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Taxon author: Torr. & A. Gray

ITIS records citing taxon author "Torr. & A. Gray"
 
 Kingdom Plantae
  Abutilon hulseanum (Torr. & A. Gray) Torr. ex A. Gray -- accepted -- mauve
  Abutilon texense Torr. & A. Gray -- not accepted
  Acacia angustissima var. texensis (Torr. & A. Gray) Isely -- accepted -- prairie wattle, whiteball acacia
  Acacia texensis Torr. & A. Gray -- not accepted
  Acanthogonum polygonoides (Torr. & A. Gray) Goodman -- not accepted
  Acer californica (Torr. & A. Gray) Wesm. -- not accepted
  Acer californicum (Torr. & A. Gray) D. Dietr. -- not accepted
  Acer glabrum var. tripartitum (Nutt. ex Torr. & A. Gray) Pax -- not accepted
  Acer negundo ssp. californicum (Torr. & A. Gray) Wesm. -- not accepted
  Acer negundo var. californicum (Torr. & A. Gray) Sarg. -- accepted -- box elder, California boxelder
  Acer rubrum var. trilobum Torr. & A. Gray ex K. Koch -- accepted -- red maple
  Acer tripartitum Nutt. ex Torr. & A. Gray -- not accepted
  Achillea millefolium var. rosea (Desf.) Torr. & A. Gray -- not accepted
  Achyronychia Torr. & A. Gray -- accepted
  Achyronychia cooperi Torr. & A. Gray -- accepted -- Cooper's frostmat, onyxflower
  Actinea grandiflora (Torr. & A. Gray ex A. Gray) Kuntze -- not accepted
  Actinospermum angustifolium (Pursh) Torr. & A. Gray -- not accepted
  Acuan leptolobum (Torr. & A. Gray) Kuntze -- not accepted
  Agnorhiza ovata (Torr. & A. Gray ex Torr.) W.A. Weber -- accepted -- southern mule-ears
  Agoseris glauca var. dasycephala (Torr. & A. Gray) Jeps. -- accepted -- pale agoseris, pale goat-chicory
  Agrimonia eupatoria var. mollis Torr. & A. Gray -- not accepted
  Agrimonia incisa Torr. & A. Gray -- accepted -- incised agrimony, incised groovebur
  Agrimonia mollis (Torr. & A. Gray) Britton -- not accepted
  Aldenella tenuifolia (Torr. & A. Gray) Greene -- not accepted
  Alectoroctonum wrightii (Torr. & A. Gray) Klotzsch & Garcke -- not accepted
  Aletes tenuifolius (Nutt. ex Torr. & A. Gray) W.A. Weber -- not accepted
  Allotropa Torr. & A. Gray ex A. Gray -- accepted -- sugar stick, sugarstick
  Allotropa virgata Torr. & A. Gray ex A. Gray -- accepted -- sugarstick
  Ambrosia coronopifolia Torr. & A. Gray -- not accepted
  Ambrosia monogyra (Torr. & A. Gray) Strother & B.G. Baldw. -- accepted -- singlewhorl burrobrush
  Ambrosia psilostachya var. coronopifolia (Torr. & A. Gray) Farw. -- not accepted
  Ambrosia salsola (Torr. & A. Gray) Strother & B.G. Baldw. -- accepted -- burrobrush
  Ambrosia salsola var. salsola (Torr. & A. Gray) Strother & B.G. Baldw. -- not accepted
  Ambrosia trifida var. integrifolia (Muhl. ex Willd.) Torr. & A. Gray -- not accepted
  Amelanchier alnifolia var. pumila (Torr. & A. Gray) C.K. Schneid. -- accepted -- dwarf serviceberry
  Amelanchier canadensis var. pumila Torr. & A. Gray -- not accepted -- Canadian serviceberry
  Amelanchier oblongifolia (Torr. & A. Gray) M. Roem. -- not accepted
  Amelanchier pumila (Torr. & A. Gray) Nutt. ex M. Roem. -- not accepted -- dwarf serviceberry
  Ammoselinum Torr. & A. Gray -- accepted -- sandparsley
  Ammoselinum popei Torr. & A. Gray -- accepted -- plains sandparsley
  Amorpha paniculata Torr. & A. Gray -- accepted -- panicled false indigo, panicled indigobush
  Amphicarpaea pitcheri Torr. & A. Gray -- not accepted
  Amphipappus Torr. & A. Gray -- accepted -- amphipappus, chaffbush
  Amphipappus fremontii Torr. & A. Gray ex A. Gray -- accepted -- chaffbush, Fremont's chaffbush
  Amphipappus fremontii ssp. fremontii Torr. & A. Gray ex A. Gray -- not accepted -- Fremont's chaffbush
  Amphipappus fremontii var. fremontii Torr. & A. Gray ex A. Gray -- accepted -- chaff-bush, Fremont's chaffbush
  Anemone decapetala var. heterophylla (Torr. & A. Gray) Britton & Rusby -- not accepted
  Anemone globosa (Torr. & A. Gray) Nutt. ex Pritz. -- not accepted
  Anemone heterophylla Nutt. ex Torr. & A. Gray (pro. syn.) -- not accepted
  Anemone heterophyllum Nutt. ex Torr. & A. Gray (pro. syn.) -- not accepted
  Anemone multifida ssp. globosa (Torr. & A. Gray) Torr. & A. Gray -- not accepted
  Anemone multifida var. globosa Torr. & A. Gray -- not accepted
  Angelica arguta Nutt. ex Torr. & A. Gray -- accepted -- angelica, Lyall's angelica, sharptooth angelica
  Anisocoma Torr. & A. Gray -- accepted -- anisocoma
  Anisocoma acaulis Torr. & A. Gray -- accepted -- scale bud, scalebud
  Anisophyllum fendleri (Torr. & A. Gray) Klotzsch & Garcke -- not accepted
  Anisophyllum melanadenium (Torr. & A. Gray) Klotzsch & Garcke -- not accepted
  Anogra coronopifolia (Torr. & A. Gray) Britton -- not accepted
  Antennaria dimorpha (Nutt.) Torr. & A. Gray -- accepted -- low everlasting, low pussytoes
  Antennaria luzuloides Torr. & A. Gray -- accepted -- rush pussytoes
  Antennaria luzuloides ssp. luzuloides Torr. & A. Gray -- accepted -- rush pussytoes
  Antennaria monocephala (Torr. & A. Gray) Greene non Antennaria monocephala DC. -- not accepted
  Antennaria plantaginifolia var. monocephala Torr. & A. Gray -- not accepted
  Anychiastrum baldwinii (Torr. & A. Gray) Small -- not accepted
  Apargidium Torr. & A. Gray -- not accepted
  Apargidium boreale (Bong.) Torr. & A. Gray -- not accepted
  Aphanostephus riddellii Torr. & A. Gray -- accepted -- Riddell's dozedaisy
  Aphyllon fasciculatum (Nutt.) Torr. & A. Gray -- not accepted
  Apiastrum Nutt. ex Torr. & A. Gray -- accepted
  Aplopappus tortifolius Torr. & A. Gray -- not accepted
  Arabis brachycarpa (Torr. & A. Gray) Britton -- not accepted
  Arabis dentata (Torr.) Torr. & A. Gray -- not accepted
  Arabis hirsuta var. glabrata Torr. & A. Gray -- not accepted -- mountain rockcress
  Arenaria benthamii Fenzl ex Torr. & A. Gray -- accepted -- hilly sandwort
  Arenaria brevifolia Nutt. ex Torr. & A. Gray -- not accepted
  Arenaria douglasii Fenzl ex Torr. & A. Gray -- not accepted
  Arnoglossum diversifolium (Torr. & A. Gray) H. Rob. -- accepted -- variableleaf Indian plaintain, variableleaf Indian plantain
  Artemisia elatior (Torr. & A. Gray) Rydb. -- not accepted
  Artemisia ludoviciana var. gnaphalodes (Nutt.) Torr. & A. Gray -- not accepted
  Artemisia ludoviciana var. latifolia (Besser) Torr. & A. Gray -- not accepted
  Artemisia tilesii ssp. elatior (Torr. & A. Gray) Hultén -- not accepted -- Tilesius' wormwood
  Artemisia tilesii var. elatior Torr. & A. Gray -- not accepted
  Artemisia vulgaris var. mexicana (Willd. ex Spreng.) Torr. & A. Gray -- not accepted
  Aster alpigenus (Torr. & A. Gray) A. Gray -- not accepted
  Aster anomalus Engelm. ex Torr. & A. Gray -- not accepted -- manyray aster
  Aster ascendens var. fremontii Torr. & A. Gray -- not accepted
  Aster baldwinii Torr. & A. Gray. -- not accepted
  Aster borealis (Torr. & A. Gray) Prov. -- not accepted -- rush aster
  Aster chapmanii Torr. & A. Gray -- not accepted -- savannah aster
  Aster commutatus (Torr. & A. Gray) A. Gray -- not accepted
  Aster curtisii Torr. & A. Gray -- not accepted
  Aster divaricatus (Nutt.) Torr. & A. Gray non L. -- not accepted -- aster ŕ rameaux étalés, serpentine aster, white wood aster
  Aster dumosus var. cordidifolius (Michx.) Torr. & A. Gray -- not accepted
  Aster dumosus var. coridifolius (Michx.) Torr. & A. Gray -- not accepted
  Aster dumosus var. gracilentus Torr. & A. Gray -- not accepted
  Aster dumosus var. strictior Torr. & A. Gray -- not accepted -- rice button aster
  Aster dumosus var. subulifolius Torr. & A. Gray -- not accepted -- rice button aster
  Aster elegans (Nutt.) Torr. & A. Gray non Willd. -- not accepted
  Aster elliotti Torr. & A. Gray -- not accepted
  Aster elliottii Torr. & A. Gray -- not accepted
  Aster elodes Torr. & A. Gray -- not accepted
  Aster ericoides var. commutatus (Torr. & A. Gray) B. Boivin -- not accepted
  Aster ericoides var. commutatus (Torr. & A. Gray) B. Boivin -- not accepted
  Aster ericoides var. platyphyllus Torr. & A. Gray -- not accepted
  Aster ericoides var. stricticaulis (Torr. & A. Gray) F.C. Gates -- not accepted -- white heath aster
  Aster ericoides var. villosus (Michx.) Torr. & A. Gray -- not accepted
  Aster eryngiifolius Torr. & A. Gray -- not accepted -- thistleleaf aster
  Aster falcatus ssp. commutatus (Torr. & A. Gray) A.G. Jones -- not accepted
  Aster falcatus var. commutatus (Torr. & A. Gray) A.G. Jones -- not accepted -- cluster aster
  Aster fremonti (Torr. & A. Gray) A. Gray -- not accepted
  Aster fremontii (Torr. & A. Gray) A. Gray -- not accepted
  Aster frondosus (Nutt.) Torr. & A. Gray -- not accepted
  Aster glabriuscula (Nutt.) Torr. & A. Gray -- not accepted
  Aster glaucus Torr. & A. Gray non Nees -- not accepted
  Aster laxifolius var. borealis Torr. & A. Gray -- not accepted
  Aster lindleyanus Torr. & A. Gray -- not accepted
  Aster lutescens (Lindl. ex DC.) Torr. & A. Gray -- not accepted
  Aster mirabilis Torr. & A. Gray -- not accepted -- bouquet aster
  Aster multiflorus var. commutatus Torr. & A. Gray -- not accepted
  Aster multiflorus var. stricticaulis Torr. & A. Gray -- not accepted
  Aster novi-belgii var. elodes (Torr. & A. Gray) A. Gray -- not accepted -- New Belgium aster
  Aster occidentalis (Nutt.) Torr. & A. Gray -- not accepted -- western aster
  Aster occidentalis var. fremontii (Torr. & A. Gray) A.G. Jones -- not accepted -- Fremont's aster
  Aster oregonum (Nutt.) Torr. & A. Gray -- not accepted
  Aster oregonus auct. non (Nutt.) Torr. & A. Gray -- not accepted
  Aster patens var. patentissimus (Lindl. ex DC.) Torr. & A. Gray -- not accepted -- late purple aster
  Aster phyllolepis Torr. & A. Gray -- not accepted
  Aster pilosus var. platyphyllus (Torr. & A. Gray) S.F. Blake -- not accepted
  Aster ptarmicoides (Nees) Torr. & A. Gray -- not accepted
  Aster puniceus ssp. elliottii (Torr. & A. Gray) A.G. Jones -- not accepted
  Aster puniceus var. elliottii (Torr. & A. Gray) A.G. Jones -- not accepted -- Elliott's aster
  Aster puniceus var. firmus (Nees) Torr. & A. Gray -- not accepted -- purplestem aster
  Aster simplex var. ramosissimus (Torr. & A. Gray) Cronquist -- not accepted
  Aster stricticaulis (Torr. & A. Gray) Rydb. -- not accepted
  Aster tenuifolius var. ramosissimus Torr. & A. Gray -- not accepted
  Aster tortifolius (Torr. & A. Gray) A. Gray non Michx. -- not accepted
  Aster xylorhiza (Nutt.) Torr. & A. Gray -- not accepted
  Astragalus beckwithii Torr. & A. Gray -- accepted -- Beckwith's milkvetch
  Astragalus beckwithii var. beckwithii Torr. & A. Gray -- accepted -- Beckwith's milkvetch
  Astragalus crassicarpus var. trichocalyx (Nutt. ex Torr. & A. Gray) Barneby ex Gleason -- accepted -- groundplum milkvetch, Ozark groundplum
  Astragalus decumbens (Nutt. ex Torr. & A. Gray) A. Gray -- not accepted
  Astragalus distortus Torr. & A. Gray -- accepted -- bentpod milkvetch, Ozark milkvetch
  Astragalus distortus var. distortus Torr. & A. Gray -- accepted -- Ozark milkvetch
  Astragalus douglasii (Torr. & A. Gray) A. Gray -- accepted -- Douglas' milkvetch, Jacumba milkvetch
  Astragalus douglasii var. douglasii (Torr. & A. Gray) A. Gray -- accepted -- Douglas's milkvetch, Jacumba milkvetch
  Astragalus flavus Nutt. ex Torr. & A. Gray -- accepted -- yellow milkvetch
  Astragalus goniatus Nutt. ex Torr. & A. Gray -- not accepted
  Astragalus leptocarpus Torr. & A. Gray -- accepted -- rare loco milkvetch, slimpod milkvetch
  Astragalus leucopsis (Torr. & A. Gray) Torr. -- not accepted
  Astragalus mexicanus var. trichocalyx (Nutt. ex Torr. & A. Gray) Fernald -- not accepted
  Astragalus miser var. decumbens (Nutt. ex Torr. & A. Gray) Cronquist -- accepted -- prostrate milkvetch
  Astragalus neglectus (Torr. & A. Gray) E. Sheld. -- accepted -- Cooper's milk-vetch, Cooper's milkvetch
  Astragalus nuttallianus var. trichocarpus Torr. & A. Gray -- accepted -- hairypod milkvetch, turkey peas, turkeypeas
  Astragalus nuttallii (Torr. & A. Gray) J.T. Howell -- accepted -- Nuttall's milkvetch
  Astragalus nuttallii var. nuttallii (Torr. & A. Gray) J.T. Howell -- accepted -- Nuttall's milkvetch
  Astragalus pachycarpus Torr. & A. Gray -- not accepted
  Astragalus pubentissimus Torr. & A. Gray -- accepted -- Green River milkvetch
  Astragalus pubentissimus var. pubentissimus Torr. & A. Gray -- accepted -- Green River milkvetch
  Astragalus reflexus Torr. & A. Gray -- accepted -- drooping milkvetch
  Astragalus stenophyllis Torr. & A. Gray -- not accepted
  Astragalus stenophyllus Torr. & A. Gray -- not accepted
  Astragalus trichocalyx Nutt. ex Torr. & A. Gray -- not accepted
  Astragalus trichopodus ssp. leucopsis (Torr. & A. Gray) Thorne -- not accepted
  Astragalus utahensis (Torr.) Torr. & A. Gray -- accepted -- Utah locoweed, Utah milkvetch
  Astragalus viridis (Nutt. ex Torr. & A. Gray) E. Sheld. -- not accepted
  Astragalus whitneyi ssp. hookerianus (Torr. & A. Gray) Abrams -- not accepted
  Azalea californica Torr. & A. Gray ex Durand -- not accepted
  Azalea occidentalis Torr. & A. Gray ex Torr. -- not accepted
  Baccharis salicina Torr. & A. Gray -- accepted -- Emory's baccharis, Great Plains false willow, Great Plains falsewillow, willow baccharis
  Baccharis texana (Torr. & A. Gray) A. Gray -- accepted -- prairie baccharis, prairie false willow, prairie falsewillow
  Baptisia lecontei Torr. & A. Gray -- accepted -- pineland wild indigo
  Baptisia leucantha Torr. & A. Gray -- not accepted
  Baptisia megacarpa Chapm. ex Torr. & A. Gray -- accepted -- Apalachicola wild indigo
  Berlandiera dealbata (Torr. & A. Gray) Small -- not accepted
  Berlandiera incisa Torr. & A. Gray -- not accepted
  Berlandiera texana var. bentonicifolia (Hook.) Torr. & A. Gray -- not accepted
  Berlandiera texana var. betonicifolia (Hook.) Torr. & A. Gray -- not accepted
  Berlandiera tomentosa var. dealbata Torr. & A. Gray -- not accepted
  Bidens cernua var. elata Torr. & A. Gray -- not accepted
  Bidens discoidea (Torr. & A. Gray) Britton -- accepted -- discoid beggarticks, small beggarticks, swamp beggar-ticks
  Bidens elata (Torr. & A. Gray) Sherff -- not accepted
  Boechera brachycarpa (Torr. & A. Gray) Dorn -- not accepted
  Boisduvalia densiflora var. salicina (Nutt. ex Torr. & A. Gray) Munz -- not accepted
  Boisduvalia salicina (Nutt. ex Torr. & A. Gray) Rydb. -- not accepted
  Boltonia asteroides var. decurrens (Torr. & A. Gray) Fernald -- not accepted
  Boltonia decurrens (Torr. & A. Gray) Alph. Wood -- accepted -- claspingleaf doll's daisy, decurrent false aster
  Boltonia latisquama var. decurrens (Torr. & A. Gray) Fernald & Grisc. -- not accepted
  Boykinia occidentalis Torr. & A. Gray -- accepted -- coast boykinia, coastal brookfoam
  Bradburia hirtella Torr. & A. Gray -- accepted -- Texas chrysopsis
  Brickellia californica (Torr. & A. Gray) A. Gray -- accepted -- California brickellbush, Jepson's brickellbush
  Brickellia californica var. californica (Torr. & A. Gray) A. Gray -- not accepted -- California brickellbush
  Brickellia eupatorioides var. corymbulosa (Torr. & A. Gray) Shinners -- accepted -- false boneset
  Cacalia diversifolia Torr. & A. Gray -- not accepted
  Caesalpinia drummondii (Torr. & A. Gray) Fisher -- not accepted -- dwarf nicker
  Caesalpinia jamesii (Torr. & A. Gray) Fisher -- not accepted -- James' holdback, James' rushpea
  Calamintha canescens Torr. & A. Gray ex Benth. -- not accepted
  Callirhoe involucrata (Torr. & A. Gray) A. Gray -- accepted -- low poppymallow, purple poppy mallow, purple poppymallow, winecup
  Callirhoe involucrata var. involucrata (Torr. & A. Gray) A. Gray -- accepted -- purple poppy mallow, purple poppymallow
  Callirhoe involucrata var. lineariloba (Torr. & A. Gray) A. Gray -- accepted -- purple poppymallow
  Calochortus nuttallii Torr. & A. Gray -- accepted -- sego lily, sego-lily
  Calophanes linearis (Torr. & A. Gray) A. Gray -- not accepted
  Caltha palustris var. flabellifolia (Pursh) Torr. & A. Gray -- not accepted
  Calycadenia tenella (Nutt.) Torr. & A. Gray -- not accepted
  Calycanthus floridus var. glaucus (Willd.) Torr. & A. Gray -- accepted -- eastern sweetshrub
  Calycanthus floridus var. laevigatus (Willd.) Torr. & A. Gray -- not accepted
  Calylophus hartwegii ssp. lavandulifolius (Torr. & A. Gray) Towner & P.H. Raven -- not accepted
  Calylophus hartwegii var. lavandulifolius (Torr. & A. Gray) Shinners -- not accepted
  Calylophus lavandulifolius (Torr. & A. Gray) P.H. Raven -- not accepted -- lavender calylophus, lavender sundrop, lavenderleaf eveningprimrose, lavenderleaf sundrops
  Calylophus serrulatus var. spinulosus (Nutt. ex Torr. & A. Gray) Shinners -- not accepted
  Calymmandra candida Torr. & A. Gray -- not accepted
  Calytophus lavandulifolius (Torr. & A. Gray) P.H. Raven -- not accepted
  Camissonia bistorta (Nutt. ex Torr. & A. Gray) P.H. Raven -- not accepted -- southern suncup
  Camissonia breviflora (Torr. & A. Gray) P.H. Raven -- not accepted -- fewflower evening primrose, fewflower evening-primrose, shortflower suncup
  Camissonia californica (Nutt. ex Torr. & A. Gray) P.H. Raven -- not accepted -- California primrose, California suncup
  Camissonia ovata (Nutt. ex Torr. & A. Gray) P.H. Raven -- not accepted -- goldeneggs
  Camissonia parvula (Nutt. ex Torr. & A. Gray) P.H. Raven -- accepted -- Lewis River suncup
  Camissonia scapoidea (Torr. & A. Gray) P.H. Raven -- not accepted -- barestem eveningprimrose, Paiute suncup, scapoid suncup
  Camissonia scapoidea ssp. scapoidea (Torr. & A. Gray) P.H. Raven -- not accepted -- Paiute suncup, Seorsa evening primrose, Seorsa eveningprimrose
  Camissonia tanacetifolia (Torr. & A. Gray) P.H. Raven -- not accepted -- tansyleaf evening primrose, tansyleaf evening-primrose, tansyleaf suncup
  Camissonia tanacetifolia ssp. tanacetifolia (Torr. & A. Gray) P.H. Raven -- not accepted -- tansyleaf evening primrose, tansyleaf evening-primrose, tansyleaf suncup
  Camissoniopsis bistorta (Nutt. ex Torr. & A. Gray) W.L. Wagner & Hoch -- accepted -- southern suncup
  Carduus lecontei (Torr. & A. Gray) Pollard -- not accepted
  Carphephorus bellidifolius (Michx.) Torr. & A. Gray -- accepted -- sandywoods chaffhead
  Carphephorus corymbosus (Nutt.) Torr. & A. Gray -- accepted -- coastal plain chaffhead, coastalplain chaffhead
  Carphephorus tomentosus (Michx.) Torr. & A. Gray -- accepted -- woolly chaffhead
  Castela erecta ssp. texana (Torr. & A. Gray) Cronquist -- not accepted -- allthorn goatbush, Texan goatbush
  Castela texana (Torr. & A. Gray) Rose -- accepted
  Cayaponia boykinii (Torr. & A. Gray) Cogn. -- not accepted
  Cayaponia grandifolia (Torr. & A. Gray) Small -- not accepted
  Ceanothus americanus var. intermedius (Pursh) Torr. & A. Gray -- not accepted
  Ceanothus americanus var. pitcheri Torr. & A. Gray -- not accepted
  Ceanothus dentatus Torr. & A. Gray -- accepted -- sandscrub ceanothus
  Ceanothus herbaceus var. pubescens (Torr. & A. Gray ex S. Watson) Shinners -- not accepted
  Ceanothus incanus Torr. & A. Gray -- accepted -- coast whitethorn
  Ceanothus ovatus var. pubescens Torr. & A. Gray ex S. Watson -- not accepted
  Ceanothus papillosus Torr. & A. Gray -- accepted -- wartleaf ceanothus
  Ceanothus papillosus ssp. papillosus Torr. & A. Gray -- not accepted -- King hybrid ceanothus
  Ceanothus papillosus var. papillosus Torr. & A. Gray -- accepted -- wartleaf ceanothus
  Ceanothus pubescens (Torr. & A. Gray ex S. Watson) Rydb. ex Small -- not accepted
  Ceanothus velutinus var. laevigatus Torr. & A. Gray -- not accepted
  Centaurium beyrichii (Torr. & A. Gray ex Torr.) B.L. Rob. -- not accepted -- mountain pink, quinineweed, rock centaury
  Centaurium beyrichii var. beyrichii (Torr. & A. Gray ex Torr.) B.L. Rob. -- not accepted -- quinineweed
  Cereus californicus Torr. & A. Gray -- not accepted
  Chaenactis glabriuscula var. heterocarpha (Torr. & A. Gray ex A. Gray) H.M. Hall -- accepted -- yellow pincushion
  Chaenactis heterocarpha Torr. & A. Gray ex A. Gray -- not accepted
  Chaerophyllum procumbens var. shortii Torr. & A. Gray -- accepted -- Short's spreading chervil
  Chaerophyllum shortii (Torr. & A. Gray) Bush -- not accepted
  Chamaesyce albomarginata (Torr. & A. Gray) Small -- not accepted -- rattlesnake weed, whitemargin euphorbia, whitemargin sandmat, whitemargin spurge
  Chamaesyce fendleri (Torr. & A. Gray) Small -- not accepted -- Fendler's sandmat
  Chamaesyce fendleri var. fendleri (Torr. & A. Gray) Small -- not accepted -- Fendler's sandmat
  Chamaesyce melanadenia (Torr. & A. Gray) Millsp. -- not accepted -- prostrate spurge, red-gland spurge, squaw sandmat
  Chapmannia Torr. & A. Gray -- accepted
  Chapmannia floridana Torr. & A. Gray -- accepted -- Florida alicia
  Chiogenes hispidula (L.) Torr. & A. Gray -- not accepted
  Chloris verticillata var. aristulata Torr. & A. Gray -- not accepted
  Chorizanthe corrugata (Torr.) Torr. & A. Gray -- accepted -- wrinkled chorizanthe, wrinkled spineflower
  Chorizanthe polygonoides Torr. & A. Gray -- accepted -- knotweed spineflower
  Chorizanthe polygonoides var. polygonoides Torr. & A. Gray -- accepted -- knotweed spineflower
  Chorizanthe rigida (Torr.) Torr. & A. Gray -- accepted -- devil's spineflower, spiny chorizanthe, turkshead
  Chorizanthe uniaristata Torr. & A. Gray -- accepted -- oneawn spineflower
  Chorizanthe watsonii Torr. & A. Gray -- accepted -- five-tooth spineflower, fivetooth spineflower, Watson's chorizanthe
  Chrysopsis canescens (DC.) Torr. & A. Gray non DC. -- not accepted
  Chrysopsis oligantha Chapm. ex Torr. & A. Gray -- not accepted
  Chrysopsis scabrella Torr. & A. Gray -- accepted -- coastal plain goldenaster, coastalplain goldenaster
  Chylismia (Nutt. ex Torr. & A. Gray) Raim. -- accepted
  Chylismia scapoidea (Torr. & A. Gray) Small -- not accepted -- Paiute suncup
  Chylismia scapoidea (Torr. & A. Gray) Nutt. ex Raim. -- accepted
  Chylismia scapoidea ssp. scapoidea (Torr. & A. Gray) Nutt. ex Raim. -- accepted
  Chylismia scapoidea ssp. scapoidea (Torr. & A. Gray) Small -- not accepted -- Paiute suncup
  Cimicifuga cordifolia (DC.) Torr. & A. Gray -- not accepted
  Cirsium drummondii Torr. & A. Gray -- accepted -- dwarf thistle
  Cirsium horridulum var. elliottii Torr. & A. Gray -- not accepted
  Cirsium lecontei Torr. & A. Gray -- accepted -- Le Conte's thistle
  Cirsium pitcheri (Torr. ex Eaton) Torr. & A. Gray -- accepted -- Pitcher's thistle, sand dune thistle
  Clarkia epilobioides (Nutt. ex Torr. & A. Gray) A. Nelson & J.F. Macbr. -- accepted -- canyon clarkia, canyon fairyfan
  Claytonia exigua Torr. & A. Gray -- accepted -- serpentine springbeauty
  Claytonia exigua ssp. exigua Torr. & A. Gray -- accepted -- serpentine springbeauty
  Claytonia exigua ssp. glauca (Torr. & A. Gray) John M. Mill. & K.L. Chambers -- accepted -- serpentine springbeauty
  Claytonia heterophylla (Torr. & A. Gray) Swanson -- not accepted -- variableleaf springbeauty
  Claytonia parviflora var. glauca Nutt. ex Torr. & A. Gray -- not accepted
  Claytonia sibirica var. heterophylla (Torr. & A. Gray) A. Gray -- not accepted
  Claytonia spathulata var. exigua (Torr. & A. Gray) Hook. & Arn. -- not accepted
  Claytonia spathulata var. tenuifolia Torr. & A. Gray -- not accepted
  Clematis baldwinii Torr. & A. Gray -- accepted -- pine hyacinth
  Clematis baldwinii var. baldwinii Torr. & A. Gray -- not accepted -- pine hyacinth
  Clematis columbiana (Nutt.) Torr. & A. Gray -- accepted -- Columbian virgin's-bower, rock clematis
  Clematis columbiana var. columbiana (Nutt.) Torr. & A. Gray -- accepted -- Columbian virginsbower, rock clematis
  Clematis drummondii Torr. & A. Gray -- accepted -- Drummond's clematis, old man's beard
  Clematis pitcheri Torr. & A. Gray -- accepted -- bluebill, Pitcher's clematis, Pitcher's virginsbower
  Clematis pitcheri var. pitcheri Torr. & A. Gray -- accepted -- bluebill, Pitcher's clematis
  Cleome tenuifolia Leconte ex Torr. & A. Gray (pro. syn.) -- not accepted
  Coelostylis Torr. & A. Gray -- not accepted
  Coelostylis loganioides Torr. & A. Gray ex Endl. & Fenzl -- not accepted
  Cogswellia daucifolia (Torr. & A. Gray) M.E. Jones -- not accepted
  Cogswellia macrocarpa (Nutt. ex Torr. & A. Gray) M.E. Jones -- not accepted
  Coldenia greggii (Torr. & A. Gray) A. Gray -- not accepted
  Coldenia hispidissima (Torr. & A. Gray) A. Gray -- not accepted
  Colubrina texensis (Torr. & A. Gray) A. Gray -- accepted -- Texan hogplum, Texas colubrina
  Colubrina texensis var. texensis (Torr. & A. Gray) A. Gray -- accepted -- Texan hogplum
  Condalia obtusifolia (Hook. ex Torr. & A. Gray) Weberb. -- not accepted
  Conradina canescens (Torr. & A. Gray ex Benth.) A. Gray -- accepted -- false rosemary
  Coptis occidentalis (Nutt.) Torr. & A. Gray -- accepted -- Idaho goldthread
  Coreopsis cardaminefolia (DC.) Torr. & A. Gray -- not accepted
  Coreopsis drummondii (D. Don) Torr. & A. Gray -- not accepted
  Coreopsis grandiflora var. longipes (Hook.) Torr. & A. Gray -- not accepted -- largeflower tickseed
  Coreopsis leavenworthii Torr. & A. Gray -- accepted -- Leavenworth's tickseed
  Corethrogyne tomentella (Hook. & Arn.) Torr. & A. Gray -- not accepted
  Coriflora baldwinii (Torr. & A. Gray) W.A. Weber -- not accepted
  Coriflora pitcheri (Torr. & A. Gray) W.A. Weber -- not accepted
  Cornus alba var. occidentalis (Torr. & A. Gray) B. Boivin -- not accepted
  Cornus occidentalis (Torr. & A. Gray) Coville -- not accepted
  Cornus sericea ssp. occidentalis (Torr. & A. Gray) Fosberg -- accepted -- western dogwood
  Cornus stolonifera var. occidentalis (Torr. & A. Gray) C.L. Hitchc. -- not accepted
  Crassula drummondii sensu (Torr. & A. Gray) Fedde -- not accepted -- smallleaf pygmyweed
  Crassula drummondii (Torr. & A. Gray) Fedde -- accepted -- small-leaf pygmyweed, smallleaf pygmyweed
  Crataegus aestivalis (Walter) Torr. & A. Gray -- accepted -- may hawthorn
  Crataegus berberifolia Torr. & A. Gray -- accepted -- barberry hawthorn, barberry-leaved hawthorn
  Crataegus berberifolia var. berberifolia Torr. & A. Gray -- accepted -- barberry hawthorn
  Crataegus mollis (Torr. & A. Gray) Scheele -- accepted -- Arnold hawthorn, downy hawthorn, red hawthorn
  Crataegus mollis var. mollis (Torr. & A. Gray) Scheele -- accepted -- downy hawthorn
  Crataegus nudiflora Nutt. ex Torr. & A. Gray -- not accepted
  Crepis glauca (Nutt.) Torr. & A. Gray -- not accepted
  Crepis runcinata (James) Torr. & A. Gray -- accepted -- dandelion hawksbeard, fiddle-leaf hawk's-beard, fiddle-leaf hawksbeard, fiddleleaf hawksbeard
  Crepis runcinata ssp. runcinata (James) Torr. & A. Gray -- accepted -- dandelion hawksbeard, fiddle-leaf hawk's-beard, fiddleleaf hawksbeard
  Cristatella jamesii Torr. & A. Gray -- not accepted
  Crookea microsepala (Torr. & A. Gray) Small -- not accepted
  Croptilon divaricatum var. hookerianum (Torr. & A. Gray) Shinners -- not accepted
  Croptilon hookerianum (Torr. & A. Gray) House -- accepted -- Hooker's scratchdaisy
  Croptilon hookerianum var. hookerianum (Torr. & A. Gray) House -- accepted -- Hooker's scratchdaisy
  Crusea tricocca (Torr. & A. Gray) A. Heller -- 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 pusilla (Torr. & A. Gray) Greene -- accepted -- low catseye, low cryptantha
  Cyclanthera dissecta (Torr. & A. Gray) Arn. -- accepted -- cut-leaf cyclanthera, cutleaf cyclanthera
  Cylindropuntia californica (Torr. & A. Gray) F.M. Knuth -- accepted
  Cylindropuntia californica var. californica (Torr. & A. Gray) F.M. Knuth -- accepted
  Cymopterus montanus Nutt. ex Torr. & A. Gray -- accepted -- Montana wavewing, mountain springparsley
  Cymopterus terebinthinus (Hook.) Torr. & A. Gray -- not accepted
  Cymopterus terebinthinus var. albiflorus (Torr. & A. Gray) M.E. Jones -- not accepted
  Cymopterus terebinthinus var. foeniculaceus (Nutt. ex Torr. & A. Gray) Cronquist -- not accepted
  Cynoctonum angustifolium (Torr. & A. Gray) Small -- not accepted
  Cynoctonum sessilifolium var. angustifolium Torr. & A. Gray -- not accepted
  Dalea carnea var. albida (Torr. & A. Gray) Barneby -- accepted -- whitetassels
  Dalea emarginata (Torr. & A. Gray) Shinners -- accepted -- wedgeleaf prairie clover, wedgeleaf prairieclover
  Dalea jamesii (Torr.) Torr. & A. Gray -- accepted -- James' dalea, James' prairie clover, James' prairieclover
  Dalea obovata (Torr. & A. Gray) Shinners -- accepted -- pussyfoot
  Dalea parryi Torr. & A. Gray -- not accepted
  Dalea phleoides (Torr. & A. Gray) Shinners -- accepted -- slimspike prairie clover, slimspike prairieclover
  Dalea phleoides var. microphylla (Torr. & A. Gray) Barneby -- accepted -- slimspike prairie clover, slimspike prairieclover
  Dalea phleoides var. phleoides (Torr. & A. Gray) Shinners -- accepted -- slimspike prairie clover, slimspike prairieclover
  Dalea villosa var. grisea (Torr. & A. Gray) Barneby -- accepted -- silky prairie clover, silky prairieclover
  Decodon verticillatus var. laevigatus Torr. & A. Gray -- not accepted
  Delphinium californicum Torr. & A. Gray -- accepted -- California larkspur
  Delphinium californicum ssp. californicum Torr. & A. Gray -- accepted -- California larkspur
  Delphinium nudicaule Torr. & A. Gray -- accepted -- red larkspur
  Delphinium variegatum Torr. & A. Gray -- accepted -- royal larkspur
  Delphinium variegatum ssp. variegatum Torr. & A. Gray -- accepted -- royal larkspur
  Desmanthus leptolobus Torr. & A. Gray -- accepted -- prairie bundleflower, slenderlobe bundleflower
  Desmodium bracteosum var. longifolium (Torr. & A. Gray) B.L. Rob. -- not accepted
  Desmodium canescens var. villosissimum Torr. & A. Gray -- not accepted
  Desmodium cuspidatum var. longifolium (Torr. & A. Gray) B.G. Schub. -- accepted -- largebract ticktrefoil
  Desmodium longifolium (Torr. & A. Gray) Smyth -- not accepted
  Desmodium paniculatum var. angustifolium Torr. & A. Gray -- not accepted
  Desmodium paniculatum var. pubens Torr. & A. Gray -- not accepted
  Desmodium sessilifolium (Torr.) Torr. & A. Gray -- accepted -- sessile tickclover, sessileleaf tickclover, sessileleaf ticktrefoil
  Desmodium tenuifolium Torr. & A. Gray -- accepted -- slimleaf ticktrefoil
  Diaperia candida (Torr. & A. Gray) Benth. -- accepted -- silver pygmycudweed
  Diaperia drummondii (Torr. & A. Gray) Benth. -- not accepted
  Diaperia verna var. drummondii (Torr. & A. Gray) Morefield -- accepted -- spring pygmycudweed
  Dieteria incana (Lindl.) Torr. & A. Gray -- not accepted
  Dioclea multiflora (Torr. & A. Gray) C. Mohr -- accepted -- Boykin's clusterpea
  Diodia tricocca Torr. & A. Gray -- not accepted
  Diodia virginiana var. latifolia Torr. & A. Gray -- accepted -- Virginia buttonweed
  Dipteracanthus linearis Torr. & A. Gray -- not accepted
  Dolicholus latifolius (Nutt. ex Torr. & A. Gray) Vail -- not accepted
  Draba brachycarpa Nutt. ex Torr. & A. Gray -- accepted -- short-pod whitlowgrass, shortfruited draba, shortpod draba
  Draba cuneifolia Nutt. ex Torr. & A. Gray -- accepted -- wedgeleaf draba, wedgeleaf whitlowgrass
  Draba cuneifolia var. cuneifolia Nutt. ex Torr. & A. Gray -- accepted -- wedgeleaf draba, wedgeleaf whitlowgrass
  Draba cuneifolia var. platycarpa (Torr. & A. Gray) S. Watson -- not accepted
  Draba platycarpa Torr. & A. Gray -- accepted -- broad-pod whitlowgrass, broadpod draba, broadpod whitlowgrass
  Dyschoriste linearis (Torr. & A. Gray) Kuntze -- accepted -- narrowleaf dyschoriste, polkadots
  Dyschoriste linearis var. linearis (Torr. & A. Gray) Kuntze -- accepted -- polkadots
  Dysodiopsis tagetoides (Torr. & A. Gray) Rydb. -- accepted -- false dogfennel, marygold dogweed
  Dyssodia tagetoides Torr. & A. Gray -- not accepted
  Echinocactus viridescens Torr. & A. Gray -- not accepted
  Echinocystis Torr. & A. Gray -- accepted
  Echinocystis lobata (Michx.) Torr. & A. Gray -- accepted -- wild balsamapple, wild cucumber, wild mock-cucumber, wild mockcucumber
  Eddya hispidissima Torr. & A. Gray -- not accepted
  Elatine texana (Hook.) Torr. & A. Gray -- not accepted
  Epilobium foliosum (Torr. & A. Gray) Suksd. -- accepted -- California willowherb, leafy willowherb
  Epilobium minutum var. foliosum Torr. & A. Gray -- not accepted
  Epilobium paniculatum Nutt. ex Torr. & A. Gray -- not accepted
  Epilobium paniculatum var. paniculatum Nutt. ex Torr. & A. Gray -- not accepted
  Erigeron concinnus (Hook. & Arn.) Torr. & A. Gray -- accepted -- hairy daisy, Navajo fleabane
  Erigeron concinnus var. concinnus (Hook. & Arn.) Torr. & A. Gray -- accepted -- Navajo daisy, Navajo fleabane
  Erigeron divergens Torr. & A. Gray -- accepted -- spreading daisy, spreading fleabane
  Erigeron peregrinus ssp. callianthemus var. scaposus (Torr. & A. Gray) Cronquist -- not accepted -- subalpine fleabane
  Erigeron peregrinus var. scaposus (Torr. & A. Gray) Cronquist -- not accepted
  Erigeron strigosus var. beyrichii (Fisch. & C.A. Mey.) Torr. & A. Gray ex A. Gray -- not accepted -- Beyrich's fleabane
  Erigeron tenuis Torr. & A. Gray -- accepted -- slender fleabane, slenderleaf fleabane
  Erigeron vernus (L.) Torr. & A. Gray -- accepted -- early whitetop fleabane
  Eriogonum brachypodum Torr. & A. Gray -- accepted -- Parry's buckwheat, Parry's wild buckwheat
  Eriogonum brevicaule var. laxifolium (Torr. & A. Gray) Reveal -- accepted -- goldenball eriogonum, shortstem buckwheat
  Eriogonum cernuum ssp. tenue (Torr. & A. Gray) S. Stokes -- not accepted
  Eriogonum cernuum var. tenue Torr. & A. Gray -- not accepted
  Eriogonum corymbosum var. divaricatum Torr. & A. Gray -- not accepted
  Eriogonum dasyanthemum Torr. & A. Gray -- accepted -- chaparral buckwheat
  Eriogonum deflexum ssp. watsonii (Torr. & A. Gray) S. Stokes -- not accepted
  Eriogonum deflexum var. brachypodum (Torr. & A. Gray) Munz -- not accepted
  Eriogonum deflexum var. watsonii (Torr. & A. Gray) R.J. Davis -- not accepted
  Eriogonum ericifolium Torr. & A. Gray -- accepted -- Yavapai buckwheat, Yavapai County buckwheat
  Eriogonum ericifolium var. ericifolium Torr. & A. Gray -- not accepted -- Yavapai buckwheat, Yavapai County buckwheat
  Eriogonum fasciculatum var. polifolium (Benth.) Torr. & A. Gray -- accepted -- Eastern Mojave buckwheat, flattop buckwheat, Mojave buckwheat
  Eriogonum greggii Torr. & A. Gray -- accepted -- Gregg's buckwheat
  Eriogonum heracleoides var. angustifolium (Nutt.) Torr. & A. Gray -- not accepted -- parsnipflower buckwheat
  Eriogonum incanum Torr. & A. Gray -- accepted -- frosted buckwheat
  Eriogonum kingii Torr. & A. Gray -- accepted -- Ruby Mountain buckwheat
  Eriogonum leptocladon Torr. & A. Gray -- accepted -- fine branched buckwheat, sand buckwheat
  Eriogonum leptocladon var. leptocladon Torr. & A. Gray -- accepted -- sand buckwheat
  Eriogonum leptophyllum (Torr. & A. Gray) Wooton & Standl. -- accepted -- slender-leaf buckwheat, slenderleaf buckwheat
  Eriogonum lobbii Torr. & A. Gray -- accepted -- granite buckwheat, Lobb's buckwheat
  Eriogonum lobbii var. lobbii Torr. & A. Gray -- not accepted -- Lobb's buckwheat
  Eriogonum lonchophyllum Torr. & A. Gray -- accepted -- spearleaf buckwheat, spreading wild buckwheat
  Eriogonum lonchophyllum var. lonchophyllum Torr. & A. Gray -- not accepted -- spearleaf buckwheat
  Eriogonum marifolium Torr. & A. Gray -- accepted -- marumleaf buckwheat
  Eriogonum marifolium var. incanum (Torr. & A. Gray) M.E. Jones -- not accepted
  Eriogonum marifolium var. marifolium Torr. & A. Gray -- accepted -- marumleaf buckwheat
  Eriogonum microthecum var. confertiflorum (Benth.) Torr. & A. Gray -- not accepted
  Eriogonum microthecum var. effusum (Nutt.) Torr. & A. Gray -- not accepted
  Eriogonum microthecum var. foliosum (Torr. & A. Gray) Reveal -- not accepted
  Eriogonum niveum var. decumbens (Benth.) Torr. & A. Gray -- not accepted
  Eriogonum nutans Torr. & A. Gray -- accepted -- drooping buckwheat, Dugway buckwheat
  Eriogonum nutans var. nutans Torr. & A. Gray -- accepted -- Dugway buckwheat
  Eriogonum proliferum Torr. & A. Gray -- not accepted
  Eriogonum pusillum Torr. & A. Gray -- accepted -- puny buckwheat, yellow-turbans, yellowturbans
  Eriogonum pyrolifolium var. coryphaeum Torr. & A. Gray -- accepted -- Shasta buckwheat
  Eriogonum reniforme ssp. pusillum (Torr. & A. Gray) S. Stokes -- not accepted
  Eriogonum strictum ssp. proliferum (Torr. & A. Gray) S. Stokes -- not accepted -- Blue Mountain buckwheat
  Eriogonum strictum ssp. proliferum var. proliferum (Torr. & A. Gray) C.L. Hitchc. -- not accepted -- Blue Mountain buckwheat
  Eriogonum strictum var. proliferum (Torr. & A. Gray) C.L. Hitchc. -- accepted -- Blue Mountain buckwheat
  Eriogonum tenellum var. caulescens Torr. & A. Gray -- not accepted
  Eriogonum truncatum Torr. & A. Gray -- accepted -- Contra Costa buckwheat, Mt. Diablo buckwheat
  Eriogonum umbellatum ssp. bahiiforme (Torr. & A. Gray) Munz -- not accepted
  Eriogonum umbellatum var. bahiiforme (Torr. & A. Gray) Jeps. -- accepted -- sulphur-flower buckwheat
  Eriogonum umbellatum var. monocephalum Torr. & A. Gray -- not accepted
  Eriogonum watsonii Torr. & A. Gray -- accepted -- Watson's buckwheat
  Eritrichium pusillum Torr. & A. Gray -- not accepted
  Eryngium leavenworthii Torr. & A. Gray -- accepted -- Leavenworth's eryngo
  Erythraea beyrichii Torr. & A. Gray -- not accepted
  Eulobus Nutt. ex Torr. & A. Gray -- accepted
  Eulobus californicus Nutt. ex Torr. & A. Gray -- accepted -- California suncup
  Eupatorium lancifolium (Torr. & A. Gray) Small -- accepted -- lanceleaf thoroughwort
  Eupatorium leucolepis (DC.) Torr. & A. Gray -- accepted -- justiceweed
  Eupatorium leucolepis var. leucolepis (DC.) Torr. & A. Gray -- accepted -- justiceweed
  Eupatorium semiserratum var. lancifolium Torr. & A. Gray -- not accepted
  Eupatorium texense (Torr. & A. Gray) Rydb. -- not accepted
  Euphorbia albomarginata Torr. & A. Gray -- accepted -- Rattlesnake weed, white-margin sandmat, white-margin sandwort, whitemargin sandmat
  Euphorbia dilatata Torr. & A. Gray -- not accepted
  Euphorbia fendleri Torr. & A. Gray -- accepted -- Fendler's sandmat
  Euphorbia melanadenia Torr. & A. Gray -- accepted -- prostrate spurge, red-gland spurge, squaw sandmat
  Euphorbia wrightii Torr. & A. Gray -- accepted -- Wright's spurge
  Eurybia chapmanii (Torr. & A. Gray) G.L. Nesom -- not accepted -- savannah aster
  Eurybia eryngiifolia (Torr. & A. Gray) G.L. Nesom -- accepted -- thistleleaf aster
  Eurybia mirabilis (Torr. & A. Gray) G.L. Nesom -- accepted -- bouquet aster
  Eurytaenia Torr. & A. Gray -- accepted -- spreadwing
  Eurytaenia texana Torr. & A. Gray -- accepted -- Texas spreadwing
  Euthamia leptocephala (Torr. & A. Gray) Greene ex Porter & Britton -- accepted -- bushy goldentop
  Evax candida (Torr. & A. Gray) A. Gray -- not accepted -- silver evax, silver pygmycudweed
  Evax multicaulis var. drummondii (Torr. & A. Gray) A. Gray -- not accepted
  Evax verna var. drummondii (Torr. & A. Gray) Kartesz & Gandhi -- not accepted -- spring pygmycudweed
  Falcata pitcheri (Torr. & A. Gray) Kuntze -- not accepted
  Ferocactus viridescens (Torr. & A. Gray) Britton & Rose -- accepted -- Biznaga-barril verdosa, coast barrel cactus, San Diego barrel cactus
  Festuca macrostachya Torr. & A. Gray -- not accepted
  Filaginopsis drummondii Torr. & A. Gray -- not accepted
  Filaginopsis multicaulis (DC.) Torr. & A. Gray -- not accepted
  Filago candida (Torr. & A. Gray) Shinners -- not accepted
  Filago verna var. drummondii (Torr. & A. Gray) Shinners -- not accepted
  Galactia brachypoda Torr. & A. Gray -- not accepted
  Galactia elliottii var. leavenworthii Torr. & A. Gray -- not accepted
  Galactia floridana Torr. & A. Gray -- accepted -- Florida milkpea
  Galactia spiciformis Torr. & A. Gray -- not accepted
  Galium angustifolium Nutt. ex Torr. & A. Gray -- accepted -- narrowleaf bedstraw
  Galium californicum var. texanum Torr. & A. Gray -- not accepted
  Galium circaezans var. lanceolatum (Torr.) Torr. & A. Gray -- not accepted
  Galium concinnum Torr. & A. Gray -- accepted -- shining bedstraw
  Galium pilosum var. puncticulosum (Michx.) Torr. & A. Gray -- accepted -- hairy bedstraw
  Galium texanum (Torr. & A. Gray) Wiegand -- not accepted
  Galium trifidum var. tinctorium (L.) Torr. & A. Gray -- not accepted
  Galium virgatum var. leiocarpum Torr. & A. Gray -- not accepted
  Galpinsia lavandulifolia (Torr. & A. Gray) Small -- not accepted
  Gaura biennis var. pitcheri Torr. & A. Gray -- not accepted
  Gaura drummondii (Spach) Torr. & A. Gray -- not accepted -- Drummond's beeblossom, scented gaura
  Gaura filipes var. major Torr. & A. Gray -- not accepted
  Gaura pitcheri (Torr. & A. Gray) Small -- not accepted
  Gaylussacia dumosa (Andrews) Torr. & A. Gray -- accepted -- dwarf huckleberry
  Gaylussacia dumosa var. dumosa (Andrews) Torr. & A. Gray -- not accepted -- dwarf huckleberry
  Gaylussacia frondosa (L.) Torr. & A. Gray -- accepted -- blue huckleberry, dangleberry
  Gaylussacia frondosa var. frondosa (L.) Torr. & A. Gray -- not accepted
  Gaylussacia ursina (M.A. Curtis) Torr. & A. Gray -- accepted -- bear huckleberry
  Gayophytum diffusum Torr. & A. Gray -- accepted -- bigflower groundsmoke, spreading groundsmoke
  Gayophytum diffusum ssp. diffusum Torr. & A. Gray -- accepted -- spreading groundsmoke
  Gayophytum nuttallii Torr. & A. Gray -- not accepted
  Gayophytum racemosum Torr. & A. Gray -- accepted -- black-foot groundsmoke, blackfoot groundsmoke
  Gayophytum racemosum var. caesium (Torr. & A. Gray) Munz -- not accepted
  Gayophytum ramosissimum Torr. & A. Gray -- accepted -- muchbranched groundsmoke, pinyon groundsmoke
  Geraea Torr. & A. Gray -- accepted -- desert sunflower, desertsunflower
  Geraea canescens Torr. & A. Gray -- accepted -- desert sunflower, desertgold, hairy desertsunflower
  Geraea canescens var. canescens Torr. & A. Gray -- not accepted -- hairy desert sunflower, hairy desertsunflower
  Geranium viscosissimum var. incisum (Torr. & A. Gray) N.H. Holmgren -- accepted -- sticky purple geranium
  Gerardia barbata (Torr. & A. Gray) S.F. Blake -- not accepted
  Geum vernum (Raf.) Torr. & A. Gray -- accepted -- heartleaf avens, spring avens
  Gilia gunnisonii Torr. & A. Gray -- not accepted
  Glycosma occidentalis Nutt. ex Torr. & A. Gray -- not accepted
  Gnaphalium purpureum var. falcatum (Lam.) Torr. & A. Gray -- not accepted
  Godetia epilobioides (Nutt. ex Torr. & A. Gray) S. Watson -- not accepted
  Gutierrezia californica (DC.) Torr. & A. Gray -- accepted -- California snakeweed, San Joaquin snakeweed
  Gutierrezia texana (DC.) Torr. & A. Gray -- accepted -- Texas broomweed, Texas snakeweed
  Gutierrezia texana var. texana (DC.) Torr. & A. Gray -- accepted -- Texas snakeweed
  Halea ludoviciana Torr. & A. Gray -- not accepted
  Hamosa leptocarpa (Torr. & A. Gray) Rydb. -- not accepted
  Haplopappus alpigenus Torr. & A. Gray -- not accepted
  Haplopappus divaricatus var. hookerianus (Torr. & A. Gray) Waterf. -- not accepted
  Haplopappus drummondii (Torr. & A. Gray) S.F. Blake -- not accepted
  Haplopappus lanceolatus (Hook.) Torr. & A. Gray -- not accepted
  Haplopappus lanceolatus var. lanceolatus (Hook.) Torr. & A. Gray -- not accepted
  Haplopappus nuttallii Torr. & A. Gray -- not accepted
  Haplopappus pluriflorus (Torr. & A. Gray) H.M. Hall -- not accepted
  Haplopappus pygmaeus (Torr. & A. Gray) A. Gray -- not accepted
  Haplopappus uniflorus (Hook.) Torr. & A. Gray -- not accepted
  Haplopappus uniflorus var. uniflorus (Hook.) Torr. & A. Gray -- not accepted
  Hedyotis caerulea var. minor (Michx.) Torr. & A. Gray -- not accepted
  Hedyotis halei Torr. & A. Gray -- not accepted
  Hedyotis longifolia var. tenuifolia (Nutt.) Torr. & A. Gray -- not accepted
  Hedyotis minima (Beck) Torr. & A. Gray -- not accepted
  Hedyotis purpurea (L.) Torr. & A. Gray -- not accepted
  Helenium autumnale var. canaliculatum (Lam.) Torr. & A. Gray -- not accepted
  Helenium autumnale var. grandiflorum (Nutt.) Torr. & A. Gray -- not accepted -- fall sneezeweed
  Helenium incisum (Torr. & A. Gray) Alph. Wood -- not accepted
  Helianthella Torr. & A. Gray -- accepted -- helianthella
  Helianthella grandiflora Torr. & A. Gray -- not accepted
  Helianthella tenuifolia Torr. & A. Gray -- not accepted
  Helianthella uniflora (Nutt.) Torr. & A. Gray -- accepted -- oneflower helianthella
  Helianthella uniflora var. douglasii (Torr. & A. Gray) W.A. Weber -- not accepted -- Douglas' helianthella
  Helianthella uniflora var. uniflora (Nutt.) Torr. & A. Gray -- not accepted -- oneflower helianthella
  Helianthemum scoparium Nutt. ex Torr. & A. Gray -- accepted -- Bisbee Peak rushrose
  Helianthus argophyllis Torr. & A. Gray -- not accepted
  Helianthus argophyllus Torr. & A. Gray -- accepted -- silverleaf sunflower
  Helianthus cinereus var. sullivantii Torr. & A. Gray -- not accepted
  Helianthus cucumerifolius Torr. & A. Gray -- not accepted
  Helianthus debilis ssp. cucumerifolius (Torr. & A. Gray) Heiser -- accepted -- cucumberleaf sunflower
  Helianthus debilis var. cucumerifolius (Torr. & A. Gray) A. Gray -- not accepted
  Helianthus hirsutus var. stenophyllus Torr. & A. Gray -- not accepted
  Helianthus hirsutus var. trachyphyllus Torr. & A. Gray -- not accepted
  Helianthus laevigatus Torr. & A. Gray -- accepted -- smooth sunflower
  Helianthus microcephalus Torr. & A. Gray -- accepted -- small woodland sunflower
  Helianthus nuttallii Torr. & A. Gray -- accepted -- Nuttall's sunflower
  Helianthus nuttallii ssp. nuttallii Torr. & A. Gray -- accepted -- Nuttall's sunflower
  Helianthus occidentalis ssp. plantagineus (Torr. & A. Gray) Shinners -- accepted -- fewleaf sunflower, Gewleaf sunflower
  Helianthus occidentalis var. dowellianus (M.A. Curtis) Torr. & A. Gray -- not accepted
  Helianthus occidentalis var. plantagineus Torr. & A. Gray -- not accepted
  Helianthus radula (Pursh) Torr. & A. Gray -- accepted -- rayless sunflower, stiff sunflower
  Helianthus schweinitzii Torr. & A. Gray -- accepted -- Schweinitz's sunflower
  Helianthus stenophyllus (Torr. & A. Gray) E.E. Watson -- not accepted
  Helianthus X cinereus Torr. & A. Gray (pro sp.) -- accepted -- sunflower
  Hemizonia corymbosa (DC.) Torr. & A. Gray -- not accepted -- coastal tarweed
  Hemizonia corymbosa ssp. corymbosa (DC.) Torr. & A. Gray -- not accepted -- coastal tarweed
  Hemizonia fasciculata (DC.) Torr. & A. Gray -- not accepted -- clustered tarweed
  Hemizonia pugens (Hook. & Arn.) Torr. & A. Gray -- not accepted
  Hemizonia pugens var. pugens (Hook. & Arn.) Torr. & A. Gray -- not accepted
  Hemizonia pungens (Hook. & Arn.) Torr. & A. Gray -- not accepted -- common spikeweed, common tarweed, spikeweed
  Hemizonia pungens ssp. pungens (Hook. & Arn.) Torr. & A. Gray -- not accepted -- common tarweed, spikeweed
  Heterotheca oligantha (Chapm. ex Torr. & A. Gray) V.L. Harms -- not accepted
  Heterotheca scabrella (Torr. & A. Gray) V.L. Harms -- not accepted
  Heuchera curtisii Torr. & A. Gray ex A. Gray -- not accepted
  Heuchera cylindrica var. glabella (Torr. & A. Gray) Wheelock -- not accepted -- beautiful alumroot
  Heuchera cylindrica var. ovalifolia (Torr. & A. Gray) Wheelock -- not accepted
  Heuchera glabella Torr. & A. Gray -- not accepted
  Heuchera ovalifolia Torr. & A. Gray -- not accepted
  Heuchera parvifolia Nutt. ex Torr. & A. Gray -- accepted -- common alumroot, little-leaf alumroot, littleleaf alumroot
  Heuchera parvifolia var. parvifolia Nutt. ex Torr. & A. Gray -- not accepted -- littleleaf alumroot
  Hoffmannseggia drummondii Torr. & A. Gray -- accepted -- dwarf nicker
  Hoffmannseggia jamesii Torr. & A. Gray -- not accepted
  Holcophacos distortus (Torr. & A. Gray) Rydb. -- not accepted
  Honckenya oblongifolia Torr. & A. Gray -- not accepted
  Hosackia subpinnata auct. non (Lag.) Torr. & A. Gray -- not accepted
  Hulsea Torr. & A. Gray -- accepted -- alpinegold, hulsea
  Hulsea californica Torr. & A. Gray -- accepted -- San Diego alpinegold
  Hydrangea arborescens var. oblonga Torr. & A. Gray -- not accepted
  Hydrangea arborescens var. sterilis Torr. & A. Gray -- not accepted
  Hydrophila drummondii sensu (Torr. & A. Gray) House -- not accepted
  Hydrophila drummondii (Torr. & A. Gray) House -- not accepted
  Hymenatherum tagetoides (Torr. & A. Gray) A. Gray -- not accepted
  Hymenoclea Torr. & A. Gray ex A. Gray -- accepted -- burrobrush
  Hymenoclea monogyla Torr. & A. Gray -- not accepted
  Hymenoclea monogyra Torr. & A. Gray -- not accepted -- cheeseweed burrobrush, singlewhorl burrobrush, singlewhorl burrobush
  Hymenoclea salsola Torr. & A. Gray -- not accepted -- burrobrush, white burrobrush
  Hymenoclea salsola var. salsola Torr. & A. Gray -- not accepted -- burrobrush, white burrobrush
  Hymenopappus corymbosus Torr. & A. Gray -- not accepted
  Hymenopappus scabiosaeus var. corymbosus (Torr. & A. Gray) B.L. Turner -- accepted -- Carolina woollywhite
  Hymenoxys depressa (Torr. & A. Gray ex A. Gray) S.L. Welsh & Reveal -- not accepted
  Hymenoxys grandiflora (Torr. & A. Gray ex A. Gray) K.F. Parker -- accepted -- graylocks four-nerve daisy, graylocks hymenoxys
  Hypericum drummondii (Grev. & Hook.) Torr. & A. Gray -- accepted -- Drummond's St. Johnswort, nits and lice
  Hypericum microsepalum (Torr. & A. Gray) A. Gray ex S. Watson -- accepted -- flatwoods St. Johnswort
  Hypericum opacum Torr. & A. Gray -- not accepted
  Ilex ambigua var. montana (Torr. & A. Gray ex A. Gray) H.E. Ahles -- not accepted
  Ilex montana Torr. & A. Gray ex A. Gray -- accepted -- mountain holly, mountain winterberry
  Ilex verticillata var. padifolia (Willd.) Torr. & A. Gray ex S. Watson -- not accepted
  Iliamna acerifolia (Nutt. ex Torr. & A. Gray) Greene -- not accepted
  Indigofera leptosepala Nutt. ex Torr. & A. Gray -- not accepted
  Indigofera miniata var. leptosepala (Nutt. ex Torr. & A. Gray) B.L. Turner -- not accepted -- western indigo
  Iodanthus (Torr. & A. Gray) Steud. -- accepted
  Iodanthus hesperidioides (Torr. & A. Gray) A. Gray -- not accepted
  Ipomopsis gunnisonii (Torr. & A. Gray) V.E. Grant -- accepted -- sand-dune skyrocket, sanddune ipomopsis, sanddune skyrocket
  Isnardia spathulata (Torr. & A. Gray) Small -- not accepted
  Isocoma drummondii (Torr. & A. Gray) Greene -- accepted -- Drummond's goldenbush, Drummond's goldenweed, Drummond's jimmyweed
  Isocoma pluriflora (Torr. & A. Gray) Greene -- accepted -- rayless goldenrod, southern goldenbush, southern jimmyweed
  Isopappus divaricatus (Nutt.) Torr. & A. Gray -- not accepted
  Isopappus hookerianus Torr. & A. Gray -- not accepted
  Isopyrum biternatum (Raf.) Torr. & A. Gray -- not accepted
  Ivesia Torr. & A. Gray -- accepted -- mousetail
  Ivesia gordanii (Hook.) Torr. & A. Gray -- not accepted
  Ivesia gordonii (Hook.) Torr. & A. Gray -- accepted -- Gordon's ivesia
  Ivesia gordonii var. gordonii (Hook.) Torr. & A. Gray -- accepted -- Gordon's ivesia
  Ivesia gracilis Torr. & A. Gray -- not accepted
  Jacksonia tenuifolia (Torr. & A. Gray) Greene -- not accepted
  Jamesia Torr. & A. Gray -- accepted -- cliffbush
  Jamesia americana Torr. & A. Gray -- accepted -- cliff Jamesia, cliffbush, fivepetal cliffbush
  Jamesia americana var. americana Torr. & A. Gray -- accepted -- fivepetal cliffbush
  Koellia albescens (Torr. & A. Gray) Kuntze -- not accepted
  Koellia clinopodioides (Torr. & A. Gray) Kuntze -- not accepted
  Kraunhia macrostachya (Torr. & A. Gray) Small -- not accepted
  Krynitzkia crassisepala (Torr. & A. Gray) A. Gray -- not accepted
  Kuhnia eupatorioides var. corymbulosa Torr. & A. Gray -- not accepted
  Kuhnia eupatorioides var. gracilis Torr. & A. Gray -- not accepted
  Lacinaria boykinii (Torr. & A. Gray) Kuntze -- not accepted
  Lacinaria chapmanii (Torr. & A. Gray) Kuntze -- not accepted
  Lactuca canadensis var. integrifolia (Bigelow) Torr. & A. Gray -- not accepted
  Lactuca hirsuta var. albiflora (Torr. & A. Gray) Shinners -- not accepted -- hairy lettuce
  Lactuca spicata var. integrifolia (Torr. & A. Gray) Britton -- 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
  Layia carnosa (Nutt.) Torr. & A. Gray -- accepted -- beach layia, beach tidytips
  Layia fremontii (Torr. & A. Gray) A. Gray -- accepted -- Fremont's tidytips
  Lepachys columnaris (Pursh) Torr. & A. Gray -- not accepted
  Lepachys peduncularis Torr. & A. Gray -- not accepted
  Lepachys pinnata (Vent.) Torr. & A. Gray -- not accepted
  Lepidium oxycarpum Torr. & A. Gray -- accepted -- forked pepperweed
  Leptopoda fimbriata Torr. & A. Gray non Leptopoda fimbriata (Michx.) Eaton -- not accepted
  Lespedeza capitata var. vulgaris Torr. & A. Gray -- not accepted
  Lespedeza hirta var. sparsiflora Torr. & A. Gray -- not accepted
  Lesquerella angustifolia (Nutt. ex Torr. & A. Gray) S. Watson -- not accepted -- annual bladderpod, thread-leaved bladderpod, threadleaf bladderpod
  Lesquerella gracilis ssp. nuttallii (Torr. & A. Gray) Rollins & E.A. Shaw -- not accepted -- Nuttall's bladderpod
  Lesquerella nuttallii (Torr. & A. Gray) S. Watson -- not accepted
  Lesquerella pallida (Torr. & A. Gray) S. Watson -- not accepted -- white bladderpod
  Liatris chapmanii Torr. & A. Gray -- accepted -- Chapman's blazing star
  Liatris compacta (Torr. & A. Gray) Rydb. -- accepted -- scaly blazing star
  Liatris squarrosa var. compacta Torr. & A. Gray -- not accepted -- scaly blazing star
  Liatris X boykinii Torr. & A. Gray (pro sp.) -- accepted -- Boykin's gayfeather
  Ligusticum apiifolium (Nutt. ex Torr. & A. Gray) A. Gray -- accepted -- celeryleaf licorice-root
  Linosyris texana Torr. & A. Gray -- not accepted
  Linum rigidum var. berlandieri (Hook.) Torr. & A. Gray -- not accepted
  Lithophragma (Nutt.) Torr. & A. Gray -- accepted -- woodland-star
  Lithophragma cymbalaria Torr. & A. Gray -- accepted -- mission woodland-star
  Lobelia boykinii Torr. & A. Gray ex A. DC. -- accepted -- Boykin's lobelia
  Lomatium bicolor var. leptocarpum (Torr. & A. Gray) Schlessman -- accepted -- Wasatch desert parsley, Wasatch desertparsley, Wasatch lomatium
  Lomatium dasycarpum (Torr. & A. Gray) J.M. Coult. & Rose -- accepted -- woollyfruit desertparsley
  Lomatium dasycarpum ssp. dasycarpum (Torr. & A. Gray) J.M. Coult. & Rose -- accepted -- woollyfruit desertparsley
  Lomatium daucifolium (Torr. & A. Gray) J.M. Coult. & Rose -- not accepted
  Lomatium divaricatum (Pursh) Nutt. ex Torr. & A. Gray -- not accepted
  Lomatium foeniculaceum ssp. daucifolium (Torr. & A. Gray) W.L. Theob. -- accepted -- carrot-leaf desert-parsley, desert biscuitroot
  Lomatium foeniculaceum var. daucifolium (Torr. & A. Gray) Cronquist -- not accepted
  Lomatium leptocarpum (Torr. & A. Gray) J.M. Coult. & Rose -- not accepted
  Lomatium lucidum (Nutt. ex Torr. & A. Gray) Jeps. -- accepted -- shiny biscuitroot
  Lomatium macrocarpum (Nutt. ex Torr. & A. Gray) J.M. Coult. & Rose -- accepted -- bigseed biscuitroot, bigseed lomatium, large-fruit desert-parsley, largefruit biscuitroot, long mamma
  Lomatium macrocarpum var. ellipticum (Torr. & A. Gray) Jeps. -- not accepted
  Lomatium tenuifolium Nutt. ex Torr. & A. Gray -- not accepted
  Lomatium utriculatum (Nutt. ex Torr. & A. Gray) J.M. Coult. & Rose -- accepted -- common lomatium
  Lonicera albiflora Torr. & A. Gray -- accepted -- western white honeysuckle, white honeysuckle
  Lonicera caerulea var. villosa (Michx.) Torr. & A. Gray -- not accepted
  Lonicera hispidula (Lindl.) Douglas ex Torr. & A. Gray -- accepted -- pink honeysuckle
  Lonicera hispidula var. hispidula (Lindl.) Douglas ex Torr. & A. Gray -- accepted -- pink honeysuckle
  Ludwigia cylindrica var. brachycarpa Torr. & A. Gray -- not accepted
  Ludwigia glandulosa ssp. brachycarpa (Torr. & A. Gray) C.I. Peng -- accepted -- cylindricfruit primrose-willow
  Ludwigia spathulata Torr. & A. Gray -- accepted -- spoon primrose-willow
  Lupinus falcifer Nutt. ex Torr. & A. Gray (pro. syn.) -- not accepted
  Lupinus foliosus (Torr. & A. Gray) Nutt. ex Hook. -- not accepted
  Lupinus laxiflorus var. foliosus Torr. & A. Gray -- not accepted
  Lupinus laxiflorus var. tenellus (Douglas ex G. Don) Torr. & A. Gray -- not accepted
  Lupinus polyphyllus ssp. polyphyllus var. grandifolius (Lindl. ex J. Agardh) Torr. & A. Gray -- not accepted -- bigleaf lupine
  Lupinus polyphyllus var. grandifolius (Lindl. ex J. Agardh) Torr. & A. Gray -- accepted -- bigleaf lupine
  Lupinus villosus var. diffusus (Nutt.) Torr. & A. Gray -- not accepted
  Lygodesma grandiflora (Nutt.) Torr. & A. Gray -- not accepted
  Lygodesmia aphylla var. texana Torr. & A. Gray -- not accepted
  Lygodesmia grandiflora (Nutt.) Torr. & A. Gray -- accepted -- largeflower skeletonplant, largeflower skeletonweed, rush-pink
  Lygodesmia grandiflora var. grandiflora (Nutt.) Torr. & A. Gray -- accepted
  Lygodesmia texana (Torr. & A. Gray) Greene -- accepted -- Texas skeletonplant
  Lythrum alatum var. lanceolatum (Elliott) Torr. & A. Gray ex Rothr. -- accepted -- winged lythrum
  Lythrum californicum Torr. & A. Gray -- accepted -- California loosestrife
  Machaeranthera tortifolia (Torr. & A. Gray) Cronquist & D.D. Keck -- not accepted
  Madia dissitiflora (Nutt.) Torr. & A. Gray -- not accepted
  Madia sativa var. congesta Torr. & A. Gray -- not accepted
  Malacothamnus fasciculatus (Nutt. ex Torr. & A. Gray) Greene -- accepted -- Mendocino bushmallow
  Malacothrix incana (Nutt.) Torr. & A. Gray -- accepted -- dunedelion
  Malacothrix saxatilis (Nutt.) Torr. & A. Gray -- accepted -- cliff desert dandelion, cliff desertdandelion
  Malacothrix saxatilis var. commutata (Torr. & A. Gray) Ferris -- accepted -- cliff desertdandelion
  Malacothrix saxatilis var. saxatilis (Nutt.) Torr. & A. Gray -- accepted -- cliff desertdandelion
  Malacothrix sonchoides (Nutt.) Torr. & A. Gray -- accepted -- sowthistle desert dandelion, sowthistle desertdandelion, yellow-saucers
  Malacothrix tenuifolia (Nutt.) Torr. & A. Gray -- not accepted
  Malva fasciculata Nutt. ex Torr. & A. Gray -- not accepted
  Malvastrum fasciculatum (Nutt. ex Torr. & A. Gray) Greene -- not accepted
  Malvaviscus arboreus var. drummondii (Torr. & A. Gray) Schery -- accepted -- wax mallow
  Malvaviscus drummondii Torr. & A. Gray -- not accepted
  Marina parryi (Torr. & A. Gray) Barneby -- accepted -- Parry dalea, Parry's false prairie-clover, Parry's indigobush
  Meibomia longifolia (Torr. & A. Gray) Vail -- not accepted
  Meibomia pubens (Torr. & A. Gray) Rydb. -- not accepted
  Meibomia tenuifolia (Torr. & A. Gray) Kuntze -- not accepted
  Melampodium leucanthum Torr. & A. Gray -- accepted -- plains blackfoot, plains blackfoot daisy
  Melanobatus leucodermis (Douglas ex Torr. & A. Gray) Greene -- not accepted
  Mentzelia albicaulis (Douglas ex Hook.) Douglas ex Torr. & A. Gray -- accepted -- white blazingstar, white-stemmed evening-star, whitestem blazingstar, whitestem stickleaf
  Mentzelia albicaulis var. albicaulis (Hook.) Torr. & A. Gray -- not accepted -- whitestem blazingstar
  Mentzelia congesta Nutt. ex Torr. & A. Gray -- accepted -- united blazingstar, Ventana blazingstar
  Mentzelia congesta var. congesta Nutt. ex Torr. & A. Gray -- not accepted -- Ventana blazingstar
  Mentzelia floridana Nutt. ex Torr. & A. Gray -- accepted -- poorman's patch
  Mentzelia gracilenta Torr. & A. Gray -- accepted -- grass blazingstar
  Mentzelia laevicaulis (Hook.) Torr. & A. Gray -- accepted -- blazingstar mentzelia, smoothstem blazingstar
  Mentzelia laevicaulis var. laevicaulis (Hook.) Torr. & A. Gray -- accepted -- smoothstem blazingstar
  Mentzelia lindleyi Torr. & A. Gray -- accepted -- Lindley's blazingstar
  Mentzelia micrantha (Hook. & Arn.) Torr. & A. Gray -- accepted -- San Luis blazingstar
  Mentzelia nuda (Pursh) Torr. & A. Gray -- accepted -- bractless blazingstar, goodmother, stickleaf mentzelia
  Mentzelia nuda var. nuda (Pursh) Torr. & A. Gray -- accepted -- bractless blazingstar
  Mentzelia pumila Nutt. ex Torr. & A. Gray -- accepted -- dwarf blazingstar, dwarf mentzelia, golden blazingstar
  Mentzelia pumila var. pumila Nutt. ex Torr. & A. Gray -- accepted -- dwarf mentzelia, dwarf stickleaf, golden blazingstar
  Mesadenia diversifolia (Torr. & A. Gray) Greene -- not accepted
  Micranthes tolmiei (Torr. & A. Gray) Brouillet & Gornall -- accepted -- alpine saxifrage, Tolmie's saxifrage
  Mikania scandens var. pubescens (Nutt.) Torr. & A. Gray -- not accepted
  Mimosa quadrivalvis var. angustata (Torr. & A. Gray) Barneby -- not accepted
  Mimosa strigillosa Torr. & A. Gray -- accepted -- herbaceous mimosa, powderpuff
  Mimulus glabratus var. jamesii (Torr. & A. Gray ex Benth.) A. Gray -- accepted -- James' monkeyflower
  Mimulus jamesii Torr. & A. Gray ex Benth. -- not accepted
  Minuartia douglasii (Fenzl ex Torr. & A. Gray) Mattf. -- accepted -- Douglas' stitchwort
  Minuartia douglasii var. douglasii (Fenzl ex Torr. & A. Gray) Mattf. -- not accepted -- Douglas' stitchwort
  Mitreola angustifolia (Torr. & A. Gray) J.B. Nelson -- not accepted
  Mitreola petiolata (J.F. Gmel.) Torr. & A. Gray -- accepted -- lax hornpod
  Monoptilon Torr. & A. Gray -- accepted -- desertstar, monoptilon
  Monoptilon bellidiforme Torr. & A. Gray ex A. Gray -- accepted -- daisy desertstar, Mojave desertstar
  Montia heterophylla (Torr. & A. Gray) Jeps. -- not accepted
  Montia perfoliata ssp. glauca (Nutt. ex Torr. & A. Gray) Ferris -- not accepted
  Montia sibirica var. heterophylla (Torr. & A. Gray) B.L. Rob. -- not accepted
  Montia spathulata var. exigua (Torr. & A. Gray) B.L. Rob. -- not accepted
  Montia spathulata var. tenuifolia (Torr. & A. Gray) Munz -- not accepted
  Morongia angustata (Torr. & A. Gray) Britton -- not accepted
  Mulgedium spicatum var. integrifolium (Torr. & A. Gray) Small -- not accepted
  Musineon divaricatum var. hookeri (Torr. & A. Gray) Mathias -- accepted -- Hooker's wildparsley, leafy wild parsley
  Musineon hookeri (Torr. & A. Gray) Nutt. -- not accepted
  Musineon tenuifolium (Nutt. ex Torr. & A. Gray) J.M. Coult. & Rose -- accepted -- slender wildparsley
  Musineum divaricatum (Pursh) Nutt. ex Torr. & A. Gray -- not accepted
  Musineum divaricatum var. hookeri Torr. & A. Gray -- not accepted
  Musineum tenuifolium Nutt. ex Torr. & A. Gray -- not accepted
  Myriophyllum hippuroides Nutt. ex Torr. & A. Gray -- accepted -- western watermilfoil
  Nabalus asperus (Michx.) Torr. & A. Gray -- not accepted
  Nasturtium curvisiliqua (Hook.) Nutt. ex Torr. & A. Gray -- not accepted
  Negundo californica Torr. & A. Gray -- not accepted
  Negundo californicum Torr. & A. Gray -- not accepted
  Nuphar advena var. tomentosa Torr. & A. Gray -- not accepted
  Nuttallia cerasiformis Torr. & A. Gray ex Hook. & Arn. -- not accepted
  Oemleria cerasiformis (Torr. & A. Gray ex Hook. & Arn.) J.W. Landon -- accepted -- Indian plum
  Oenothera biennis var. canescens Torr. & A. Gray -- not accepted
  Oenothera biennis var. hookeri (Torr. & A. Gray) B. Boivin -- not accepted
  Oenothera bistorta Nutt. ex Torr. & A. Gray -- not accepted
  Oenothera boothii var. pygmaea (Douglas ex Lehm.) Torr. & A. Gray -- not accepted
  Oenothera breviflora Torr. & A. Gray -- not accepted
  Oenothera californica (Nutt. ex Torr. & A. Gray) Greene -- not accepted -- California eveningprimrose
  Oenothera coronopifolia Torr. & A. Gray -- accepted -- crownleaf evening primrose, crownleaf evening-primrose, crownleaf eveningprimrose
  Oenothera elata ssp. hookeri (Torr. & A. Gray) W. Dietr. & W.L. Wagner -- accepted -- Hooker's evening primrose, Hooker's evening-primrose
  Oenothera heterophylla var. rhombipetala (Nutt. ex Torr. & A. Gray) Fosberg -- not accepted
  Oenothera hookeri Torr. & A. Gray -- not accepted
  Oenothera jamesii Torr. & A. Gray -- accepted -- James' eveningprimrose, trumpet evening primrose, trumpet evening-primrose
  Oenothera lavandulifolia Torr. & A. Gray -- accepted -- lavenderleaf sundrops
  Oenothera ovata Nutt. ex Torr. & A. Gray -- not accepted
  Oenothera parvula Nutt. ex Torr. & A. Gray -- not accepted
  Oenothera rhombipetala Nutt. ex Torr. & A. Gray -- accepted -- fourpoint evening primrose, fourpoint evening-primrose, fourpoint eveningprimrose, greater four-point evening-primrose
  Oenothera rhombipetala auct. non Nutt. ex Torr. & A. Gray -- not accepted -- fourpoint eveningprimrose
  Oenothera scapoidea Torr. & A. Gray -- not accepted
  Oenothera serrulata ssp. drummondii (Torr. & A. Gray) Munz -- not accepted
  Oenothera spachiana Torr. & A. Gray -- accepted -- Spach's evening primrose, Spach's evening-primrose, Spach's eveningprimrose
  Oenothera strigulosa (Fisch. & C.A. Mey.) Torr. & A. Gray -- not accepted
  Oenothera tanacetifolia Torr. & A. Gray -- not accepted
  Oligoneuron houghtonii (Torr. & A. Gray ex A. Gray) G.L. Nesom -- not accepted -- Houghton's goldenrod
  Oligoneuron nitidum (Torr. & A. Gray) Small -- not accepted -- shiny goldenrod
  Oplopanax (Torr. & A. Gray) Miq. -- accepted
  Opulaster pauciflorus (Torr. & A. Gray) A. Heller -- not accepted
  Opuntia californica (Torr. & A. Gray) Coville -- not accepted -- California pricklypear
  Opuntia californica var. californica (Torr. & A. Gray) Coville -- not accepted -- California pricklypear
  Orbexilum gracile (Torr. & A. Gray) Rydb. -- not accepted
  Orbexilum pedunculatum var. gracile (Torr. & A. Gray) J.W. Grimes -- not accepted
  Orbexilum simplex (Nutt. ex Torr. & A. Gray) Rydb. -- accepted -- simple scurfpea, singlestem leather-root
  Orbexilum stipulatum (Torr. & A. Gray) Rydb. -- accepted -- largestipule leather-root
  Oreostemma alpigenum (Torr. & A. Gray) Greene -- accepted -- alpine aster, tundra aster
  Oreostemma alpigenum var. alpigenum (Torr. & A. Gray) Greene -- accepted -- tundra aster
  Osmaronia cerasiformis (Torr. & A. Gray ex Hook. & Arn.) Greene -- not accepted
  Osmorhiza occidentalis (Nutt. ex Torr. & A. Gray) Torr. -- accepted -- sweetanise, western sweetroot
  Oxytheca perfoliata Torr. & A. Gray -- accepted -- perfoliate oxytheca, round-leaf puncturebract, roundleaf oxytheca
  Oxytheca watsonii Torr. & A. Gray -- accepted -- Watson's oxytheca
  Oxytropis deflexa ssp. sericea (Torr. & A. Gray) Cody -- not accepted
  Oxytropis deflexa var. sericea Torr. & A. Gray -- accepted -- blue nodding locoweed, longstem hangpod crazyweed, pendant-pod locoweed
  Oxytropis sericea var. speciosa (Torr. & A. Gray) S.L. Welsh -- accepted -- white locoweed
  Packera eurycephala (Torr. & A. Gray) W.A. Weber & Á. Löve -- accepted -- widehead groundsel
  Packera eurycephala var. eurycephala (Torr. & A. Gray) W.A. Weber & Á. Löve -- accepted -- widehead groundsel
  Packera millefolia (Torr. & A. Gray) W.A. Weber & Á. Löve -- accepted -- piedmont ragwort
  Packera multilobata (Torr. & A. Gray ex A. Gray) W.A. Weber & Á. Löve -- accepted -- lobeleaf groundsel
  Palafoxia callosa (Nutt.) Torr. & A. Gray -- accepted -- small palafox, small palafoxia
  Palafoxia hookerana Torr. & A. Gray -- not accepted
  Palafoxia hookeriana Torr. & A. Gray -- accepted -- sand palafox, showy palafoxia
  Palafoxia hookeriana var. hookeriana Torr. & A. Gray -- not accepted -- sand palafox
  Palafoxia integrifolia (Nutt.) Torr. & A. Gray -- accepted -- coastal plain palafox, coastalplain palafox
  Paronychia baldwinii (Torr. & A. Gray) Fenzl ex Walp. -- accepted -- Baldwin's nailwort
  Paronychia baldwinii ssp. baldwinii (Torr. & A. Gray) Fenzl ex Walp. -- not accepted -- Baldwin's nailwort
  Paronychia depressa (Torr. & A. Gray) Nutt. ex A. Nelson -- accepted -- spreading nailwort
  Paronychia depressa var. depressa (Torr. & A. Gray) Nutt. ex A. Nelson -- not accepted -- spreading nailwort
  Paronychia drummondii Torr. & A. Gray -- accepted -- Drummond's nailwort
  Paronychia drummondii var. drummondii Torr. & A. Gray -- not accepted
  Paronychia jamesii Torr. & A. Gray -- accepted -- James' nailwort, nailwort
  Paronychia setacea Torr. & A. Gray -- accepted -- bristle nailwort
  Paronychia setacea var. setacea Torr. & A. Gray -- not accepted -- bristle nailwort
  Parryella Torr. & A. Gray ex A. Gray -- accepted
  Parryella filifolia Torr. & A. Gray ex A. Gray -- accepted -- common dunebroom, dune broom
  Parthenium alpinum (Nutt.) Torr. & A. Gray -- accepted -- alpine feverfew, Arkansas River feverfew
  Pediomelum digitatum (Nutt. ex Torr. & A. Gray) Isely -- accepted -- palmleaf Indian breadroot
  Pediomelum linearifolium (Torr. & A. Gray) J.W. Grimes -- accepted -- narrowleaf Indian breadroot, slimleaf scurfpea
  Pediomelum rhombifolium (Torr. & A. Gray) Rydb. -- accepted -- Gulf Indian breadroot, roundleaf scurfpea
  Pediomelum subacaule (Torr. & A. Gray) Rydb. -- accepted -- whiterim scurfpea
  Pediomelum subacaulis (Torr. & A. Gray) Rydb. -- not accepted
  Penstemon deustus ssp. heterander (Torr. & A. Gray) Pennell & D.D. Keck -- not accepted
  Penstemon deustus var. heterander (Torr. & A. Gray) Cronquist -- not accepted
  Penstemon fendleri Torr. & A. Gray -- accepted -- Fendler's beardtongue, Fendler's penstemon
  Penstemon fremontii Torr. & A. Gray -- accepted -- Fremont's beardtongue, Fremont's penstemon
  Penstemon fremontii var. fremontii Torr. & A. Gray -- accepted -- Fremont's beardtongue
  Pentodon halei (Torr. & A. Gray) A. Gray -- not accepted
  Petalostemon albidus (Torr. & A. Gray) Small -- not accepted
  Petalostemon carneus var. albidus Torr. & A. Gray -- not accepted
  Petalostemon emarginatus Torr. & A. Gray -- not accepted
  Petalostemon griseus Torr. & A. Gray -- not accepted
  Petalostemon microphyllus (Torr. & A. Gray) A. Heller -- not accepted
  Petalostemon obovatus Torr. & A. Gray -- not accepted
  Petalostemon phleoides Torr. & A. Gray -- not accepted
  Petalostemon phleoides var. microphyllus Torr. & A. Gray -- not accepted
  Petrophytum (Nutt. ex Torr. & A. Gray) Rydb. -- accepted -- rockspirea
  Peucedanum ambiguum (Nutt.) Nutt. ex Torr. & A. Gray -- not accepted
  Peucedanum macrocarpum Nutt. ex Torr. & A. Gray -- not accepted
  Phaca neglecta Torr. & A. Gray -- not accepted
  Phacelia humilis Torr. & A. Gray -- accepted -- low phacelia
  Phacelia humilis var. humilis Torr. & A. Gray -- accepted -- low phacelia
  Phacelia popei Torr. & A. Gray -- accepted -- Pope's phacelia, Pope's scorpionweed
  Phaseolus leiospermus Torr. & A. Gray -- not accepted
  Phaseolus polystachios var. sinuatus (Nutt. ex Torr. & A. Gray) R. Marechal, J.M. Mascherpa & F. Stainier -- accepted -- thicket bean
  Phaseolus sinuatus Nutt. ex Torr. & A. Gray -- not accepted
  Phellopterus montanus Nutt. ex Torr. & A. Gray (pro. syn.) -- not accepted
  Philadelphus oreganus Nutt. ex Torr. & A. Gray -- not accepted -- Oregon mock orange
  Phlox canescens Torr. & A. Gray -- not accepted
  Phlox hoodii ssp. canescens (Torr. & A. Gray) Wherry -- accepted -- carpet phlox
  Phlox hoodii var. canescens (Torr. & A. Gray) M. Peck -- not accepted
  Phoebanthus grandiflora (Torr. & A. Gray) S.F. Blake -- not accepted
  Phoebanthus grandiflorus (Torr. & A. Gray) S.F. Blake -- accepted -- Florida false sunflower
  Phoebanthus tenuifolia (Torr. & A. Gray) S.F. Blake -- not accepted
  Phoebanthus tenuifolius (Torr. & A. Gray) S.F. Blake -- accepted -- pineland false sunflower
  Physaria (Nutt. ex Torr. & A. Gray) A. Gray -- accepted -- twinpod
  Physaria angustifolia (Nutt. ex Torr. & A. Gray) O'Kane & Al-Shehbaz -- accepted -- threadleaf bladderpod
  Physaria gracilis ssp. nuttallii (Torr. & A. Gray) O'Kane & Al-Shehbaz -- accepted -- Nuttall's bladderpod
  Physaria pallida (Torr. & A. Gray) O'Kane & Al-Shehbaz -- accepted -- white bladderpod
  Physocarpus pauciflorus (Torr. & A. Gray) Piper -- not accepted
  Pityopsis oligantha (Chapm. ex Torr. & A. Gray) Small -- accepted -- grassleaf goldaster
  Plectritis macrocera Torr. & A. Gray -- accepted -- longhorn plectritis, white cornsalad
  Plectritis macrocera ssp. macrocera Torr. & A. Gray -- accepted -- longhorn plectritis
  Polanisia dodecandra ssp. trachysperma (Torr. & A. Gray) Iltis -- accepted -- clammyweed, red-whisker clammyweed, sandyseed clammyweed, western clammyweed
  Polanisia dodecandra var. trachysperma (Torr. & A. Gray) Iltis -- not accepted
  Polanisia jamesii (Torr. & A. Gray) Iltis -- accepted -- James' clammyweed
  Polanisia tenuifolia Torr. & A. Gray -- accepted -- slenderleaf clammyweed
  Polanisia trachysperma Torr. & A. Gray -- not accepted
  Polygala balduinii var. chlorgena Torr. & A. Gray -- not accepted
  Polygala chapmanii Torr. & A. Gray -- accepted -- Chapman's milkwort
  Polygala grandiflora var. angustifolia Torr. & A. Gray -- not accepted -- showy milkwort
  Polygala hookeri Torr. & A. Gray -- accepted -- Hooker's milkwort
  Polygala leptocaulis Torr. & A. Gray -- accepted -- swamp milkwort
  Polygala nuttallii Torr. & A. Gray -- accepted -- Nuttall's milkwort
  Polygala senega var. latifolia Torr. & A. Gray -- not accepted -- Seneca snakeroot
  Polypteris hookeriana (Torr. & A. Gray) A. Gray -- not accepted
  Pomaria jamesii (Torr. & A. Gray) Walp. -- accepted -- James' holdback
  Populus balsamifera ssp. trichocarpa (Torr. & A. Gray) Brayshaw -- not accepted -- balsam poplar, black cottonwood
  Populus trichocarpa Torr. & A. Gray ex Hook. -- accepted -- black cottonwood
  Potentilla anserina var. grandis Torr. & A. Gray -- not accepted
  Potentilla canadensis var. pumila (Poir.) Torr. & A. Gray -- not accepted
  Potentilla canadensis var. simplex (Michx.) Torr. & A. Gray -- not accepted
  Potentilla effusa var. gossypina Nutt. ex Torr. & A. Gray -- not accepted
  Potentilla egedii ssp. grandis (Torr. & A. Gray) Hultén -- not accepted
  Potentilla egedii var. grandis (Torr. & A. Gray) J.T. Howell -- not accepted
  Potentilla flabellifolia Hook. ex Torr. & A. Gray -- accepted -- high mountain cinquefoil, Mount Rainier cinquefoil
  Potentilla gracilis var. flabelliformis (Lehm.) Nutt. ex Torr. & A. Gray -- accepted -- fanleaf cinquefoil, slender cinquefoil
  Potentilla pensylvanica var. bipinnatifida (Douglas ex Hook.) Torr. & A. Gray -- not accepted
  Potentilla pentandra Engelm. ex Torr. & A. Gray -- not accepted
  Potentilla rivalis var. pentandra (Engelm. ex Torr. & A. Gray) S. Watson -- not accepted -- brook cinquefoil, cinquefoil
  Prenanthes barbata (Torr. & A. Gray) Milstead -- accepted -- barbed rattlesnakeroot
  Prenanthes serpentaria var. barbata Torr. & A. Gray -- not accepted
  Prunus americana var. mollis (Torr.) Torr. & A. Gray -- not accepted
  Prunus glandulosa (Hook.) Torr. & A. Gray -- not accepted
  Psoralea digitata Nutt. ex Torr. & A. Gray -- not accepted
  Psoralea floribunda Nutt. ex Torr. & A. Gray -- not accepted
  Psoralea linearifolia Torr. & A. Gray -- not accepted
  Psoralea obtusifolia Torr. & A. Gray -- not accepted
  Psoralea psoralioides var. gracilis (Torr. & A. Gray) F.L. Freeman -- not accepted
  Psoralea rhombifolia Torr. & A. Gray -- not accepted
  Psoralea simplex Nutt. ex Torr. & A. Gray -- not accepted
  Psoralea stipulata Torr. & A. Gray -- not accepted
  Psoralea subacaulis Torr. & A. Gray -- not accepted
  Psoralea tenuiflora var. floribunda (Nutt. ex Torr. & A. Gray) Rydb. -- not accepted
  Psoralidium digitatum (Nutt. ex Torr. & A. Gray) Rydb. -- not accepted
  Psoralidium linearifolium (Torr. & A. Gray) Rydb. -- not accepted
  Ptelea baldwinii Torr. & A. Gray -- not accepted
  Ptelea trifoliata var. mollis Torr. & A. Gray -- accepted -- common hoptree
  Pteryxia (Nutt. ex Torr. & A. Gray) Nutt. ex J.M. Coult. & Rose -- accepted -- springparsley, wavewing
  Pteryxia terebinthina var. albiflora (Torr. & A. Gray) Mathias -- not accepted -- smoothshore springparsley, turpentine wavewing
  Pteryxia terebinthina var. foeniculacea (Torr. & A. Gray) Mathias -- accepted -- turpentine wavewing
  Ptilocalyx greggii Torr. & A. Gray -- not accepted
  Pycnanthemum albescens Torr. & A. Gray -- accepted -- whiteleaf mountainmint
  Pycnanthemum clinopodioides Torr. & A. Gray -- accepted -- basil mountainmint
  Pycnanthemum clinopodopodes Torr. & A. Gray -- not accepted
  Pyrola uliginosa Torr. & A. Gray ex Torr. -- not accepted
  Pyrrocoma racemosa (Nutt.) Torr. & A. Gray -- accepted -- clustered goldenweed
  Pyrrocoma racemosa var. racemosa (Nutt.) Torr. & A. Gray -- accepted -- clustered goldenweed
  Quercus gunnisonii (Torr. & A. Gray) Rydb. -- not accepted
  Raimannia rhombipetala (Nutt. ex Torr. & A. Gray) Rose -- not accepted
  Ranunculus flammula var. laxicaulis Torr. & A. Gray -- not accepted
  Ranunculus laxicaulis (Torr. & A. Gray) Darby -- accepted -- Mississippi buttercup
  Ranunculus laxicaulis var. laxicaulis (Torr. & A. Gray) Darby -- not accepted -- Mississippi buttercup
  Ranunculus reptans var. intermedius (Hook.) Torr. & A. Gray -- not accepted
  Ranunculus reptans var. ovalis (Bigelow) Torr. & A. Gray -- not accepted
  Ratibida peduncularis (Torr. & A. Gray) Barnhart -- accepted -- naked Mexicanhat, naked prairie coneflower
  Ratibida peduncularis var. peduncularis (Torr. & A. Gray) Barnhart -- accepted -- naked Mexicanhat
  Rhododendron occidentale (Torr. & A. Gray) A. Gray -- accepted -- California azalea, Sonoma azalea, western azalea
  Rhododendron occidentale var. occidentale (Torr. & A. Gray) A. Gray -- not accepted -- western azalea
  Rhus diversiloba Torr. & A. Gray -- not accepted
  Rhynchosia intermedia (Torr. & A. Gray) Small -- not accepted
  Rhynchosia latifolia Nutt. ex Torr. & A. Gray -- accepted -- broadleaf snoutbean, prairie snoutbean
  Rhynchosia senna var. texana (Torr. & A. Gray) M.C. Johnst. -- accepted -- rosary bean, Texas snoutbean
  Rhynchosia texana Torr. & A. Gray -- not accepted
  Rhynchosia tomentosa var. erecta (Walter) Torr. & A. Gray -- not accepted
  Rhynchosia tomentosa var. mollissima (Elliott) Torr. & A. Gray -- accepted -- twining snoutbean
  Rhynchosia tomentosa var. monophylla (Michx.) Torr. & A. Gray -- not accepted
  Rhynchosia tomentosa var. volubilis (Michx.) Torr. & A. Gray -- not accepted
  Richardia tricocca (Torr. & A. Gray) Standl. -- accepted -- prairie Mexican clover
  Richardia tricocco (Torr. & A. Gray) Standl. -- not accepted
  Rosa foliolosa Nutt. ex Torr. & A. Gray -- accepted -- white prairie rose
  Rosa setigera var. glabra Torr. & A. Gray -- not accepted
  Rosa setigera var. tomentosa Torr. & A. Gray -- not accepted -- climbing rose
  Rubus flagellaris var. humifusus (Torr. & A. Gray) B. Boivin -- not accepted
  Rubus leucodermis Douglas ex Torr. & A. Gray -- accepted -- western raspberry, whitebark raspberry
  Rubus leucodermis var. leucodermis Douglas ex Torr. & A. Gray -- not accepted -- whitebark raspberry
  Rubus occidentalis var. leucodermis (Douglas ex Torr. & A. Gray) Focke -- not accepted
  Rudbeckia alismifolia Torr. & A. Gray -- not accepted
  Rudbeckia graminifolia (Torr. & A. Gray) C.L. Boynt. & Beadle -- accepted -- grassleaf coneflower
  Rudbeckia grandiflora var. alismifolia (Torr. & A. Gray) Cronquist -- accepted -- rough coneflower
  Rudbeckia heliopsidis Torr. & A. Gray -- accepted -- sunfacing coneflower
  Rudbeckia heterophylla Torr. & A. Gray -- not accepted
  Rudbeckia laciniata var. heterophylla (Torr. & A. Gray) Fernald & B.G. Schub. -- accepted
  Rudbeckia pinnatiloba (Torr. & A. Gray) Beadle -- not accepted
  Rudbeckia triloba var. pinnatiloba Torr. & A. Gray -- accepted -- browneyed Susan
  Rydbergia grandiflora (Torr. & A. Gray ex A. Gray) Greene -- not accepted
  Sabatia lanceolata (Walter) Torr. & A. Gray -- not accepted
  Sabulina brevifolia (Nutt. ex Torr. & A. Gray) Small -- not accepted
  Sagina decumbens (Elliott) Torr. & A. Gray -- accepted -- beach pearlwort, trailing pearlwort
  Sagina decumbens ssp. decumbens (Elliott) Torr. & A. Gray -- accepted -- trailing pearlwort
  Sambucus pubens var. arborescens Torr. & A. Gray -- not accepted
  Sambucus racemosa ssp. pubens var. arborescens (Torr. & A. Gray) A. Gray -- not accepted
  Sambucus racemosa ssp. pubens var. leucocarpa (Torr. & A. Gray) Cronquist -- not accepted
  Sambucus racemosa var. arborescens (Torr. & A. Gray) A. Gray -- accepted -- Pacific red elder
  Sambucus racemosa var. leucocarpa (Torr. & A. Gray) Cronquist -- accepted -- European red elderberry
  Saxifraga sullivantii Torr. & A. Gray -- not accepted
  Saxifraga tolmiei Torr. & A. Gray -- not accepted -- alpine saxifrage, Tolmie's saxifrage
  Schrankia angustata Torr. & A. Gray -- not accepted
  Selenia dissecta Torr. & A. Gray -- accepted -- Texas selenia
  Senecio aureus var. borealis Torr. & A. Gray -- not accepted
  Senecio cymbalarioides var. borealis (Torr. & A. Gray) Greenm. -- not accepted
  Senecio douglasii var. jamesii (Torr. & A. Gray) Ediger ex Correll & M.C. Johnst. -- not accepted
  Senecio eurycephalus Torr. & A. Gray -- not accepted -- widehead groundsel
  Senecio eurycephalus var. eurycephalus Torr. & A. Gray -- not accepted -- Siskiyou ragwort
  Senecio fremontii Torr. & A. Gray -- accepted -- dwarf mountain ragwort, Fremont's groundsel
  Senecio fremontii var. fremontii Torr. & A. Gray -- accepted -- dwarf mountain ragwort
  Senecio hookeri Torr. & A. Gray -- not accepted
  Senecio millefolium Torr. & A. Gray -- not accepted -- piedmont ragwort
  Senecio millefolius Torr. & A. Gray -- not accepted
  Senecio multilobatus Torr. & A. Gray ex A. Gray -- not accepted -- lobeleaf groundsel
  Senecio obovatus var. elliottii (Torr. & A. Gray) Fernald -- not accepted
  Senecio riddellii Torr. & A. Gray -- accepted -- Riddell's groundsel, Riddell's ragwort, sand groundsel
  Senecio spartioides Torr. & A. Gray -- accepted -- broom groundsel, broom-like ragwort, broomlike ragwort
  Senecio spartioides var. fremontii (Torr. & A. Gray) Greenm. -- not accepted
  Senecio spartioides var. spartioides Torr. & A. Gray -- not accepted -- broom-like ragwort
  Senecio streptanthifolius var. borealis (Torr. & A. Gray) J.F. Bain -- not accepted -- Rocky Mountain groundsel
  Sherwoodia galacifolia (Torr. & A. Gray) House -- not accepted
  Shortia Torr. & A. Gray -- accepted
  Shortia galacifolia Torr. & A. Gray -- accepted -- Oconee bells, Oconee-bells
  Shortia galacifolia var. galacifolia Torr. & A. Gray -- accepted -- Oconee bells
  Sida elliottii Torr. & A. Gray -- accepted -- Elliott's fanpetals
  Sida elliottii var. elliottii Torr. & A. Gray -- accepted -- Elliott's fanpetals
  Sida filicaulis Torr. & A. Gray -- not accepted
  Sida texana (Torr. & A. Gray) Small -- not accepted
  Sidalcea diploscypha (Torr. & A. Gray) A. Gray -- accepted -- fringed checkerbloom
  Sidalcea malviflora ssp. californica (Nutt. ex Torr. & A. Gray) C.L. Hitchc. -- accepted -- California checkerbloom
  Sidalcea malviflora var. californica (Nutt. ex Torr. & A. Gray) Jeps. -- not accepted
  Sidalcea oregana (Nutt. ex Torr. & A. Gray) A. Gray -- accepted -- Oregon checkerbloom, Oregon checkermallow
  Sidalcea oregana ssp. oregana (Nutt. ex Torr. & A. Gray) A. Gray -- accepted -- Oregon checkerbloom, Oregon checkermallow
  Sidalcea oregana ssp. oregana var. oregana (Nutt. ex Torr. & A. Gray) A. Gray -- not accepted -- Oregon checkerbloom, Oregon checkermallow
  Sidalcea oregana var. oregana (Nutt. ex Torr. & A. Gray) A. Gray -- not accepted -- Oregon checkerbloom
  Silphium compositum ssp. ovatifolium (Torr. & A. Gray) Sweeny & T.R. Fisher -- not accepted
  Silphium compositum var. ovatifolium Torr. & A. Gray -- not accepted -- kidneyleaf rosinweed
  Silphium compositum var. reniforme (Raf. ex Nutt.) Torr. & A. Gray -- not accepted -- kidneyleaf rosinweed
  Silphium integrifolium var. laeve Torr. & A. Gray -- accepted -- wholeleaf rosinweed
  Silphium ovatifolium (Torr. & A. Gray) Small -- not accepted
  Siphonychia americana (Nutt.) Torr. & A. Gray -- not accepted
  Sisymbrium linifolium (Nutt.) Nutt. ex Torr. & A. Gray -- accepted -- flaxleaf plainsmustard
  Solidago amplexicaulis Torr. & A. Gray ex A. Gray non M. Martens -- not accepted
  Solidago angusta Torr. & A. Gray -- not accepted
  Solidago bicolor var. concolor Torr. & A. Gray -- not accepted
  Solidago boothii var. brachyphylla (Chapm. ex Torr. & A. Gray) A. Gray -- not accepted
  Solidago boottii var. brachyphylla (Chapm. ex Torr. & A. Gray) A. Gray -- not accepted
  Solidago brachyphylla Chapm. ex Torr. & A. Gray -- accepted -- Dixie goldenrod
  Solidago buckleyi Torr. & A. Gray -- accepted -- Buckley's goldenrod
  Solidago caesia var. curtisii (Torr. & A. Gray) Alph. Wood -- not accepted -- mountain decumbent goldenrod
  Solidago canadensis var. scabra Torr. & A. Gray -- not accepted -- Canada goldenrod, Canadian goldenrod
  Solidago curtisii Torr. & A. Gray -- accepted -- mountain decumbent goldenrod
  Solidago curtisii var. curtisii Torr. & A. Gray -- accepted
  Solidago drummondii Torr. & A. Gray -- accepted -- Drummond's goldenrod
  Solidago elliottii Torr. & A. Gray -- not accepted
  Solidago gracillima Torr. & A. Gray -- not accepted -- Virginia goldenrod
  Solidago houghtonii Torr. & A. Gray ex A. Gray -- accepted -- Houghton's goldenrod
  Solidago lancifolia Torr. & A. Gray -- accepted -- lance-leaf goldenrod
  Solidago leavenworthii Torr. & A. Gray -- accepted -- Leavenworth's goldenrod
  Solidago leptocephala Torr. & A. Gray -- not accepted
  Solidago monticola Torr. & A. Gray -- not accepted
  Solidago neglecta Torr. & A. Gray -- not accepted
  Solidago nitida Torr. & A. Gray -- accepted -- shiny goldenrod
  Solidago occidentalis (Nutt.) Torr. & A. Gray -- not accepted
  Solidago patula ssp. strictula Torr. & A. Gray -- accepted -- roundleaf goldenrod
  Solidago patula var. strictula Torr. & A. Gray -- not accepted -- roundleaf goldenrod
  Solidago petiolaris var. angusta (Torr. & A. Gray) A. Gray -- not accepted -- downy ragged goldenrod
  Solidago ptarmicoides (Torr. & A. Gray) B. Boivin -- accepted -- prairie goldenrod, upland white aster, verge-d'or faux-ptarmica, white flat-top goldenrod
  Solidago rigidiuscula (Torr. & A. Gray) Porter -- not accepted
  Solidago roanensis var. monticola (Torr. & A. Gray) Fernald -- not accepted
  Solidago scaberrima Torr. & A. Gray -- not accepted
  Solidago shortii Torr. & A. Gray -- accepted -- Short's goldenrod
  Solidago speciosa var. angustata Torr. & A. Gray -- not accepted
  Solidago speciosa var. rigidiuscula Torr. & A. Gray -- accepted -- showy goldenrod
  Solidago stricta ssp. gracillima (Torr. & A. Gray) Semple -- accepted -- Virginia goldenrod
  Solidago uliginosa var. linoides (Torr. & A. Gray) Fernald -- not accepted -- bog goldenrod
  Solidago uliginosa var. neglecta (Torr. & A. Gray) Fernald -- not accepted
  Solidago uliginosa var. terrae-novae (Torr. & A. Gray) Fernald -- not accepted -- bog goldenrod
  Solidago verna M.A. Curtis ex Torr. & A. Gray -- accepted -- springflowering goldenrod
  Sophora affinis Torr. & A. Gray -- not accepted -- Eve's necklacepod, Texas sophora
  Sophora tomentosa var. truncata Torr. & A. Gray -- accepted -- yellow necklacepod
  Sphaeralcea coccinea ssp. dissecta (Nutt. ex Torr. & A. Gray) Kearney -- not accepted
  Sphaeralcea coccinea var. dissecta (Nutt. ex Torr. & A. Gray) Garrett -- not accepted
  Spigelia loganioides (Torr. & A. Gray ex Endl. & Fenzl) A. DC. -- accepted -- Florida pinkroot
  Spigelia texana (Torr. & A. Gray) A. DC. -- accepted -- Texas pinkroot
  Spiraea pectinata (Pursh) Torr. & A. Gray -- not accepted
  Stellaria borealis var. crispa (Cham. & Schltdl.) Fenzl ex Torr. & A. Gray -- not accepted
  Stellaria nuttallii Torr. & A. Gray -- not accepted
  Stenandrium barbatum Torr. & A. Gray -- accepted -- early shaggytuft
  Strophostyles leiosperma (Torr. & A. Gray) Piper -- accepted -- slick-seed fuzzy-bean, slickseed fuzzybean, smoothseed wildbean
  Styphnolobium affine (Torr. & A. Gray) Walp. -- accepted -- Eve's necklacepod
  Sullivantia Torr. & A. Gray ex A. Gray -- accepted -- coolwort
  Sullivantia ohionis Torr. & A. Gray ex A. Gray -- not accepted
  Sullivantia sullivantii (Torr. & A. Gray) Britton -- accepted -- Sullivant's coolwort
  Symphyotrichum anomalum (Engelm. ex Torr. & A. Gray) G.L. Nesom -- accepted -- manyray aster
  Symphyotrichum boreale (Torr. & A. Gray) A. Löve & D. Löve -- accepted -- northern bog aster
  Symphyotrichum chapmanii (Torr. & A. Gray) Semple & Brouillet -- accepted -- savannah aster
  Symphyotrichum dumosum var. strictior (Torr. & A. Gray) G.L. Nesom -- accepted -- rice button aster
  Symphyotrichum dumosum var. subulifolium (Torr. & A. Gray) G.L. Nesom -- accepted -- rice button aster
  Symphyotrichum elliotii (Torr. & A. Gray) G.L. Nesom -- accepted -- Elliott's aster
  Symphyotrichum ericoides var. stricticaule (Torr. & A. Gray) G.L. Nesom -- not accepted -- white heath aster
  Symphyotrichum falcatum var. commutatum (Torr. & A. Gray) G.L. Nesom -- accepted -- white prairie aster
  Symphyotrichum novi-belgii var. elodes (Torr. & A. Gray) G.L. Nesom -- accepted -- New York aster
  Symphyotrichum spathulatum var. fremontii (Torr. & A. Gray) G.L. Nesom -- not accepted
  Taenidia (Torr. & A. Gray) Drude -- accepted
  Tanacetum capitatum (Nutt.) Torr. & A. Gray -- not accepted
  Tanacetum nuttallii Torr. & A. Gray -- not accepted
  Taraxia (Nutt. ex Torr. & A. Gray) Raim. -- accepted
  Taraxia breviflora (Torr. & A. Gray) Nutt. ex Small -- accepted -- fewflower evening primrose
  Taraxia tanacetifolia (Torr. & A. Gray) Piper -- accepted -- tansyleaf evening primrose
  Tauschia arguta (Torr. & A. Gray) J.F. Macbr. -- accepted -- southern umbrellawort
  Tephrosia flexuosa (Vail) Chapm. ex Torr. & A. Gray -- not accepted
  Tephrosia spicata (Walter) Torr. & A. Gray -- accepted -- spiked hoarypea
  Tephrosia virginiana var. glabra Nutt. ex Torr. & A. Gray -- not accepted
  Tephrosia virginiana var. holosericea (Nutt.) Torr. & A. Gray -- not accepted
  Tetradymia glabrata Torr. & A. Gray -- accepted -- littleleaf horsebrush
  Tetradymia nuttallii Torr. & A. Gray -- accepted -- Nuttall's horsebrush
  Tetragonotheca ludoviciana (Torr. & A. Gray) A. Gray ex H.M. Hall -- accepted -- Louisiana nerveray
  Tetragonothela ludoviciana (Torr. & A. Gray) A. Gray ex H.M. Hall -- not accepted
  Tetraneuris depressa (Torr. & A. Gray ex A. Gray) Greene -- not accepted -- flat four-nerve daisy
  Tetraneuris grandiflora (Torr. & A. Gray ex A. Gray) K.F. Parker -- not accepted -- graylocks four-nerve daisy
  Thelypodium sagittatum (Nutt. ex Torr. & A. Gray) Endl. ex Walp. -- accepted -- arrow thelypody, slender thelypody
  Thelypodium sagittatum ssp. sagittatum (Nutt. ex Torr. & A. Gray) Endl. ex Walp. -- accepted -- arrow thelypody
  Thermopsis fraxinifolia (Nutt. ex Torr. & A. Gray) M.A. Curtis -- accepted -- ashleaf goldenbanner
  Tillaea aquatica var. drummondii sensu (Torr. & A. Gray) Jeps. -- not accepted
  Tillaea aquatica var. drummondii (Torr. & A. Gray) Jeps. -- not accepted
  Tillaea drummondii Torr. & A. Gray -- not accepted
  Tillaeastrum drummondii sensu (Torr. & A. Gray) Britton -- not accepted
  Tillaeastrum drummondii (Torr. & A. Gray) Britton -- not accepted
  Tiquilia greggii (Torr. & A. Gray) A.T. Richardson -- accepted -- Gregg's coldenia, plumed crinklemat
  Tiquilia hispidissima (Torr. & A. Gray) A.T. Richardson -- accepted -- hairy coldenia, hairy crinklemat
  Tithymalopsis wrightii (Torr. & A. Gray) Small -- not accepted
  Tolmiea Torr. & A. Gray -- accepted -- pig-a-back plant, youth on age
  Tolmiea menziesii (Pursh) Torr. & A. Gray -- accepted -- youth on age
  Tonestus pygmaeus (Torr. & A. Gray) A. Nelson -- accepted -- pygmy goldenweed
  Toxicodendron diversilobum (Torr. & A. Gray) Greene -- accepted -- Pacific poison oak
  Toxicodendron radicans ssp. diversilobum (Torr. & A. Gray) Thorne -- not accepted
  Trichocoronis wrightii (Torr. & A. Gray) A. Gray -- accepted -- limestone bugheal, river bugheal
  Trichocoronis wrightii var. wrightii (Torr. & A. Gray) A. Gray -- not accepted
  Trifolium albopurpureum Torr. & A. Gray -- accepted -- rancheria clover
  Trifolium amphianthum Torr. & A. Gray -- not accepted
  Trifolium amplectens Torr. & A. Gray -- not accepted
  Trifolium dasyphyllum Torr. & A. Gray -- accepted -- alpine clover, Uinta clover, whiproot clover
  Trifolium dasyphyllum ssp. dasyphyllum Torr. & A. Gray -- accepted -- alpine clover
  Trifolium depauperatum var. amplectens (Torr. & A. Gray) S. Watson -- accepted -- balloon sack clover
  Trifolium gracilentum Torr. & A. Gray -- accepted -- pin-point clover, pinpoint clover
  Trifolium gracilentum var. gracilentum Torr. & A. Gray -- accepted -- pinpoint clover
  Trifolium heterodon Torr. & A. Gray -- not accepted
  Trifolium involucratum var. heterodon (Torr. & A. Gray) S. Watson -- not accepted
  Trifolium macraei var. albopurpureum (Torr. & A. Gray) Greene -- not accepted
  Troximon glaucum var. dasycephalum Torr. & A. Gray -- not accepted
  Urachne canadensis Torr. & A. Gray ex Trin. & Rupr. -- not accepted
  Valeriana ciliata Torr. & A. Gray -- not accepted
  Valeriana edulis Nutt. ex Torr. & A. Gray -- accepted -- edible valerian, tobacco root, tobaccoroot
  Valeriana edulis ssp. ciliata (Torr. & A. Gray) F.G. Mey. -- not accepted
  Valeriana edulis var. ciliata (Torr. & A. Gray) Cronquist -- accepted -- tobacco root
  Valeriana edulis var. edulis Nutt. ex Torr. & A. Gray -- accepted -- tobacco root
  Valeriana sitchensis ssp. uliginosa (Torr. & A. Gray) F.G. Mey. -- accepted -- marsh valerian, valériane de Sitka sous-espčce des tourbičres
  Valeriana sitchensis var. uliginosa (Torr. & A. Gray) B. Boivin -- not accepted
  Valeriana uliginosa (Torr. & A. Gray) Rydb. -- not accepted -- mountain valerian
  Valerianella longiflora (Torr. & A. Gray) Walp. -- accepted -- longtube cornsalad, tubeflower cornsalad
  Valerianella nuttallii (Torr. & A. Gray) Walp. -- accepted -- Nuttall's cornsalad
  Valerianella woodsiana (Torr. & A. Gray) Walp. -- not accepted -- Woods' cornsalad
  Vernonia gigantea ssp. ovalifolia (Torr. & A. Gray) Urbatsch -- not accepted -- giant ironweed
  Vernonia ovalifolia Torr. & A. Gray -- not accepted
  Vesicaria grandiflora var. pallida Torr. & A. Gray -- not accepted
  Viburnum cassinoides var. angustifolium (Torr. & A. Gray) Shinners -- not accepted
  Viburnum dentatum var. scabrellum Torr. & A. Gray -- not accepted -- southern arrowwood
  Viburnum nudum var. angustifolium Torr. & A. Gray -- not accepted
  Viburnum nudum var. cassinoides (L.) Torr. & A. Gray -- accepted -- possumhaw, withe-rod
  Viburnum pauciflorum Bach. Pyl. ex Torr. & A. Gray -- not accepted
  Viburnum prunifolium var. ferrugineum Torr. & A. Gray -- not accepted
  Viburnum scabrellum (Torr. & A. Gray) Chapm. -- not accepted
  Vicia leavenworthii Nutt. ex Torr. & A. Gray -- not accepted
  Vicia ludoviciana Nutt. ex Torr. & A. Gray -- accepted -- deerpea vetch, Louisiana vetch, slim vetch
  Vicia ludoviciana ssp. leavenworthii (Nutt. ex Torr. & A. Gray) Lassetter & C.R. Gunn -- not accepted -- Leavenworth's vetch
  Vicia ludoviciana ssp. ludoviciana Nutt. ex Torr. & A. Gray -- not accepted -- Louisiana vetch, slim vetch
  Vicia ludoviciana var. leavenworthii (Nutt. ex Torr. & A. Gray) Broich -- accepted -- Leavenworth's vetch
  Vicia ludoviciana var. ludoviciana Nutt. ex Torr. & A. Gray -- accepted -- Louisiana vetch
  Vicia ludoviciana var. texana (Torr. & A. Gray) Shinners -- not accepted
  Vicia micrantha Nutt. ex Torr. & A. Gray -- not accepted
  Vicia sparsifolia Nutt. ex Torr. & A. Gray -- not accepted
  Vicia texana (Torr. & A. Gray) Small -- not accepted
  Viola beckwithii Torr. & A. Gray -- accepted -- Beckwith's violet
  Viola beckwithii ssp. beckwithii Torr. & A. Gray -- not accepted -- Beckwith's violet
  Viola canadensis var. corymbosa Nutt. ex Torr. & A. Gray -- not accepted -- Canadian white violet
  Viola ocellata Torr. & A. Gray -- accepted -- pinto violet
  Viola pedunculata Torr. & A. Gray -- accepted -- Johnny-jump-up
  Viola pedunculata ssp. pedunculata Torr. & A. Gray -- accepted -- Johnny-jump-up
  Viola primulifolia var. acuta (Bigelow) Torr. & A. Gray -- not accepted
  Viola pubescens var. scabriuscula Torr. & A. Gray -- accepted -- downy yellow violet
  Viola sagittata var. ovata (Nutt.) Torr. & A. Gray -- accepted -- arrowleaf violet
  Viorna baldwinii (Torr. & A. Gray) Small -- not accepted
  Viorna pitcheri (Torr. & A. Gray) Britton -- not accepted
  Waldsteinia lobata (Baldwin) Torr. & A. Gray -- accepted -- piedmont barren strawberry
  Waldstenia lobata (Baldwin) Torr. & A. Gray -- not accepted
  Wisteria frutescens var. macrostachya Torr. & A. Gray -- not accepted
  Wisteria macrostachya (Torr. & A. Gray) Nutt. ex B.L. Rob. & Fernald -- not accepted
  Wyethia ovata Torr. & A. Gray ex Torr. -- not accepted -- southern mule-ears
  Xanthisma texanum ssp. drummondii (Torr. & A. Gray) Semple -- not accepted -- Drummond's sleepydaisy
  Xanthisma texanum var. drummondii (Torr. & A. Gray) A. Gray -- accepted -- Drummond's sleepydaisy
  Xanthium strumarium var. canadense (Mill.) Torr. & A. Gray -- not accepted -- Canada cocklebur, Canada cockleburr, cocklebur, common cocklebur, rough cocklebur, rough cockleburr
  Xylorhiza tortifolia (Torr. & A. Gray) Greene -- accepted -- Mojave aster, Mojave woodyaster
  Xylorhiza tortifolia var. tortifolia (Torr. & A. Gray) Greene -- accepted -- Mojave aster, Mojave woodyaster
  Zeltnera beyrichii (Torr. & A. Gray) G. Mans. -- accepted -- mountain pink, quinineweed, rock centaury
  Ziziphus obtusifolia (Hook. ex Torr. & A. Gray) A. Gray -- accepted -- graythorn, Lote bush, lotebush
  Ziziphus obtusifolia var. obtusifolia (Hook. ex Torr. & A. Gray) A. Gray -- accepted -- graythorn, lotebush
   

A gray bar