepted
  Potentilla glandulosa ssp. ashlandica (Greene) D.D. Keck -- not accepted -- Ashland cinquefoil
  Potentilla glandulosa ssp. hansenii (Greene) D.D. Keck -- not accepted -- Hansen's cinquefoil
  Potentilla glandulosa ssp. reflexa (Greene) D.D. Keck -- not accepted -- sticky cinquefoil
  Potentilla glandulosa var. lactea Greene -- not accepted
  Potentilla glandulosa var. reflexa Greene -- not accepted
  Potentilla gordonii (Hook.) Greene -- not accepted
  Potentilla hansenii Greene -- not accepted
  Potentilla howellii Greene -- not accepted
  Potentilla kelloggii (Greene) Greene -- not accepted
  Potentilla kingii (S. Watson) Greene -- not accepted
  Potentilla lemmonii (S. Watson) Greene -- not accepted
  Potentilla lindleyi Greene -- not accepted
  Potentilla micheneri Greene -- not accepted
  Potentilla muirii (A. Gray) Greene -- not accepted
  Potentilla nubigena Greene -- not accepted
  Potentilla parryi (Greene) Greene -- not accepted
  Potentilla pickeringii (Torr. ex A. Gray) Greene -- not accepted
  Potentilla plattensis var. leucophylla Greene -- not accepted
  Potentilla puberula Greene -- not accepted
  Potentilla purpurascens (S. Watson) Greene -- not accepted
  Potentilla reflexa (Greene) Greene -- not accepted
  Potentilla santolinoides (A. Gray) Greene -- not accepted
  Potentilla saxosa Lemmon ex Greene -- not accepted
  Potentilla saxosa var. saxosa Lemmon ex Greene -- not accepted
  Potentilla scopulorum Greene -- not accepted
  Potentilla sericata (S. Watson) Greene -- not accepted
  Potentilla subviscosa Greene -- accepted -- Navajo cinquefoil
  Potentilla subviscosa var. subviscosa Greene -- accepted -- Navajo cinquefoil
  Potentilla tilingii (Regel) Greene -- not accepted
  Potentilla utahensis (S. Watson) Greene -- not accepted
  Potentilla vallicola Greene -- not accepted
  Potentilla webberi (A. Gray) Greene -- not accepted
  Primula clevelandii (Greene) A.R. Mast & Reveal -- accepted -- padre's shootingstar
  Primula clevelandii var. clevelandii (Greene) A.R. Mast & Reveal -- accepted -- padre's shootingstar
  Primula clevelandii var. gracilis (Greene) Mast & Reveal -- accepted -- mission shootingstar, padre's shootingstar
  Primula conjugens (Greene) A.R. Mast & Reveal -- accepted -- Bonneville shootingstar
  Primula conjugens var. conjugens (Greene) A.R. Mast & Reveal -- accepted -- Bonneville shootingstar
  Primula eximia Greene -- not accepted -- arctic primrose
  Primula pauciflora (Greene) A.R. Mast & Reveal -- accepted -- darkthroat shootingstar
  Primula pauciflora var. cusickii (Greene) A.R. Mast & Reveal -- accepted -- Cusick's shootingstar
  Primula pauciflora var. monantha (Greene) A.R. Mast & Reveal -- accepted -- darkthroat shootingstar, Greene's shootingstar
  Primula pauciflora var. pauciflora (Greene) A.R. Mast & Reveal -- accepted -- darkthroat shootingstar, pretty shootingstar
  Primula rusbyi Greene -- accepted -- Rusby's primrose
  Primula tetrandra (Suksd. ex Greene) A.R. Mast & Reveal -- accepted -- alpine shootingstar
  Primula tschuktschorum ssp. eximia (Greene) A.E. Porsild -- not accepted
  Prunus emarginata var. crenulata (Greene) Kearney & Peebles -- not accepted
  Prunus subcordata var. oregana (Greene) M. Peck -- not accepted -- Oregon Klamath plum
  Psedera quinquefolia (L.) Greene -- not accepted
  Pseudognaphalium macounii (Greene) Kartesz -- accepted -- Macoun's cudweed
  Psilochenia bakeri (Greene) W.A. Weber -- not accepted
  Psilochenia modocensis (Greene) W.A. Weber -- not accepted
  Psilostrophe bakeri Greene -- accepted -- Baker's paperflower
  Psilostrophe cooperi (A. Gray) Greene -- accepted -- whitestem paperflower
  Psilostrophe tagetina (Nutt.) Greene -- accepted -- woolly paperflower, wooly paperflower
  Psilostrophe tagetina var. tagetina (Nutt.) Greene -- not accepted -- woolly paperflower, wooly paperflower
  Psoralea douglasii Greene -- not accepted
  Psychrobatia Greene -- not accepted
  Ptelea angustifolia var. cognata (Greene) Kearney & Peebles -- not accepted
  Ptelea crenulata Greene -- accepted -- California hoptree
  Ptelea monticola Greene -- not accepted
  Ptelea pallida Greene -- not accepted
  Ptelea trifoliata ssp. angustifolia var. persicifolia (Greene) V.L. Bailey -- not accepted
  Ptelea trifoliata ssp. pallida (Greene) V.L. Bailey -- accepted -- hoptree, narrowleaf hoptree, pallid hoptree
  Ptelea trifoliata ssp. pallida var. cognata (Greene) Kearney & Peebles -- not accepted -- common hoptree, pallid hoptree
  Ptelea trifoliata ssp. pallida var. confinis (Greene) V.L. Bailey -- not accepted -- common hoptree, pallid hoptree
  Ptelea trifoliata ssp. pallida var. lutescens (Greene) V.L. Bailey -- not accepted -- common hoptree, pallid hoptree
  Ptelea trifoliata ssp. pallida var. pallida (Greene) V.L. Bailey -- not accepted -- pallid hoptree
  Ptelea trifoliata ssp. polyadenia (Greene) V.L. Bailey -- accepted -- common hoptree, pallid hoptree
  Ptelea trifoliata var. cognata (Greene) Kearney & Peebles -- accepted -- pallid hoptree
  Ptelea trifoliata var. confinis (Greene) V.L. Bailey -- accepted -- pallid hoptree
  Ptelea trifoliata var. lutescens (Greene) V.L. Bailey -- accepted -- pallid hoptree
  Ptelea trifoliata var. pallida (Greene) V.L. Bailey -- accepted -- pallid hoptree
  Ptelea trifoliata var. persicifolia (Greene) V.L. Bailey -- accepted -- common hoptree
  Ptilocalais nutans (Hook.) Greene -- not accepted
  Pycnanthemum curvipes (Greene) E. Grant & Epling -- accepted -- Stone Mountain mountainmint, stone mountainmint
  Pyrola pallida Greene -- not accepted
  Pyrola picta ssp. pallida (Greene) Andres -- not accepted
  Pyrola picta var. pallida (Greene) Parish -- not accepted
  Pyrrocoma apargioides (A. Gray) Greene -- accepted -- alpineflames
  Pyrrocoma carthamoides var. subsquarrosa (Greene) G. Brown & Keil -- accepted -- largeflower goldenweed
  Pyrrocoma congesta Greene -- not accepted
  Pyrrocoma crocea (A. Gray) Greene -- accepted -- curlyhead goldenweed
  Pyrrocoma crocea var. crocea (A. Gray) Greene -- accepted -- curlyhead goldenweed
  Pyrrocoma crocea var. genuflexa (Greene) Mayes ex G. Brown & Keil -- accepted -- curlyhead goldenweed
  Pyrrocoma genuflexa Greene -- not accepted
  Pyrrocoma gossypina Greene -- not accepted
  Pyrrocoma hirta (A. Gray) Greene -- accepted -- tacky goldenweed
  Pyrrocoma hirta var. hirta (A. Gray) Greene -- accepted -- sticky goldenweed, tacky goldenweed
  Pyrrocoma hirta var. lanulosa (Greene) Mayes ex G. Brown & Keil -- accepted -- tacky goldenweed
  Pyrrocoma hirta var. sonchifolia (Greene) Kartesz & Gandhi -- accepted -- tacky goldenweed
  Pyrrocoma howellii (A. Gray) Greene -- not accepted
  Pyrrocoma integrifolia (Porter ex A. Gray) Greene -- accepted -- entireleaf goldenweed, many-stemmed goldenweed, manysted goldenweed
  Pyrrocoma lanceolata (Hook.) Greene -- accepted -- lance-leaf goldenweed, lanceleaf goldenweed
  Pyrrocoma lanceolata var. lanceolata (Hook.) Greene -- accepted -- Intermountain goldenweed, lance goldenweed, lanceleaf goldenweed
  Pyrrocoma lanceolata var. subviscosa (Greene) Mayes ex G. Brown & Keil -- accepted -- lanceleaf goldenweed
  Pyrrocoma lanulosa Greene -- not accepted
  Pyrrocoma liatriformis Greene -- accepted -- smallhead goldenweed
  Pyrrocoma racemosa var. congesta (Greene) Mayes ex G. Brown & Keil -- accepted -- clustered goldenweed
  Pyrrocoma racemosa var. sessiliflora (Greene) Mayes ex G. Brown & Keil -- accepted -- clustered goldenweed
  Pyrrocoma radiata var. sessiliflora (Greene) Mayes ex G. Brown and Keil -- not accepted
  Pyrrocoma sessiliflora Greene -- not accepted
  Pyrrocoma sonchifolia Greene -- not accepted
  Pyrrocoma subsquarrosa Greene -- not accepted
  Pyrrocoma subviscosa Greene -- not accepted
  Pyrrocoma uniflora (Hook.) Greene -- accepted -- plantain goldenweed
  Pyrrocoma uniflora var. gossypina (Greene) Kartesz & Gandhi -- accepted -- plantain goldenweed
  Pyrrocoma uniflora var. uniflora (Hook.) Greene -- accepted -- plantain goldenweed, singlehead goldenweed
  Pyrus sitchensis var. californica (Greene) Smiley -- not accepted
  Quercus dumosa var. macdonaldii (Greene & Kellogg) Jeps. -- not accepted
  Quercus dumosa var. turbinella (Greene) Jeps. -- not accepted
  Quercus engelmannii Greene -- accepted -- Engelmann's oak
  Quercus parvula Greene -- not accepted -- coast oak, Santa Cruz Island oak
  Quercus parvula var. parvula Greene -- not accepted -- Santa Cruz Island oak
  Quercus turbinella Greene -- accepted -- scrub oak, shrub live oak, Sonoran scrub oak, turbinella oak
  Quercus turbinella var. turbinella Greene -- not accepted -- shrub live oak
  Quercus venustula Greene -- not accepted
  Quercus X macdonaldii Greene & Kellogg (pro sp.) -- accepted -- MacDonald's oak
  Radicula curvisiliqua (Hook.) Greene -- not accepted
  Radicula obtusa (Nutt.) Greene -- not accepted
  Radicula sessiliflora (Nutt.) Greene -- not accepted
  Radicula sinuata (Nutt.) Greene -- not accepted
  Radicula sphaerocarpa (A. Gray) Greene -- not accepted
  Radicula walteri (Elliott) Greene -- not accepted
  Raillardella pringlei Greene -- accepted -- showy raillardella
  Rainiera Greene -- accepted -- rainiera
  Rainiera stricta (Greene) Greene -- accepted -- false silverback
  Ranunculus affinis var. micropetalus Greene -- not accepted
  Ranunculus alismifolius var. hartwegii (Greene) Jeps. -- accepted -- plantainleaf buttercup
  Ranunculus bongardii Greene -- not accepted
  Ranunculus bongardii var. tenellus (Nutt.) Greene -- not accepted
  Ranunculus californicus var. cuneatus Greene -- accepted
  Ranunculus californicus var. laetus Greene -- not accepted
  Ranunculus californicus var. rugulosus (Greene) L.D. Benson -- not accepted
  Ranunculus canus var. laetus (Greene) L.D. Benson -- not accepted
  Ranunculus canus var. ludovicianus (Greene) L.D. Benson -- accepted
  Ranunculus caricetorum Greene -- not accepted
  Ranunculus earlei Greene -- not accepted
  Ranunculus ellipticus Greene -- not accepted
  Ranunculus eschscholtzii var. eximius (Greene) L.D. Benson -- accepted -- tundra buttercup
  Ranunculus eximius Greene -- not accepted -- tundra buttercup
  Ranunculus fascicularis var. apricus (Greene) Fernald -- not accepted
  Ranunculus flammula var. samolifolius (Greene) L.D. Benson -- not accepted
  Ranunculus glaberrimus var. ellipticus (Greene) Greene -- accepted -- elliptical buttercup, sagebrush buttercup
  Ranunculus gormanii Greene -- accepted -- Gorman's buttercup
  Ranunculus hartwegii Greene -- not accepted
  Ranunculus hispidus var. caricetorum (Greene) T. Duncan -- accepted -- bristly buttercup
  Ranunculus howellii Greene -- not accepted
  Ranunculus hyperboreus ssp. intertextus (Greene) B.M. Kapoor & Á. Löve -- not accepted
  Ranunculus hyperboreus var. intertextus (Greene) B. Boivin -- not accepted
  Ranunculus inamoenus Greene -- accepted -- graceful buttercup
  Ranunculus inamoenus var. inamoenus Greene -- accepted -- graceful buttercup
  Ranunculus intertextus Greene -- not accepted
  Ranunculus ludovicianus Greene -- not accepted
  Ranunculus micranthus var. cymbalistes (Greene) Fernald -- not accepted
  Ranunculus micranthus var. delitescens (Greene) Fernald -- not accepted
  Ranunculus natans var. intertextus (Greene) L.D. Benson -- not accepted
  Ranunculus occidentalis var. brevistylis Greene -- accepted -- western buttercup
  Ranunculus occidentalis var. howellii Greene -- accepted -- western buttercup
  Ranunculus occidentalis var. turneri (Greene) L.D. Benson -- not accepted
  Ranunculus occidentalis var. ultramontanus Greene -- accepted -- western buttercup
  Ranunculus oreogenes Greene -- not accepted -- Oregon buttercup
  Ranunculus populago Greene -- accepted -- popular buttercup
  Ranunculus rugulosus Greene -- not accepted
  Ranunculus septentrionalis var. caricetorum (Greene) Fernald -- not accepted
  Ranunculus turneri Greene -- accepted -- Turner's buttercup
  Ranunculus uncinatus var. earlei (Greene) L.D. Benson -- not accepted -- Earle's buttercup
  Ranunculus usneoides Greene -- not accepted
  Rhamnus betulifolia Greene -- accepted -- birchleaf buckthorn
  Rhamnus betulifolia var. betulifolia Greene -- accepted -- birchleaf buckthorn
  Rhamnus blumeri Greene -- accepted -- Blumer's buckthorn
  Rhamnus californica ssp. cuspidata (Greene) C.B. Wolf -- accepted -- California buckthorn
  Rhamnus californica ssp. ursina (Greene) C.B. Wolf -- accepted -- California buckthorn
  Rhamnus californica var. ursima (Greene) C.B. Wolf -- not accepted
  Rhamnus californica var. ursina (Greene) McMinn -- not accepted
  Rhamnus crocea ssp. pirifolia (Greene) C.B. Wolf -- not accepted
  Rhamnus crocea var. ilicifolia (Kellogg) Greene -- not accepted
  Rhamnus crocea var. pirifolia (Greene) Little -- not accepted
  Rhamnus fasciculata Greene -- not accepted
  Rhamnus insularis Greene -- not accepted
  Rhamnus pirifolia Greene -- accepted -- island redberry
  Rhamnus rubra Greene -- accepted -- red buckthorn
  Rhamnus rubra ssp. obtusissima (Greene) C.B. Wolf -- accepted -- obtuse buckthorn
  Rhamnus rubra ssp. rubra Greene -- accepted -- red buckthorn
  Rhamnus smithi Greene -- not accepted
  Rhamnus smithii Greene -- accepted -- Smith's buckthorn
  Rhamnus smithii ssp. fasciculata (Greene) C.B. Wolf -- not accepted
  Rhamnus tomentella ssp. cuspidata (Greene) Sawyer -- not accepted
  Rhamnus tomentella ssp. ursina (Greene) Sawyer -- not accepted
  Rhinotropis rusbyi (Greene) J.R. Abbott -- accepted
  Rhododendron occidentale var. sonomense (Greene) Rehder -- not accepted -- Sonoma azalea
  Rhododendron sonomense Greene -- not accepted
  Rhus arenaria (Greene) G.N. Jones -- not accepted
  Rhus aromatica ssp. serotina (Greene) R.E. Brooks -- not accepted
  Rhus aromatica var. arenaria (Greene) Fernald -- not accepted -- fragrant sumac
  Rhus aromatica var. illinoensis (Greene) Rehder -- not accepted
  Rhus aromatica var. serotina (Greene) Rehder -- not accepted -- fragrant sumac
  Rhus aromatica var. simplicifolia (Greene) Cronquist -- accepted -- single-leaf skunkbush, skunkbush sumac
  Rhus ashei (Small) Greene -- not accepted -- Ashe's sumac
  Rhus borealis Greene -- not accepted
  Rhus calophylla Greene -- not accepted
  Rhus glabra var. borealis Britton, non Rhus borealis Greene -- not accepted
  Rhus glabra var. cismontana (Greene) Cockerell -- not accepted
  Rhus pulvinata Greene -- not accepted -- northern smooth sumac
  Rhus toxicodendron var. eximia (Greene) McNair -- not accepted
  Rhus trilobata var. anisophylla (Greene) Jeps. -- not accepted -- skunkbush sumac, smoothleaf skunkbush
  Rhus trilobata var. arenaria (Greene) F.A. Barkley -- not accepted
  Rhus trilobata var. malacophylla (Greene) Munz -- not accepted
  Rhus trilobata var. quinata (Greene) Jeps. -- not accepted -- Grand Canyon skunkbush, skunkbush sumac
  Rhus trilobata var. racemulosa (Greene) F.A. Barkley -- not accepted -- skunkbush sumac, summer skunkbush
  Rhus trilobata var. serotina (Greene) F.A. Barkley -- not accepted
  Rhus trilobata var. simplicifolia (Greene) F.A. Barkley -- not accepted -- single-leaf skunkbush, skunkbush sumac
  Rhus X ashei (Small) Greene (pro. sp.) -- accepted
  Rhus X pulvinata Greene (pro. sp.) -- accepted -- pulvinate sumac
  Ribes amictum Greene -- not accepted
  Ribes aridum Greene -- not accepted
  Ribes cognatum Greene -- not accepted
  Ribes cruentum Greene -- not accepted -- shinyleaf currant
  Ribes cruentum var. cruentum Greene -- not accepted -- shinyleaf currant
  Ribes deductum Greene -- not accepted
  Ribes glutinosum var. melanocarpum Greene -- not accepted
  Ribes howellii Greene -- not accepted
  Ribes lasianthum Greene -- accepted -- alpine gooseberry
  Ribes leptanthum var. lasianthum (Greene) Jeps. -- not accepted
  Ribes marshallii Greene -- accepted -- Hupa gooseberry, Marshall's gooseberry
  Ribes menziesii var. victoris (Greene) Jancz. -- not accepted
  Ribes mogollonicum Greene -- not accepted
  Ribes oxyacanthoides ssp. cognatum (Greene) Sinnott -- not accepted -- stream currant
  Ribes oxyacanthoides var. cognatum (Greene) Morin -- accepted -- stream currant
  Ribes pinetorum Greene -- accepted -- orange gooseberry
  Ribes quercetorum Greene -- accepted -- oak gooseberry, rock gooseberry
  Ribes roezlii var. amictum (Greene) Jeps. -- accepted -- Sierra gooseberry
  Ribes roezlii var. cruentum (Greene) Rehder -- accepted -- shinyleaf currant
  Ribes sanguineum var. deductum (Greene) Jeps. -- not accepted -- blood currant
  Ribes sanguineum var. melanocarpum (Greene) Jeps. -- not accepted -- blood currant
  Ribes valicola Greene ex Rydb. -- not accepted
  Ribes velutinum Greene -- accepted -- desert gooseberry
  Ribes velutinum var. velutinum Greene -- not accepted -- desert gooseberry
  Ribes victoris Greene -- accepted -- Victor's gooseberry
  Ribes victoris var. victoris Greene -- not accepted -- Victor's gooseberry
  Riddellia tagetina (Nutt.) Greene -- not accepted
  Romanzoffia californica Greene -- accepted -- California mistmaiden
  Romanzoffia suksdorfii Greene -- not accepted
  Rorippa curvipes Greene -- accepted -- blunt-leaf yellowcress, bluntleaf yellowcress
  Rorippa curvipes var. curvipes Greene -- not accepted -- blunt-leaf yellowcress, bluntleaf yellowcress
  Rorippa curvisiliqua var. occidentalis (Greene) Stuckey -- not accepted -- western yellowcress
  Rorippa lyrata (Nutt.) Greene -- not accepted
  Rorippa palustris var. dictyota (Greene) Stuckey -- not accepted
  Rorippa tenerrima Greene -- accepted -- Modoc yellowcress, watercress
  Rosa abietorum Greene -- not accepted
  Rosa alcea Greene -- not accepted
  Rosa aldersonii Greene -- not accepted
  Rosa arkansana var. suffulta (Greene) Cockerell -- not accepted -- prairie rose
  Rosa covillei Greene -- not accepted
  Rosa granulata Greene -- not accepted
  Rosa gratissima Greene -- not accepted
  Rosa heliophila Greene -- not accepted
  Rosa helleri Greene -- not accepted
  Rosa leucopsis Greene -- not accepted
  Rosa lunellii Greene -- not accepted
  Rosa macounii Greene -- not accepted
  Rosa manca Greene -- not accepted -- Mancos rose
  Rosa melina Greene -- not accepted
  Rosa mirifica Greene -- not accepted
  Rosa muriculata Greene -- not accepted
  Rosa myriadenia Greene -- not accepted -- glandular rose
  Rosa nutkana ssp. melina (Greene) W.H. Lewis & Ertter -- accepted -- Nootka rose
  Rosa nutkana var. muriculata (Greene) G.N. Jones -- not accepted -- Nootka rose
  Rosa pandorana Greene -- not accepted
  Rosa pisocarpa var. gratissima (Greene) Jeps. -- not accepted
  Rosa pistacoria Greene -- not accepted
  Rosa pratincola Greene -- not accepted
  Rosa rydbergii Greene -- not accepted
  Rosa sonomensis Greene -- not accepted
  Rosa spithamea var. sonomensis (Greene) Jeps. -- not accepted -- Sonoma ground rose
  Rosa stellata ssp. mirifica (Greene) W.H. Lewis -- accepted -- desert rose, wonder rose
  Rosa stellata ssp. mirifica var. mirifica (Greene) Cockerell -- not accepted -- desert rose
  Rosa stellata var. mirifica (Greene) Cockerell -- not accepted -- desert rose
  Rosa suffulta Greene -- not accepted
  Rosa vernonii Greene -- not accepted
  Rosa woodsii ssp. gratissima (Greene) W.H. Lewis & Ertter -- accepted -- Tehachapi rose
  Rosa woodsii ssp. manca (Greene) W.H. Lewis & Ertter -- accepted -- Mancos rose
  Rosa woodsii var. gratissima (Greene) Cole -- not accepted -- Tehachapi rose
  Rosa woodsii var. macounii (Greene) W.C. Martin & C.R. Hutchins -- not accepted
  Rosa X rudiuscula Greene (pro sp.) -- not accepted -- rose
  Rosa yainacensis Greene -- not accepted -- Cascade rose
  Rubus acalyphaceus (Greene) Rydb. -- not accepted
  Rubus arizonicus (Greene) Rydb. -- not accepted
  Rubus bernardinus (Greene) Fedde -- not accepted
  Rubus idaeus var. arizonicus (Greene) Fernald -- not accepted
  Rubus idaeus var. peramoenus (Greene) Fernald -- not accepted
  Rubus idaeus var. viburnifolius (Greene) Greene ex A. Berger -- not accepted
  Rubus leucodermis ssp. bernardinus (Greene) Thorne -- not accepted
  Rubus leucodermis var. bernardinus (Greene) Jeps. -- not accepted -- whitebark raspberry
  Rubus leucodermis var. nigerrimus (Greene) H. St. John -- not accepted
  Rubus nigerrimus (Greene) Rydb. -- not accepted -- dark raspberry
  Rubus parviflorus var. velutinus (Hook. & Arn.) Greene -- not accepted -- thimbleberry
  Rubus peramoenus (Greene) Rydb. -- not accepted
  Rubus strigosus var. acalyphacea (Greene) L.H. Bailey -- not accepted
  Rubus strigosus var. acalyphaceus (Greene) L.H. Bailey -- not accepted
  Rubus strigosus var. arizonicus (Greene) Kearney & Peebles -- not accepted
  Rubus subarcticus (Greene) Rydb. -- not accepted
  Rubus viburnifolius (Greene) Rydb. -- not accepted
  Rumex aquaticus ssp. fenestratus (Greene) Hultén -- not accepted
  Rumex aquaticus var. fenestratus (Greene) Dorn -- not accepted -- western dock
  Rumex ellipticus Greene -- accepted -- elliptic tall dock
  Rumex fenestratus Greene -- not accepted
  Rumex hesperis Greene -- not accepted
  Rumex hesperius Greene -- accepted -- Western willow dock
  Rumex lacustris Greene -- accepted -- lake willow dock
  Rumex occidentalis var. fenestratus (Greene) Lepage -- not accepted
  Rumex occidentalis var. procerus (Greene) J.T. Howell -- not accepted
  Rumex salicifolius var. lacustris (Greene) J.C. Hickman -- not accepted -- lake willow dock
  Rydbergia grandiflora (Torr. & A. Gray ex A. Gray) Greene -- not accepted
  Sagittaria sanfordii Greene -- accepted -- valley arrowhead, Valley sagittaria
  Salvia carnosa Douglas ex Greene -- not accepted
  Salvia cleavelandii (A. Gray) Greene -- not accepted
  Salvia clevelandii (A. Gray) Greene -- accepted -- fragrant sage
  Salvia dorrii ssp. carnosa (Douglas ex Greene) Abrams -- not accepted
  Salvia dorrii var. carnosa (Douglas ex Greene) Cronquist -- not accepted
  Salvia leucophylla Greene -- accepted -- San Luis purple sage
  Salvia mellifera Greene -- accepted -- black sage
  Salvia mohavensis Greene -- accepted -- Mojave sage
  Salvia nohavensis Greene -- not accepted
  Salvia sonomensis Greene -- accepted -- creeping sage
  Salvia spathacea Greene -- accepted -- hummingbird sage
  Salvia X bernardina Parish ex Greene (pro. sp.) -- accepted -- Bernard's sage
  Salvia X palmeri (A. Gray) Greene (pro. sp.) -- accepted -- Palmer's sage
  Sambucus callicarpa Greene -- not accepted -- Pacific red elder
  Sambucus orbiculata Greene -- not accepted
  Samolus vagans Greene -- accepted -- Chiricahua Mountain brookweed
  Sandbergia Greene -- accepted
  Sandbergia whitedii (Piper) Greene -- accepted -- Whited's fissurewort
  Sanguinaria canadensis var. rotundifolia (Greene) Fedde -- not accepted
  Sanicula arguta Greene ex J.M. Coult. & Rose -- accepted -- sharptooth blacksnakeroot
  Sanicula graveolens var. septentrionalis (Greene) H. St. John -- not accepted
  Sanicula nevadensis var. septentrionalis (Greene) Mathias -- not accepted
  Sanicula saxatilis Greene -- accepted -- devil's blacksnakeroot, rock sanicle
  Sanicula septentrionalis Greene -- not accepted
  Saxifraga aprica Greene -- not accepted -- Sierra saxifrage
  Saxifraga californica Greene -- not accepted -- California saxifrage
  Saxifraga fallax Greene -- not accepted
  Saxifraga fragarioides Greene -- not accepted
  Saxifraga howellii Greene -- not accepted -- Howell's saxifrage
  Saxifraga integrifolia var. rhomboidea (Greene) M.E. Jones -- not accepted
  Saxifraga marshallii Greene -- not accepted -- Marshall's saxifrage
  Saxifraga nidifica Greene -- not accepted -- Hooker's saxifrage, peak saxifrage
  Saxifraga nidifica var. nidifica Greene -- not accepted -- peak saxifrage
  Saxifraga parvifolia Greene -- not accepted
  Saxifraga rhomboidea Greene -- not accepted -- diamond-leaf saxifrage, diamondleaf saxifrage
  Saxifraga tolmiei var. ledifolia (Greene) Engl. & Irmsch. -- not accepted
  Saxifraga umbellulata Greene -- not accepted
  Saxifraga virginiensis var. californica (Greene) Jeps. -- not accepted
  Saxifragopsis fragarioides (Greene) Small -- accepted -- strawberry saxifrage
  Schmaltzia anisophylla Greene -- not accepted
  Schmaltzia crenata (Mill.) Greene -- not accepted
  Schmaltzia racemulosa Greene -- not accepted
  Schmaltzia trilobata var. anisophylla (Greene) F.A. Barkley -- not accepted
  Schoenocrambe Greene -- not accepted -- plains mustard, plainsmustard
  Schoenocrambe linifolia (Nutt.) Greene -- not accepted -- flaxleaf plainsmustard, rush mustard
  Scorzonella laciniata var. pratensis (Greene) Jeps. -- not accepted
  Scorzonella procera Greene -- not accepted
  Scrophularia californica ssp. floribunda (Greene) R.J. Shaw -- not accepted -- California figwort
  Scrophularia californica var. floribunda Greene -- not accepted
  Scrophularia floribunda (Greene) A. Heller -- not accepted
  Scrophularia macrantha Greene ex Stiefelh. -- accepted -- New Mexico figwort
  Senecio actinella Greene -- accepted -- Flagstaff ragwort
  Senecio actinella var. mogollonicus (Greene) Greenm. -- not accepted
  Senecio admirabilis Greene -- not accepted
  Senecio amplectens var. holmii (Greene) H.D. Harr. -- accepted -- Holm's groundsel, Holm's ragwort
  Senecio aphanactis Greene -- accepted -- chaparral ragwort
  Senecio arizonicus Greene -- accepted -- Arizona ragwort
  Senecio astephanus Greene -- accepted -- San Gabriel ragwort
  Senecio atratus Greene -- accepted -- tall blacktip ragwort
  Senecio bernardinus Greene -- not accepted -- San Bernardino ragwort
  Senecio blitoides Greene -- not accepted
  Senecio blochmaniae Greene -- accepted -- dune ragwort
  Senecio cardamine Greene -- not accepted -- bittercress ragwort
  Senecio carthamoides Greene -- not accepted
  Senecio cleavelandii Greene -- not accepted
  Senecio clevelandii Greene -- not accepted -- Cleveland's ragwort
  Senecio columbianus Greene -- not accepted
  Senecio covillei Greene -- not accepted
  Senecio covillei var. scorzonella (Greene) Jeps. -- not accepted
  Senecio crepidineus Greene -- not accepted
  Senecio cynthiodes Greene -- not accepted
  Senecio cynthioides Greene -- not accepted -- White Mountain ragwort
  Senecio densus Greene -- not accepted
  Senecio dimorphophyllus Greene -- not accepted -- splitleaf groundsel
  Senecio dimorphophyllus var. dimorphophyllus Greene -- not accepted -- splitleaf groundsel
  Senecio douglasii var. monoensis (Greene) Jeps. -- not accepted
  Senecio flaccidus var. monoensis (Greene) B.L. Turner & T.M. Barkley -- accepted -- green groundsel, Mono groundsel, Mono ragwort
  Senecio flavulus Greene -- not accepted
  Senecio franciscanus Greene -- not accepted -- San Francisco Peaks groundsel, San Francisco Peaks ragwort
  Senecio fremontii ssp. blitoides (Greene) W.A. Weber -- not accepted
  Senecio fremontii var. blitoides (Greene) Cronquist -- accepted -- dwarf mountain ragwort
  Senecio gibbsonsii Greene -- not accepted
  Senecio hesperius Greene -- not accepted -- western ragwort
  Senecio heterodoxus Greene ex Rydb. -- not accepted
  Senecio holmii Greene -- not accepted
  Senecio howellii Greene -- not accepted
  Senecio indecorus Greene -- not accepted -- elegant groundsel
  Senecio ionophyllus Greene -- not accepted -- Tehachapi ragwort
  Senecio laetiflorus Greene -- not accepted
  Senecio layneae Greene -- not accepted -- Layne's butterweed, Layne's ragwort
  Senecio ligulifolius Greene -- not accepted
  Senecio lynceus Greene -- not accepted
  Senecio macounii Greene -- not accepted -- Siskiyou Mountain ragwort
  Senecio metcalfei Greene -- not accepted
  Senecio monoensis Greene -- not accepted
  Senecio mutabilis Greene -- not accepted
  Senecio neomexicanus var. metcalfei (Greene) T.M. Barkley -- not accepted -- Metcalf's groundsel
  Senecio neomexicanus var. mutabilis (Greene) T.M. Barkley -- not accepted -- New Mexico groundsel
  Senecio neomexicanus var. toumeyi (Greene) T.M. Barkley -- not accepted -- Toumey's groundsel
  Senecio newcombei Greene -- not accepted -- Newcombe's ragwort
  Senecio porteri Greene -- not accepted -- Porter's groundsel
  Senecio pseudaureus ssp. flavulus (Greene) G.W. Douglas & G. Ruyle-Douglas -- not accepted
  Senecio pseudaureus var. flavulus (Greene) Greenm. -- not accepted -- falsegold groundsel
  Senecio pudicus Greene -- accepted -- bashful ragwort
  Senecio quaerens Greene -- not accepted -- Mogollon Mountain ragwort
  Senecio quercetorum Greene -- not accepted -- Oak Creek ragwort
  Senecio rubricaulis Greene -- not accepted
  Senecio scorzonella Greene -- accepted -- Sierra groundsel, Sierra ragwort
  Senecio serra var. admirabilis (Greene) A. Nelson -- accepted -- tall ragwort
  Senecio sphaerocephalus Greene -- accepted -- ballhead ragwort, marsh groundsel
  Senecio streptanthifolius Greene -- not accepted -- cleftleaf groundsel
  Senecio streptanthifolius var. laetiflorus (Greene) J.F. Bain -- not accepted -- Rocky Mountain groundsel
  Senecio streptanthifolius var. rubricaulis (Greene) J.F. Bain -- not accepted -- Rocky Mountain groundsel
  Senecio streptanthifolius var. streptanthifolius Greene -- not accepted -- cleftleaf groundsel
  Senecio stygius Greene -- not accepted
  Senecio taraxacoides (A. Gray) Greene -- accepted -- dandelion ragwort
  Senecio toumeyi Greene -- not accepted
  Senecio wardii Greene -- not accepted
  Senecio wootonii Greene -- accepted -- Wooton's ragwort
  Sericocarpus Greene -- accepted -- whitetop aster
  Sericocarpus tomentellus Greene -- not accepted
  Sibara Greene -- accepted -- winged rockcress
  Sibara filifolia (Greene) Greene -- accepted -- Santa Cruz Island rockcress, Santa Cruz Island winged rockcress
  Sidalcea asprella Greene -- accepted -- dwarf checkerbloom
  Sidalcea asprella ssp. asprella Greene -- accepted -- dwarf checkerbloom
  Sidalcea campestris Greene -- accepted -- meadow checkerbloom, meadow checkermallow
  Sidalcea covillei Greene -- accepted -- Owens Valley checkermallow, Owens Valley sidalcea
  Sidalcea elegans Greene -- accepted -- dwarf checkerbloom
  Sidalcea eximia Greene -- not accepted
  Sidalcea glaucescens Greene -- accepted -- waxy checkerbloom, waxy checkermallow
  Sidalcea hickmanii Greene -- accepted -- chaparral checkerbloom
  Sidalcea hickmanii ssp. hickmanii Greene -- accepted -- Hickman's checkerbloom, Hickman's sidalcea
  Sidalcea hickmannii Greene -- not accepted
  Sidalcea hickmannii var. hickmannii Greene -- not accepted
  Sidalcea malviflora ssp. asprella (Greene) C.L. Hitchc. -- not accepted -- dwarf checkerbloom
  Sidalcea malviflora ssp. elegans (Greene) C.L. Hitchc. -- not accepted -- dwarf checkerbloom
  Sidalcea multifida Greene -- accepted -- cutleaf checkerbloom
  Sidalcea neomexicana var. covillei (Greene) Roush -- not accepted
  Sidalcea neomexicana var. parviflora Greene -- not accepted
  Sidalcea oregana ssp. eximia (Greene) C.L. Hitchc. -- accepted -- coast checkerbloom
  Sidalcea oregana ssp. valida (Greene) C.L. Hitchc. -- accepted -- Kenwood Marsh checker-mallow, Kenwood Marsh checkerbloom
  Sidalcea ramunculacea Greene -- not accepted
  Sidalcea ranunculacea Greene -- accepted -- marsh checkerbloom
  Sidalcea reptans Greene -- accepted -- Sierra checkerbloom
  Sidalcea spicata (Regel) Greene -- not accepted
  Sidalcea spicata var. valida (Greene) Wiggins -- not accepted
  Sidalcea valida Greene -- not accepted
  Sideranthus australis (Greene) Rydb. -- not accepted
  Sideranthus wootonii (Greene) Standl. -- not accepted
  Sieversia campanulata (Greene) Rydb. -- not accepted
  Sieversia canescens (Greene) Rydb. -- not accepted
  Sieversia gracilipes (Piper) Greene -- not accepted
  Sieversia pentapetala (L.) Greene -- accepted
  Silene aperta Greene -- accepted -- naked catchfly
  Silene menziesii ssp. menziesii var. viscosa (Greene) C.L. Hitchc. & Maguire -- not accepted
  Silene menziesii var. viscosa (Greene) C.L. Hitchc. & Maguire -- not accepted -- Menzies' campion
  Silene purpurata Greene -- not accepted
  Silene repens ssp. purpurata (Greene) C.L. Hitchc. & Maguire -- not accepted -- pink campion
  Silene scouleri ssp. pringlei var. concolor (Greene) C.L. Hitchc. & Maguire -- not accepted
  Silene scouleri var. concolor (Greene) C.L. Hitchc. & Maguire -- not accepted -- simple campion
  Silphium asteriscus var. simpsonii (Greene) J.A. Clevinger -- accepted -- Simpson's rosinweed
  Silphium incisum Greene -- not accepted
  Silphium simpsonii Greene -- not accepted -- Simpson's rosinweed
  Sinosenecio newcombei (Greene) J.P. Janovec & T.M. Barkley -- accepted -- Newcombe's butterweed
  Sisymbrium pinnatum (Walter) Greene -- not accepted
  Sisyrinchium demissum Greene -- accepted -- dwarf blue-eyed grass, dwarf blueeyed grass, stiff blue-eyed grass, stiff blue-eyed-grass
  Sisyrinchium elmeri Greene -- accepted -- Elmer's blue-eyed grass, Elmer's blue-eyed-grass, Elmer's blueeyed grass
  Sisyrinchium halophilum Greene -- accepted -- Nevada blue-eyed grass
  Sisyrinchium langloisii Greene -- accepted -- roadside blue-eyed grass, roadside blueeyed grass
  Sisyrinchium litorale Greene -- not accepted
  Sisyrinchium littorale Greene -- accepted -- Alaska blue-eyed grass
  Sisyrinchium montanum Greene -- accepted -- mountain blue-eyed grass, mountain blueeyed grass, strict blue-eyed grass, strict blue-eyed-grass
  Sisyrinchium montanum var. montanum Greene -- accepted -- strict blue-eyed grass
  Sisyrinchium sarmentosum Suksd. ex Greene -- accepted -- mountain blue-eyed grass
  Sisyrinchium xerophyllum Greene -- accepted -- jeweled blue-eyed grass
  Sitilias grandiflora (Nutt.) Greene -- not accepted
  Sitilias multicaulis (DC.) Greene -- not accepted
  Smelowskia borealis (Greene) W.H. Drury & Rollins -- accepted -- false candytuft
  Smelowskia borealis var. borealis (Greene) W.H. Drury & Rollins -- not accepted -- northern false candytuft
  Smelowskia fremontii var. bisulcata (Greene) O.E. Schulz -- not accepted
  Smilacina liliacea (Greene) F.L. Wynd -- not accepted
  Solanoa purpurascens (A. Gray) Greene -- not accepted
  Solidago bellidifolia Greene -- not accepted
  Solidago camporum (Greene) A. Nelson -- not accepted
  Solidago chrysothamnoides (Greene) Bush -- not accepted
  Solidago ciliosa Greene -- not accepted
  Solidago decumbens Greene -- not accepted
  Solidago galetorum (Greene) Friesner -- not accepted
  Solidago glutinosa var. racemosa (Greene) Cronquist -- not accepted
  Solidago graminifolia var. galetorum (Greene) House -- not accepted
  Solidago graminifolia var. gymnospermoides (Greene) Croat -- not accepted
  Solidago graminifolia var. media (Greene) S.K. Harris -- not accepted
  Solidago graminifolia var. nuttallii (Greene) Fernald -- not accepted
  Solidago gymnospermoides (Greene) Fernald -- not accepted
  Solidago hirtella (Greene) Bush -- not accepted
  Solidago media (Greene) Bush -- not accepted
  Solidago microcephala (Greene) Bush -- not accepted
  Solidago microphylla (Greene) Bush -- not accepted
  Solidago nuttallii (Greene) Bush -- not accepted
  Solidago parryi (A. Gray) Greene -- not accepted -- Parry's goldenrod
  Solidago pruinosa Greene -- not accepted
  Solidago racemosa Greene -- not accepted
  Solidago radula var. laeta (Greene) Fernald -- not accepted -- western rough goldenrod
  Solidago remota (Greene) Friesner -- not accepted
  Solidago simplex ssp. randii var. racemosa (Greene) G.S. Ringius -- not accepted -- Lake Ontario goldenrod, Rand's goldenrod, verge-d'or simple variété ŕ grappes
  Solidago simplex var. racemosa (Greene) G.S. Ringius -- accepted -- Rand's goldenrod
  Solidago spathulata var. racemosa (Greene) Gleason -- not accepted
  Solidago trinervata Greene -- not accepted
  Sophia hartwegiana (E. Fourn.) Greene -- not accepted
  Sophia incisa (Engelm. ex A. Gray) Greene -- not accepted
  Sophia procera Greene -- not accepted
  Sorbus californica Greene -- accepted -- California mountain-ash
  Sorbus dumosa Greene -- not accepted -- Arizona mountain-ash
  Sorbus occidentalis (S. Watson) Greene -- not accepted
  Sorbus scopulina Greene -- accepted -- Cascade mountain-ash, Greene's mountain-ash
  Sorbus scopulina var. scopulina Greene -- not accepted -- Cascade mountain-ash, Greene's mountain-ash
  Sorbus sitchensis ssp. californica (Greene) Abrams -- not accepted
  Sparganium californicum Greene -- not accepted
  Spergularia clevelandii (Greene) B.L. Rob. -- not accepted
  Spergularia macrotheca var. leucantha (Greene) B.L. Rob. -- accepted -- sticky sandspurry
  Spergularia marina var. tenuis (Greene) R. Rossbach -- not accepted
  Spergularia salina var. tenuis (Greene) Jeps. -- not accepted -- salt sandspurry
  Spergularia sparsiflora (Greene) A. Nelson -- not accepted
  Sphaeralcea digitata (Greene) Rydb. -- accepted -- juniper globemallow, slippery globemallow
  Sphaeralcea digitata ssp. digitata (Greene) Rydb. -- accepted -- juniper globemallow
  Spiraea arbuscula Greene -- not accepted
  Spiraea betulifolia ssp. lucida (Douglas ex Greene) Roy L. Taylor & MacBryde -- not accepted
  Spiraea betulifolia var. lucida (Douglas ex Greene) C.L. Hitchc. -- accepted -- shinyleaf spirea
  Spiraea lucida Douglas ex Greene -- not accepted
  Spiraea X pyramidata Greene (pro sp.) -- accepted -- pyramid spirea
  Spraguea monosperma (Greene) Rydb. -- not accepted
  Stachys scopulorum Greene -- not accepted
  Stachys stricta Greene -- accepted -- Sonoma hedgenettle
  Stanleya bipinnata Greene -- accepted -- bipinnate princesplume
  Stanleya pinnata var. bipinnata (Greene) Rollins -- not accepted -- bipinnate princesplume
  Steironema gramineum Greene -- not accepted
  Steironema pumilum Greene -- not accepted
  Stellaria longipes var. subvestita (Greene) Polunin -- not accepted
  Stellaria subvestita Greene -- not accepted
  Stenotus lanuginosus (A. Gray) Greene -- accepted -- woolly mock goldenweed
  Stenotus lanuginosus var. lanuginosus (A. Gray) Greene -- accepted -- woolly mock goldenweed
  Stenotus stenophyllus (A. Gray) Greene -- not accepted -- linearleaf goldenbush, narrowleaf mock goldenweed
  Stephanomeria coronaria Greene -- not accepted
  Stephanomeria exigua ssp. coronaria (Greene) Gottlieb -- accepted -- whiteplume wirelettuce
  Stephanomeria exigua var. coronaria (Greene) Jeps. -- not accepted
  Stephanomeria neomexicana (Greene) Cory -- not accepted
  Stephanomeria virgata ssp. pleurocarpa (Greene) Gottlieb -- accepted -- wand wirelettuce
  Stephanomeria virgata var. tomentosa (Greene) Munz -- not accepted
  Stokesia laevis (Hill) Greene -- accepted -- Stokes' aster
  Streptanthus albidus Greene -- not accepted -- Metcalf Canyon jewelflower
  Streptanthus albidus ssp. albidus Greene -- not accepted -- Metcalf Canyon jewelflower
  Streptanthus albidus ssp. peramoenus (Greene) Kruckeb. -- not accepted -- most beautiful jewelflower
  Streptanthus barbiger Greene -- accepted -- bearded jewelflower
  Streptanthus benardinus (Greene) Parish -- not accepted
  Streptanthus bernardinus (Greene) Parish -- accepted -- Laguna Mountain jewelflower
  Streptanthus californicus (S. Watson) Greene -- not accepted
  Streptanthus campestris var. bernardinus (Greene) I.M. Johnst. -- not accepted
  Streptanthus fenestratus (Greene) J.T. Howell -- accepted -- Tehipite Valley jewelflower
  Streptanthus glandulosus ssp. albidus (Greene) Al-Shehbaz, M.S. Mayer & D.W. Taylor -- accepted -- Metcalf Canyon jewelflower
  Streptanthus glandulosus ssp. niger (Greene) Al-Shehbaz, M.S. Mayer & D.W. Taylor -- accepted -- Tiburon jewelflower
  Streptanthus glandulosus ssp. pulchellus (Greene) Kruckeb. -- accepted -- Mt. Tamalpais jewelflower
  Streptanthus glandulosus ssp. secundus (Greene) Kruckeb. -- accepted -- secund jewelflower
  Streptanthus glandulosus ssp. secundus var. secundus (Greene) Kruckeb. -- not accepted
  Streptanthus glandulosus var. albidus (Greene) Jeps. -- not accepted
  Streptanthus glandulosus var. niger (Greene) Munz -- not accepted
  Streptanthus glandulosus var. pulchellus (Greene) Jeps. -- not accepted
  Streptanthus glandulosus var. secundus (Greene) Kruckeb. -- not accepted -- secund jewelflower
  Streptanthus inflatus (S. Watson) Greene -- not accepted
  Streptanthus niger Greene -- not accepted -- Tiburon jewelflower
  Streptanthus parryi Greene -- not accepted
  Streptanthus secundus Greene -- not accepted
  Streptanthus tortuosus var. orbiculatus (Greene) H.M. Hall -- not accepted -- shieldplant
  Streptanthus tortuosus var. suffrutescens (Greene) Jeps. -- not accepted -- shieldplant
  Streptanthus validus (Greene) Cory -- not accepted
  Streptanthus vimineus (Greene) Al-Shehbaz & D.W. Taylor -- accepted
  Suaeda moquinii (Torr.) Greene -- not accepted -- alkali seepweed, Mojave seablite, shrubby seepweed, Torrey's seepweed
  Swertia radiata var. macrophylla (Greene) H. St. John -- not accepted
  Symphyotrichum chilense var. invenustum (Greene) G.L. Nesom -- not accepted -- Pacific aster
  Symphyotrichum lentum (Greene) G.L. Nesom -- accepted -- Suisun Marsh aster
  Talinum confertiflorum Greene -- not accepted -- New Mexico fameflower
  Talinum humile Greene -- not accepted -- Pinos Altos fameflower
  Talinum marginatum Greene -- not accepted -- Tepic fameflower
  Talinum validulum Greene -- not accepted -- Tusayan fameflower
  Taraxacum dumetorum Greene -- not accepted
  Taraxacum lacerum Greene -- not accepted
  Taraxacum lecerum Greene -- not accepted
  Tesseranthium macrophyllum (Greene) Rydb. -- not accepted
  Tetradymia filifolia Greene -- accepted -- threadleaf horsebrush
  Tetradymia stenolepis Greene -- accepted -- Mojave cottonthorn, Mojave horsebrush
  Tetraneuris Greene -- accepted -- four-nerve daisy
  Tetraneuris acaulis (Pursh) Greene -- accepted -- stemless actinea, stemless four-nerve daisy, stemless four-nerve-daisy, stemless hymenoxys
  Tetraneuris acaulis var. acaulis (Pursh) Greene -- accepted -- stemless bitterweed, stemless four-nerve daisy, stemless four-nerve-daisy
  Tetraneuris acaulis var. arizonica (Greene) K.F. Parker -- accepted -- Arizona four-nerve daisy, stemless four-nerve daisy
  Tetraneuris argentea (A. Gray) Greene -- accepted -- perkysue
  Tetraneuris brevifolia Greene -- not accepted
  Tetraneuris depressa (Torr. & A. Gray ex A. Gray) Greene -- not accepted -- flat four-nerve daisy
  Tetraneuris fastigiata Greene -- not accepted
  Tetraneuris glabra (Nutt.) Greene -- not accepted
  Tetraneuris herbacea Greene -- accepted -- eastern fournerved daisy
  Tetraneuris ivesiana Greene -- accepted -- Ives' four-nerve-daisy, Ives' fournerved daisy
  Tetraneuris linearifolia (Hook.) Greene -- accepted -- fineleaf fournerved daisy, slimleaf actinea
  Tetraneuris linearifolia var. linearifolia (Hook.) Greene -- accepted -- fineleaf fournerved daisy
  Tetraneuris scaposa (DC.) Greene -- accepted -- stemmy four-nerve daisy
  Tetraneuris scaposa var. scaposa (DC.) Greene -- accepted -- stemmy four-nerve daisy, villous four-nerve daisy
  Tetraneuris torreyana (Nutt.) Greene -- accepted -- flat four-nerve daisy, stone rubberweed, Torrey's four-nerve daisy
  Thalictrum perelegans Greene -- not accepted
  Thalictrum pubescens var. hepaticum (Greene) Keener -- not accepted
  Thalictrum venulosum var. fissum (Greene) B. Boivin -- not accepted
  Thalictrum venulosum var. lunellii (Greene) B. Boivin -- not accepted
  Thelypodium crispum Greene ex Payson -- accepted -- crisp thelypody, crisped thelypody
  Thelypodium integrifolium ssp. affine (Greene) Al-Shehbaz -- accepted -- entireleaved thelypody
  Thelypodium integrifolium var. affine (Greene) S.L. Welsh & Reveal -- not accepted
  Thelypodium lasiophyllum (Hook. & Arn.) Greene -- not accepted
  Thelypodium lasiophyllum var. rigidum (Greene) B.L. Rob. -- not accepted
  Thelypodium lemmonii Greene -- not accepted
  Thelypodium lilacinum Greene -- not accepted
  Thelypodium rhomboideum Greene -- not accepted
  Thelypodium rigidum Greene -- not accepted
  Thermopsis argentata Greene -- not accepted
  Thermopsis californica var. argentata (Greene) C.J. Chen & B.L. Turner -- accepted -- California goldenbanner
  Thermopsis gracilis var. argentata (Greene) Jeps. -- not accepted
  Thermopsis macrophylla var. argentata (Greene) Jeps. -- not accepted
  Thermopsis macrophylla var. velutina (Greene) Larisey -- not accepted
  Thermopsis pinetorum Greene -- not accepted
  Thymophylla aurea (A. Gray) Greene ex Britton -- accepted -- manyawn pricklyleaf
  Thymophylla aurea var. aurea (A. Gray) Greene ex Britton -- accepted -- manyawn pricklyleaf
  Thysanocarpus amplectens Greene -- not accepted
  Thysanocarpus conchuliferus Greene -- accepted -- Santa Cruz Island fringepod, Santa Cruz Island lacepod
  Thysanocarpus curvipes ssp. amplectens (Greene) P.J. Alexander & Windham -- accepted
  Thysanocarpus laciniatus var. conchuliferus (Greene) Jeps. -- not accepted
  Thysanocarpus laciniatus var. emarginatus (Greene) Jeps. -- not accepted
  Thysanocarpus laciniatus var. ramosus (Greene) Munz -- not accepted
  Tillaea bolanderi (S. Watson) Greene -- not accepted
  Tissa clevelandii Greene -- not accepted
  Tissa luteola Greene -- not accepted
  Tissa tenuis Greene -- not accepted
  Tithymalopsis marilandica (Greene) Small -- not accepted
  Tortella tortelloides (S.W. Greene) Robins. -- accepted -- tortella moss
  Townsendia formosa Greene -- accepted -- smooth Townsend daisy, smooth townsend-daisy
  Townsendia pinetorum Greene ex A. Nelson -- not accepted
  Toxicodendron diversilobum (Torr. & A. Gray) Greene -- accepted -- Pacific poison oak
  Toxicodendron quercifolia (Michx.) Greene -- not accepted
  Toxicodendron quercifolium (Michx.) Greene -- not accepted
  Toxicodendron radicans ssp. divaricatum (Greene) Gillis -- accepted -- eastern poison ivy
  Toxicodendron radicans ssp. eximium (Greene) Gillis -- accepted -- eastern poison ivy
  Toxicodendron radicans ssp. negundo (Greene) Gillis -- accepted -- eastern poison ivy
  Toxicodendron radicans var. divaricatum (Greene) F.A. Barkley -- not accepted
  Toxicodendron radicans var. eximium (Greene) F.A. Barkley -- not accepted
  Toxicodendron radicans var. negundo (Greene) Reveal -- not accepted
  Toxicodendron rydbergii (Small ex Rydb.) Greene -- accepted -- poison ivy, western poison ivy
  Tradescantia pinetorum Greene -- accepted -- pinewoods spiderwort
  Trichocoronis riparia (Greene) Greene -- not accepted -- river bugheal
  Trichosterigma benedictum (Greene) Millsp. -- not accepted
  Trifolium albopurpureum var. olivaceum (Greene) Isely -- not accepted
  Trifolium amoenum Greene -- accepted -- showy Indian clover
  Trifolium amplectens var. hydrophilum (Greene) Jeps. -- not accepted
  Trifolium amplectens var. truncatum (Greene) Jeps. -- not accepted
  Trifolium andersonii ssp. monoense (Greene) J.M. Gillett -- accepted -- Mono clover
  Trifolium andersonii var. monoense (Greene) Isely -- not accepted
  Trifolium anemophilum Greene -- not accepted
  Trifolium arizonicum Greene -- not accepted
  Trifolium atrorubens (Greene) House -- not accepted
  Trifolium attenuatum Greene -- accepted -- Rocky Mountain clover
  Trifolium bifidum var. decipiens Greene -- not accepted
  Trifolium columbianum Greene -- not accepted
  Trifolium columbianum var. olivaceum (Greene) Jeps. -- not accepted
  Trifolium columbinum Greene -- not accepted
  Trifolium dasyphyllum ssp. anemophilum (Greene) J.M. Gillett -- accepted -- alpine clover
  Trifolium dasyphyllum var. anemophilum (Greene) J.S. Martin ex Isely -- not accepted
  Trifolium depauperatum var. hydrophilum (Greene) J.S. Martin ex Isely -- not accepted
  Trifolium depauperatum var. laciniatum (Greene) Jeps. -- not accepted
  Trifolium depauperatum var. truncatum (Greene) McDermott ex Isely -- not accepted
  Trifolium elmeri Greene -- not accepted
  Trifolium fendleri Greene -- not accepted
  Trifolium flavulum Greene -- not accepted
  Trifolium fucatum var. virescens (Greene) Jeps. -- not accepted
  Trifolium geminiflorum Greene -- not accepted
  Trifolium hansenii Greene -- not accepted
  Trifolium involucratum var. arizonicum (Greene) McDermott -- not accepted
  Trifolium involucratum var. fendleri (Greene) McDermott -- not accepted
  Trifolium involuncratum var. arizonicum (Greene) McDermott -- not accepted
  Trifolium kingii ssp. macilentum (Greene) J.M. Gillett -- accepted -- King's clover, lean clover
  Trifolium kingii ssp. productum (Greene) D. Heller -- not accepted
  Trifolium kingii var. macilentum (Greene) Isely -- not accepted
  Trifolium kingii var. productum (Greene) Jeps. -- not accepted
  Trifolium lacerum Greene -- not accepted
  Trifolium latifolium (Hook.) Greene -- accepted -- twin clover
  Trifolium longipes ssp. atrorubens (Greene) J.M. Gillett -- accepted -- longstalk clover
  Trifolium longipes ssp. elmeri (Greene) J.M. Gillett -- accepted -- Elmer's clover
  Trifolium longipes ssp. hansenii (Greene) J.M. Gillett -- accepted -- Hansen's clover
  Trifolium longipes var. atrorubens (Greene) Jeps. -- not accepted
  Trifolium longipes var. elmeri (Greene) McDermott -- not accepted
  Trifolium longipes var. hansenii (Greene) Jeps. -- not accepted
  Trifolium longipes var. neurophyllum (Greene) J.S. Martin ex Isely -- not accepted
  Trifolium longipes var. rusbyi (Greene) H.D. Harr. -- not accepted
  Trifolium macilentum Greene -- not accepted
  Trifolium macraei var. albopurpureum (Torr. & A. Gray) Greene -- not accepted
  Trifolium monanthum var. pusillum (Greene) Jeps. -- not accepted
  Trifolium monoense Greene -- not accepted
  Trifolium mucronatum ssp. lacerum (Greene) J.M. Gillett -- accepted -- cusp clover, spinytooth clover
  Trifolium mucronatum var. arizonicum (Greene) Isely -- not accepted
  Trifolium nemorale Greene -- not accepted
  Trifolium neurophyllum Greene -- accepted -- White Mountain clover
  Trifolium olivaceum Greene -- accepted -- olive clover
  Trifolium olivaceum var. columbianum (Greene) Jeps. -- not accepted
  Trifolium olivaceum var. columbinum (Greene) Jeps. -- not accepted
  Trifolium oreganum var. rydbergii (Greene) McDermott -- not accepted
  Trifolium oxydon Greene ex Rydb. -- not accepted
  Trifolium oxyodon Greene ex Rydb. -- not accepted
  Trifolium parryi ssp. salictorum (Greene ex Rydb.) J.M. Gillett -- accepted -- Parry's clover
  Trifolium petraeum Greene -- not accepted
  Trifolium petrophilum Greene ex A. Heller -- not accepted
  Trifolium pinetorum Greene -- accepted -- pinewoods clover, woods clover
  Trifolium polydon Greene -- not accepted
  Trifolium polyodon Greene -- not accepted -- Pacific Grove clover
  Trifolium productum Greene -- accepted -- Shasta clover
  Trifolium pusillum Greene -- not accepted
  Trifolium rusbyi Greene -- not accepted
  Trifolium rusbyi ssp. neurophyllum (Greene) D. Heller & Zohary -- not accepted
  Trifolium rusbyi var. atrorubens Greene -- not accepted
  Trifolium rydbergii Greene -- not accepted
  Trifolium salictorum Greene ex Rydb. -- not accepted
  Trifolium truncatum (Greene) Greene -- not accepted
  Trifolium variegatum var. melananthum (Hook. & Arn.) Greene -- not accepted
  Trifolium variegatum var. rostratum (Greene) C.L. Hitchc. -- not accepted
  Trifolium wormskioldii var. arizonicum (Greene) Barneby -- not accepted
  Triodanis Raf. ex Greene -- accepted -- Venus' looking-glass, Venus' lookingglass
  Triodanis biflora (Ruiz & Pav.) Greene -- not accepted -- small Venus' looking-glass
  Triphysaria micrantha (Greene ex A. Heller) T.I. Chuang & Heckard -- accepted -- purplebeak owl's-clover
  Tripterocalyx carnea (Greene) L.A. Galloway -- not accepted -- winged sandpuffs
  Tripterocalyx carnea var. carnea (Greene) L.A. Galloway -- not accepted -- winged sandpuffs
  Tripterocalyx carneus (Greene) L.A. Galloway -- accepted -- winged sandpuffs
  Tripterocalyx carneus var. carneus (Greene) L.A. Galloway -- not accepted -- winged sandpuffs
  Triteleia bridgesii (S. Watson) Greene -- accepted -- Bridges' brodiaea
  Triteleia crocea (Alph. Wood) Greene -- accepted -- yellow triteleia
  Triteleia crocea var. crocea (Alph. Wood) Greene -- not accepted -- yellow triteleia
  Triteleia gracilis (S. Watson) Greene -- not accepted
  Triteleia hendersonii Greene -- accepted -- Henderson's triteleia
  Triteleia hendersonii var. hendersonii Greene -- not accepted -- Henderson's triteleia
  Triteleia howellii (S. Watson) Greene -- not accepted
  Triteleia hyacinthina (Lindl.) Greene -- accepted -- white brodiaea, wild hyacinth
  Triteleia hyacinthina var. hyacinthina (Lindl.) Greene -- not accepted -- fool's onion
  Triteleia ixioides (W.T. Aiton) Greene -- accepted -- prettyface
  Triteleia ixioides ssp. anilina (Greene) L.W. Lenz -- accepted -- prettyface
  Triteleia ixioides ssp. ixioides (W.T. Aiton) Greene -- accepted -- golden brodiaea
  Triteleia ixioides ssp. scabra (Greene) L.W. Lenz -- accepted -- prettyface
  Triteleia ixioides var. analina (Greene) Hoover -- not accepted
  Triteleia ixioides var. anilina (Greene) Hoover -- not accepted
  Triteleia lemmonae (S. Watson) Greene -- not accepted
  Triteleia lemmoniae (S. Watson) Greene -- accepted -- Oak Creek triplet-lily, Oak Creek triteleia
  Triteleia lilacina Greene -- accepted -- foothill triteleia
  Triteleia lilacinum Greene -- not accepted
  Triteleia lugens Greene -- accepted -- Coast Range triteleia
  Triteleia scabra (Greene) Greene ex Rattan -- not accepted
  Tropidocarpum capparideum Greene -- accepted -- caperfruit tropidocarpum
  Tumion taxifolium (Arn.) Greene -- not accepted
  Unifolium canadense (Desf.) Greene -- not accepted
  Urtica californica Greene -- not accepted
  Urtica dioica var. californica (Greene) C.L. Hitchc. -- not accepted
  Urtica gracilenta Greene -- accepted -- mountain nettle
  Urtica lyallii var. californica (Greene) Jeps. -- not accepted
  Utricularia resupinata B.D. Greene ex Bigelow -- accepted -- lavender bladderwort, northeastern bladderwort
  Vaccinium arboreum var. glaucescens (Greene) Sarg. -- not accepted
  Vaccinium caesium Greene -- not accepted
  Vagnera amplexicaulis (Nutt.) Greene -- not accepted
  Vagnera liliacea (Greene) Rydb. -- not accepted
  Vagnera sessilifolia (Nutt. ex Baker) Greene -- not accepted
  Vanclevea Greene -- not accepted -- vanclevea
  Vanclevea stylosa (Eastw.) Greene -- not accepted -- pillar false gumweed
  Vancouveria brevicula Greene -- not accepted
  Vancouveria chrysantha Greene -- accepted -- golden insideout flower, Siskiyou inside-out flower
  Vancouveria parvifolia Greene -- not accepted
  Vancouveria picta Greene -- not accepted
  Verbena ciliata var. pubera (Greene) L.M. Perry -- not accepted
  Verbena inconspicua Greene -- not accepted
  Verbena plicata Greene -- accepted -- fan-leaf vervain, fanleaf vervain, whiteveined verbena
  Verbena plicata var. plicata Greene -- not accepted -- fanleaf vervain
  Verbena pubera Greene -- not accepted
  Verbena pulchella Greene -- not accepted
  Verbena robusta Greene -- not accepted
  Vicia californica Greene -- not accepted
  Vicia leucophaea Greene -- accepted -- Mogollon Mountain vetch
  Vicia linearis (Nutt.) Greene -- not accepted
  Vicia semicincta Greene -- not accepted
  Viguiera deltoidea var. parishii (Greene) Vasey & Rose -- not accepted
  Viguiera parishii Greene -- not accepted -- Parish's goldeneye
  Viola aberrans Greene -- not accepted
  Viola adunca ssp. uncinulata (Greene) Applegate -- not accepted
  Viola adunca var. bellidifolia (Greene) H.D. Harr. -- accepted
  Viola adunca var. uncinulata (Greene) C.L. Hitchc. -- not accepted
  Viola bakeri Greene -- accepted -- Baker's violet
  Viola bakeri var. bakeri Greene -- not accepted
  Viola bellidifolia Greene -- not accepted
  Viola biternata Greene -- not accepted
  Viola canadensis ssp. rydbergii (Greene) House -- not accepted
  Viola canadensis var. rugulosa (Greene) C.L. Hitchc. -- accepted -- Canadian white violet, creepingroot violet
  Viola emarginata var. subsinuata Greene -- not accepted
  Viola falcata Greene -- not accepted
  Viola kitaibeliana var. rafinesquei (Greene) Fernald -- not accepted
  Viola lanceolata ssp. vittata (Greene) N.H. Russell -- not accepted -- bog white violet
  Viola lanceolata var. vittata (Greene) Weath. & Griscom -- not accepted
  Viola langloisii Greene -- not accepted -- Langlois' violet
  Viola latiuscula Greene -- not accepted
  Viola lobata ssp. psychodes (Greene) Munz -- not accepted
  Viola missouriensis Greene -- not accepted -- Missouri violet
  Viola nephrophylla Greene -- not accepted -- northern bog violet, wanderer violet
  Viola nephrophylla var. arizonica (Greene) Kearney & Peebles -- not accepted
  Viola nephrophylla var. cognata (Greene) C.L. Hitchc. -- not accepted
  Viola nephrophylla var. nephrophylla Greene -- not accepted -- northern bog violet
  Viola nuttallii var. bakeri (Greene) C.L. Hitchc. -- not accepted
  Viola pinetorum Greene -- accepted -- goosefoot yellow violet
  Viola pinetorum ssp. pinetorum Greene -- not accepted -- goosefoot yellow violet
  Viola pinetorum var. pinetorum Greene -- accepted -- goosefoot yellow violet
  Viola porterana var. oregona M.S. Greene & J.C. Clausen -- not accepted
  Viola pratincola Greene -- not accepted -- northern bog violet, prairie blueviolet, wild pansy, wild violet
  Viola psychodes Greene -- not accepted -- butterfly violet
  Viola purpurea ssp. atriplicifolia (Greene) M.S. Baker & J.C. Clausen ex M. Peck -- not accepted
  Viola purpurea var. atriplicifolia (Greene) M. Peck -- not accepted
  Viola purpurea var. pinetorum (Greene) Greene -- not accepted
  Viola rafinesquei Greene -- not accepted
  Viola renifolia var. brainerdii (Greene) Fernald -- not accepted
  Viola retusa Greene -- not accepted
  Viola rugulosa Greene -- not accepted
  Viola rydbergii Greene -- not accepted
  Viola sagittata var. subsagittata (Greene) Pollard -- not accepted
  Viola scopulorum (A. Gray) Greene -- not accepted
  Viola sempervirens Greene -- accepted -- evergreen violet
  Viola septentrionalis Greene -- not accepted -- northern woodland violet
  Viola septentrionalis var. septentrionalis Greene -- not accepted -- northern woodland violet
  Viola sororia var. missouriensis (Greene) L.E. McKinney -- accepted -- Missouri violet
  Viola subvestita Greene -- not accepted
  Viola variabilis Greene -- not accepted
  Viola vittata Greene -- not accepted
  Viola X bernardii Greene (pro sp.) -- not accepted -- Bernard's violet
  Viola X conjugens Greene (pro sp.) -- accepted -- northern bog violet
  Viola X filicetorum Greene (pro sp.) -- accepted -- violet
  Viola X melissifolia Greene -- accepted
  Viola X populifolia Greene (pro sp.) -- accepted -- Peck's violet
  Viola X subsinuata (Greene) Greene (pro sp.) -- accepted
  Wislizenia californica Greene -- accepted -- spectacle fruit
  Wislizenia divaricata Greene -- not accepted
  Wislizenia refracta ssp. californica (Greene) S. Keller -- not accepted -- spectacle fruit
  Wislizenia refracta var. melilotoides (Greene) I.M. Johnst. -- not accepted
  Wyethia invenusta (Greene) W.A. Weber -- not accepted -- Coville's mule-ears
  Wyethia reticulata Greene -- not accepted -- El Dorado mule-ears
  Xanthisma junceum (Greene) D.R. Morgan & R.L. Hartm. -- accepted -- rush bristleweed
  Xanthium acerosum Greene -- not accepted
  Xanthium californicum Greene -- not accepted
  Xanthium campestre Greene -- not accepted
  Xanthium echinellum Greene -- not accepted
  Xanthium glanduliferum Greene -- not accepted
  Xanthium varians Greene -- not accepted
  Xanthocephalum lucidum Greene -- not accepted
  Xanthocephalum tenue (Greene) Shinners -- not accepted
  Xylorhiza orcuttii (Vasey & Rose) Greene -- accepted -- Orcutt's aster
  Xylorhiza tortifolia (Torr. & A. Gray) Greene -- accepted -- Mojave aster, Mojave woodyaster
  Xylorhiza tortifolia var. tortifolia (Torr. & A. Gray) Greene -- accepted -- Mojave aster, Mojave woodyaster
  Xylorhiza wrightii (A. Gray) Greene -- accepted -- Big Bend woodyaster
  Zauschneria californica var. villosa (Greene) Jeps. -- not accepted
  Zauschneria cana Greene -- not accepted
  Zauschneria latifolia (Hook.) Greene -- not accepted
 
 Kingdom Bacteria
  Deferribacter Greene et al., 1997 -- valid
  Deferribacter thermophilus Greene et al., 1997 -- valid
  Frondihabitans Greene et al., 2009 emend. Lee, 2010 emend. Cardinale et al., 2011 -- valid
  Frondihabitans australicus (Zhang et al., 2007) Greene et al., 2009 -- valid
  Geoalkalibacter Zavarzina et al., 2007 emend. Greene et al., 2009 -- valid
  Geoalkalibacter subterraneus Greene et al., 2009 -- valid
   

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