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Results of: Search in every Kingdom for Scientific Name containing 'Phorbia'
 
 Kingdom Animalia
  Andrena euphorbiacea Scheuchl, 2005 – valid
  Anthophorula euphorbiae (Timberlake, 1947) – valid
  Argia euphorbia Fraser, 1946 – valid
  Atholus euphorbiae Yélamos, 1993 – invalid
  Atholus euphorbiae (Peyerimhoff, 1925) – valid
  Boreophorbia – valid
  Boreophorbia hirtipes (Stein, 1907) – valid
  Calliopsis euphorbiae (Cockerell, 1925) – invalid
  Cerceris euphorbiae Marquet, 1875 – invalid
  Dryophytes euphorbiaceus (Günther, 1858) – valid
  Exomalopsis euphorbiae Timberlake, 1947 – invalid
  Heterosarus euphorbiae Timberlake, 1975 – invalid
  Hyla euphorbiacea Günther, 1858 – invalid – Rana-de árbol de Los Altos-del Sur
  Hyla euphorbiacea biseriata Smith, Langebartel and Williams, 1964 – invalid
  Hyles euphorbiae (Linnaeus, 1758) – valid
  Kirkaldiella euphorbiae Osborn, 1935 – valid
  Macrophorbia houghi Malloch, 1920 – invalid
  Macrosiphum euphorbiae (Thomas, 1878) – valid – potato aphid, puceron de la pomme de terre
  Nomadopsis euphorbiae (Cockerell, 1925) – invalid
  Nysson euphorbiae R. Bohart, 1968 – valid
  Oceanides euphorbiae Ashlock, 1966 – valid
  Oliarus euphorbiae Gifford, 1925 – valid
  Oreopasites euphorbiae Cockerell, 1929 – valid
  Pachycraerus euphorbiae Lewis, 1898 – valid
  Parapalystes euphorbiae Croeser, 1996 – valid
  Perdita euphorbiae Timberlake, 1954 – valid
  Phorbia – valid
  Phorbia barbicula (Huckett, 1948) – valid
  Phorbia biciliata Coquillett, 1900 – invalid
  Phorbia brevitarsata Malloch, 1919 – invalid
  Phorbia cepetorum Meade, 1883 – invalid
  Phorbia curvicauda (Zetterstedt, 1845) – valid
  Phorbia exigua Meade, 1883 – invalid
  Phorbia fascicularis Tiensuu, 1935 – valid
  Phorbia fuscisquama Wulp, 1896 – invalid
  Phorbia genitalis (Schnabl, 1911) – valid
  Phorbia impula (Huckett, 1948) – valid
  Phorbia lobata (Huckett, 1929) – valid
  Phorbia lupini Coquillett, 1901 – invalid
  Phorbia masculans (Huckett, 1948) – valid
  Phorbia morosa Wulp, 1876 – invalid
  Phorbia nitidula (Coquillett, 1903) – valid
  Phorbia penicillaris (Stein, 1916) – valid
  Phorbia perssoni Hennig, 1976 – invalid
  Phorbia portensis (Huckett, 1948) – valid
  Phorbia prisca Wulp, 1896 – invalid
  Phorbia rubivora Coquillett, 1897 – invalid
  Phorbia securis Tiensuu, 1935 – valid
  Phorbia sinuata (Malloch, 1924) – valid
  Phorbia sombrosa (Huckett, 1966) – valid
  Plagithmysus euphorbiae (Bridwell, 1920) – valid
  Platysoma euphorbiae Peyerimhoff, 1925 – invalid
  Protandrena euphorbiae (Timberlake, 1955) – valid
  Proterhinus euphorbiae Perkins, 1920 – valid
  Psaenythia euphorbiae Timberlake, 1955 – invalid
  Pseudopanurgus euphorbiae (Timberlake, 1975) – valid
  Spinoliella euphorbiae Cockerell, 1925 – invalid
  Xyletobius euphorbiae Perkins, 1910 – valid
 
 Kingdom Plantae
  Elaeophorbia Stapf – not accepted
  Elaeophorbia acuta N.E. Br. – not accepted
  Elaeophorbia beillei (A. Chev.) Jacobsen – not accepted
  Elaeophorbia drupifera (Thonn.) Stapf – not accepted
  Elaeophorbia grandifolia (Haw.) Croizat – not accepted
  Elaeophorbia hiernii Croizat – not accepted
  Elaeophorbia leonensis (N.E. Br.) Jacobsen – not accepted
  Elaeophorbia neriifolia (L.) A. Chev. – not accepted
  Elaeophorbia teke (Schweinf. ex Pax) A. Chev. – not accepted
  Euphorbia L. – accepted – spurge
  Euphorbia aaron-rossii A.H. Holmgren & N.H. Holmgren – accepted – Marble Canyon spurge, Ross spurge
  Euphorbia abbottii Baker – accepted
  Euphorbia abbreviata Correll – not accepted
  Euphorbia abchazica Woronow – not accepted
  Euphorbia abdelkuri Balf. f. – accepted – Firhadh
  Euphorbia abdita (D.G. Burch) Radcl.-Sm. – accepted
  Euphorbia abdulghafooriana Abedin – accepted
  Euphorbia abolinii Korovin ex Pavlov – not accepted
  Euphorbia abortiva Porta – not accepted
  Euphorbia abramsiana L.C. Wheeler – accepted – Abrams' sandmat
  Euphorbia abscondita Mayfield – accepted
  Euphorbia abyssinica J.F. Gmel. – accepted
  Euphorbia abyssinica var. erythraeae Berger – not accepted
  Euphorbia abyssinica var. mozambicensis Boiss. – not accepted
  Euphorbia abyssinica var. tetragona Schweinf. – not accepted
  Euphorbia acalyphoides Hochst. ex Boiss. – accepted
  Euphorbia acalyphoides ssp. acalyphoides Hochst. ex Boiss. – accepted
  Euphorbia acalyphoides ssp. cicatricosa S. Carter – accepted
  Euphorbia acalyphoides var. arabica Boiss. – not accepted
  Euphorbia acanthodes Akhani – accepted
  Euphorbia acanthothamnos Heldr. & Sart. ex Boiss. – accepted
  Euphorbia acaulis Roxb. – not accepted
  Euphorbia acerensis Boiss. – accepted
  Euphorbia acervata S. Carter – accepted
  Euphorbia achanocarpa Guss. ex Spreng. – not accepted
  Euphorbia acrurensis N.E. Br. – not accepted
  Euphorbia actinoclada S. Carter – accepted
  Euphorbia aculeata E. Mey. – not accepted
  Euphorbia acuminata Lam. – not accepted
  Euphorbia acuta Engelm. – accepted – Pointed sandmat
  Euphorbia acuta var. stenophylla Boiss. – not accepted
  Euphorbia acutifolia (Boiss.) Rech. f. – not accepted
  Euphorbia adenensis Deflers – not accepted
  Euphorbia adenochila S. Carter – accepted
  Euphorbia adenochlora C. Morren & Decne. – accepted
  Euphorbia adenopoda Baill. – accepted
  Euphorbia adenoptera Bertol. – accepted – southern Florida sandmat
  Euphorbia adenoptera ssp. adenoptera Bertol. – accepted
  Euphorbia adenoptera ssp. canescens (Proctor) Oudejans – accepted
  Euphorbia adenoptera ssp. gundlachii (Urb.) Oudejans – accepted
  Euphorbia adenoptera ssp. pergamena (Small) Oudejans – not accepted – southern Florida sandmat
  Euphorbia adenoptera var. indivisa (Engelm.) Boiss. – not accepted
  Euphorbia adhaerens (Small) Jabl. – not accepted
  Euphorbia adiantoides Lam. – accepted
  Euphorbia adinophylla Donn. Sm. – not accepted
  Euphorbia adjurana P.R.O. Bally & S. Carter – accepted
  Euphorbia adriana A. St.-Hil. ex Klotzsch & Garcke – not accepted
  Euphorbia aegyptiaca Boiss. – not accepted
  Euphorbia aegyptiaca var. indica Boiss. – not accepted
  Euphorbia aellenii Rech. f. – not accepted
  Euphorbia aequoris N.E. Br. – accepted
  Euphorbia aeruginosa Schweick. – accepted
  Euphorbia aethiopum Croizat – not accepted
  Euphorbia affinis DC. – not accepted
  Euphorbia affinis (Klotzsch & Garcke) Boiss. – not accepted
  Euphorbia afzelii N.E. Br. – not accepted
  Euphorbia agatheae Haevermans – accepted
  Euphorbia aggregata A. Berger – accepted
  Euphorbia aggregata var. alternicolor (N.E. Br.) A.C. White, R.A. Dyer & B. Sloane – not accepted
  Euphorbia agowensis Hochst. ex Boiss. – accepted
  Euphorbia agowensis var. agowensis Hochst. ex Boiss. – accepted
  Euphorbia agowensis var. pseudoholstii (Pax) P.R.O. Bally & S. Carter – accepted
  Euphorbia agraria M. Bieb. – accepted – urban spurge
  Euphorbia agraria var. csatoi Simonk. – not accepted
  Euphorbia agraria var. subhastata (Vis. & Pancic) Gris – not accepted
  Euphorbia agraria var. thyrsiflora (Griseb.) Nyman – not accepted
  Euphorbia agrorum Willd. ex Ledeb. – not accepted
  Euphorbia akdaghensis Stapf – not accepted
  Euphorbia akenocarpa Guss. – accepted
  Euphorbia akenocarpa Roux & Blaise ex Boiss. – not accepted
  Euphorbia akmanii I. Genç & Kültür – accepted
  Euphorbia alaica (Prokh.) Prokh. – accepted
  Euphorbia alainii Oudejans – accepted
  Euphorbia alata Hook. – accepted
  Euphorbia alatavica Boiss. – accepted
  Euphorbia alatavica f. kaschgarica (Regel) Baikov – not accepted
  Euphorbia alatocaulis V.W. Steinm. & Felger – accepted
  Euphorbia albanica N.E. Br. – accepted
  Euphorbia albicaulis Rydb. – not accepted
  Euphorbia albiflora Taub. – not accepted
  Euphorbia albipollinifera L.C. Leach – accepted
  Euphorbia albomarginata Torr. & A. Gray – accepted – whitemargin sandmat, Rattlesnake weed, white-margin sandmat, white-margin sandwort
  Euphorbia albovillosa Pax – not accepted
  Euphorbia alcicornis Baker – accepted
  Euphorbia alcicornis Poiss. – not accepted
  Euphorbia aleppica L. – accepted
  Euphorbia alexandrina Delile – not accepted
  Euphorbia alfredii Rauh – accepted
  Euphorbia algeriensis Boiss. – not accepted
  Euphorbia aliceae A. Nelson – not accepted
  Euphorbia allocarpa S. Carter – accepted
  Euphorbia alluaudii Drake – accepted
  Euphorbia alluaudii ssp. alluaudii Drake – accepted
  Euphorbia alluaudii ssp. oncoclada (Drake) F. Friedmann & Cremers – accepted
  Euphorbia alpigena A. Kern. – not accepted
  Euphorbia alpina Ledeb. – accepted
  Euphorbia alpina var. baikalensis Boiss. – not accepted
  Euphorbia alpina var. rupicola Baikov – not accepted
  Euphorbia alsiniflora Baill. – accepted
  Euphorbia alsinifolia Boiss. – accepted
  Euphorbia alsinoides Miq. – accepted
  Euphorbia alta Norton – accepted – giant spurge
  Euphorbia altaica Ledeb. – accepted
  Euphorbia altaica var. pilosa Stschegl. – not accepted
  Euphorbia altaica var. sajanensis Boiss. – not accepted
  Euphorbia alternicolor N.E. Br. – not accepted
  Euphorbia altissima Boiss. – accepted
  Euphorbia altissima var. altissima Boiss. – accepted
  Euphorbia altissima var. glabrescens Boiss. ex M.S. Khan – accepted
  Euphorbia altissima var. nuda Velen. – not accepted
  Euphorbia altotibetica Paulsen – accepted
  Euphorbia amandi Oudejans – accepted
  Euphorbia amarifontana N.E. Br. – accepted
  Euphorbia ambacensis N.E. Br. – accepted
  Euphorbia ambarivatoensis Rauh & Bard.-Vauc. – accepted
  Euphorbia ambatofinandranae Leandri – not accepted
  Euphorbia ambigua Waldst. & Kit. ex Willd. – not accepted
  Euphorbia ambovombensis Rauh & Razaf. – accepted
  Euphorbia ambroseae L.C. Leach – accepted
  Euphorbia ambroseae var. ambroseae L.C. Leach – accepted
  Euphorbia ambroseae var. spinosa L.C. Leach – accepted
  Euphorbia ambukensis Stepanov – not accepted
  Euphorbia amicorum S. Carter – accepted
  Euphorbia ammak Schweinf. – accepted
  Euphorbia ammannioides Kunth – not accepted
  Euphorbia ammatotricha Boiss. – not accepted
  Euphorbia ammophila S. Carter & Dioli – accepted
  Euphorbia amoena Klotzsch – not accepted
  Euphorbia amphimalaca Standl. – not accepted
  Euphorbia ampla Hook. f. – not accepted
  Euphorbia ampla var. tenuior Hook. f. – not accepted
  Euphorbia amplexicaulis Hook. f. – accepted
  Euphorbia amplexicaulis Ledeb. – not accepted
  Euphorbia amplophylla Pax – accepted
  Euphorbia amygdaloides L. – accepted
  Euphorbia amygdaloides Lam. – not accepted
  Euphorbia amygdaloides f. biennis (Maire) Oudejans – not accepted
  Euphorbia amygdaloides f. ligulata (Chaub.) O. Bolňs & Vigo – not accepted
  Euphorbia amygdaloides f. minor (Gaudin) Oudejans – not accepted
  Euphorbia amygdaloides f. purpurata (Coss. & Germ.) Oudejans – not accepted
  Euphorbia amygdaloides ssp. amygdaloides L. – accepted
  Euphorbia amygdaloides ssp. arbuscula Meusel – accepted
  Euphorbia amygdaloides ssp. chaixiana (Timb.-Lagr.) Nyman – not accepted
  Euphorbia amygdaloides ssp. heldreichii (Orph. ex Boiss.) Aldén – not accepted
  Euphorbia amygdaloides ssp. robbiae (Turrill) Stace – accepted
  Euphorbia amygdaloides ssp. semiperfoliata (Viv.) Radcl.-Sm. – not accepted
  Euphorbia amygdaloides var. biennis Maire – not accepted
  Euphorbia amygdaloides var. chaixiana (Timb.-Lagr.) Boiss. – not accepted
  Euphorbia amygdaloides var. ligulata (Chaub.) Boiss. – not accepted
  Euphorbia amygdaloides var. oblongifolia K. Koch – not accepted
  Euphorbia amygdaloides var. robbiae (Turrill) Radcl.-Sm. – not accepted
  Euphorbia anacampseroides Lam. – not accepted
  Euphorbia anacampseros Boiss. – accepted
  Euphorbia anacampseros Balansa ex Boiss. – not accepted
  Euphorbia anacampseros var. anacampseros Boiss. – accepted
  Euphorbia anacampseros var. minor Boiss. – not accepted
  Euphorbia anacampseros var. tmolae M.S. Khan – accepted
  Euphorbia anacantha Aiton – not accepted
  Euphorbia anachoreta Svent. – accepted
  Euphorbia anagalloides Baker – not accepted
  Euphorbia analalavensis Leandri – accepted
  Euphorbia analamerae Leandri – accepted
  Euphorbia analavelonensis Rauh & Mangelsdorff – accepted
  Euphorbia anceps Benth. – not accepted
  Euphorbia ancyrensis Azn. ex M.S. Khan – not accepted
  Euphorbia anderssonii Millsp. – not accepted
  Euphorbia andina Phil. – not accepted
  Euphorbia andongensis Hiern – not accepted
  Euphorbia andrachnoides Schrenk – accepted
  Euphorbia andromedae Millsp. – not accepted
  Euphorbia androsaemifolia Willd. ex Schlecht. – accepted
  Euphorbia androsaemifolia (Haw.) Steud. – not accepted
  Euphorbia androsaemifolia J. Presl & C. Presl – not accepted
  Euphorbia androsaemifolia ssp. salicetorum (Jord.) Nyman – not accepted
  Euphorbia androsaemoides Dennst. – not accepted
  Euphorbia angolensis Pax – not accepted
  Euphorbia angrae N.E. Br. – accepted
  Euphorbia angularis Klotzsch – accepted
  Euphorbia angulata Jacq. – accepted
  Euphorbia angulata f. nemoralis Oudejans – not accepted
  Euphorbia angulata ssp. deseglisei (Boreau ex Boiss.) Nyman – not accepted
  Euphorbia angulata var. expansa (Janka) Boiss. – not accepted
  Euphorbia angusta Engelm. – accepted – Blackfoot sandmat, narrow-leaf spurge
  Euphorbia angustiflora Pax – accepted
  Euphorbia angustifolia (Haw.) Steud. – not accepted
  Euphorbia angustifolia Lockh. ex G. Don – not accepted
  Euphorbia angustifolia Buch.-Ham. ex D. Don – not accepted
  Euphorbia angustifolia Parodi – not accepted
  Euphorbia anisopetala (Prokh.) Prokh. – accepted
  Euphorbia ankaranae Leandri – accepted
  Euphorbia ankarensis Boiteau – accepted
  Euphorbia ankazobensis Rauh & Hofstätter – accepted
  Euphorbia annamarieae Rauh – accepted
  Euphorbia annulata Nutt. ex Sherff – not accepted
  Euphorbia anomala Salzm. ex Boiss. – not accepted
  Euphorbia anomala Pax – not accepted
  Euphorbia antankara Leandri – not accepted
  Euphorbia anthonyi Brandegee – accepted
  Euphorbia anthonyi var. clarionensis (Brandegee) I.M. Johnst. – not accepted
  Euphorbia anthula Lavrent. & Papan. – accepted
  Euphorbia antilibanotica Mouterde – accepted
  Euphorbia antiquorum L. – accepted
  Euphorbia antiquorum var. polygona Boiss. – not accepted
  Euphorbia antisyphilitica Zucc. – accepted – candelilla
  Euphorbia antisyphilitica var. luxurians Miranda – not accepted
  Euphorbia antisyphilitica var. typica Miranda – not accepted
  Euphorbia antisyphylitica Zucc. – not accepted
  Euphorbia antonii Oudejans – accepted
  Euphorbia antso Denis – accepted – Antso
  Euphorbia anychioides Boiss. – accepted
  Euphorbia apatzingana McVaugh – accepted
  Euphorbia aphylla Brouss. ex Willd. – accepted
  Euphorbia apicata L.C. Wheeler – accepted
  Euphorbia apiculata Andersson – not accepted
  Euphorbia apios L. – accepted
  Euphorbia apios var. lamprocarpa Boiss. – not accepted
  Euphorbia apocynifolia Small – not accepted
  Euphorbia apocynoides Klotzsch – not accepted
  Euphorbia appariciana Rizzini – accepted
  Euphorbia appendiculata P.R.O. Bally & S. Carter – accepted
  Euphorbia applanata Thulin & Al-Gifri – accepted
  Euphorbia aprica Baill. – accepted
  Euphorbia apurimacensis Croizat – accepted
  Euphorbia arabica Hochst. & Steud. ex Anderson – accepted
  Euphorbia arabica var. brevifolia Boiss. – not accepted
  Euphorbia arabica var. latippendiculata Pax – not accepted
  Euphorbia arabicoides N.E. Br. – accepted
  Euphorbia aragonensis Loscos & Pardo – not accepted
  Euphorbia aragonensis ssp. bolosii (Molero & Rovira) Rivas Mart. – not accepted
  Euphorbia aragonensis var. lanceolatifolia Loscos & Pardo ex Lange – not accepted
  Euphorbia arahaka Poiss. – accepted – Arahaka, Arahaky
  Euphorbia ararica Jord. – not accepted
  Euphorbia araucana Phil. – accepted
  Euphorbia arborescens Roxb. – not accepted
  Euphorbia arborescens E. Mey. – not accepted
  Euphorbia arborescens C. Sm. – not accepted
  Euphorbia arborescens Boiss. – not accepted
  Euphorbia arborescens Salm-Dyck – not accepted
  Euphorbia arbuscula Balf. f. – accepted
  Euphorbia ardonensis Galushko – accepted
  Euphorbia arenaria Kunth – accepted
  Euphorbia arenaria Engelm. & A. Gray – not accepted
  Euphorbia arenaria Nutt. – not accepted
  Euphorbia arenaria Willd. ex Ledeb. – not accepted
  Euphorbia arenaria var. quitensis Boiss. – not accepted
  Euphorbia arenarioides Gagnep. – accepted
  Euphorbia arenicola Parish – not accepted
  Euphorbia argillosa Chodat & Hassl. – accepted
  Euphorbia arguta Banks & Sol. – accepted
  Euphorbia arguta var. dasycarpa Plitmann – not accepted
  Euphorbia arida N.E. Br. – accepted
  Euphorbia ariensis Kunth – accepted
  Euphorbia ariensis var. villicaulis Fernald – not accepted
  Euphorbia arillata Edgew. – not accepted
  Euphorbia aristata Schmalh. – accepted
  Euphorbia arizonica Engelm. – accepted – Arizona sandmat
  Euphorbia arkansana Engelm. & A. Gray – not accepted
  Euphorbia arkansana var. atrosemina Norton – not accepted
  Euphorbia arkansana var. coloradensis Norton – not accepted
  Euphorbia arkansana var. missouriensis Norton – not accepted
  Euphorbia armata Thunb. – not accepted
  Euphorbia armena Boiss. – not accepted
  Euphorbia armeniaca Boiss. – not accepted
  Euphorbia armourii Millsp. – accepted
  Euphorbia armstrongiana Boiss. – accepted
  Euphorbia arnottiana Endl. – accepted – `akoko
  Euphorbia arnottiana var. integrifolia (Hillebr.) H. St. John – not accepted
  Euphorbia arrecta N.E. Br. – accepted
  Euphorbia arsenariensis (Batt.) Batt. & Trab. – not accepted
  Euphorbia artaudiana DC. – not accepted
  Euphorbia arteagae W.R. Buck & Huft – accepted
  Euphorbia articulata Burm. – not accepted – jointed sandmat
  Euphorbia articulata Burm. in C. Plumier – not accepted
  Euphorbia articulata Dennst. – not accepted
  Euphorbia articulata Andersson – not accepted
  Euphorbia articulata var. bindloensis A. Stewart – not accepted
  Euphorbia articulata var. lordatii Stehlé & Stehlé – not accepted
  Euphorbia artifolia N.E. Br. – accepted
  Euphorbia artvinensis Bornm. & Woronow – not accepted
  Euphorbia arundelana Bartlett – not accepted
  Euphorbia arvalis Boiss. & Heldr. – accepted
  Euphorbia arvalis ssp. arvalis Boiss. & Heldr. – accepted
  Euphorbia arvalis ssp. longistyla (Litard. & Maire) Molero, Rovira & Vicens – accepted
  Euphorbia arvalis var. euarvalis Maire – not accepted
  Euphorbia arvalis var. longistyla Litard. & Maire – not accepted
  Euphorbia arvensis Kit. – not accepted
  Euphorbia arvensis Schleich. ex Steud. – not accepted
  Euphorbia ascendens Willd. ex Boiss. – not accepted
  Euphorbia asclepiadea Milne-Redh. – accepted
  Euphorbia aserbajdzhanica Bordz. – accepted
  Euphorbia aspera M. Bieb. – not accepted
  Euphorbia aspera var. oligadenia Boiss. – not accepted
  Euphorbia aspera var. serrata Boiss. – not accepted
  Euphorbia aspericaulis Pax – accepted
  Euphorbia asperifolia Engelm. ex Boiss. – not accepted
  Euphorbia asthenacantha S. Carter – accepted
  Euphorbia astrachanica C.A. Mey. ex Claus – accepted
  Euphorbia astrispina N.E. Br. – not accepted
  Euphorbia astroites Fisch. & C.A. Mey. – not accepted
  Euphorbia astroites var. heterappendiculata Millsp. – not accepted
  Euphorbia astyla Engelm. ex Boiss. – accepted – alkali sandmat, Pecos spurge
  Euphorbia atlantica Pers. – not accepted
  Euphorbia atlantica Coss. ex Boiss. – not accepted
  Euphorbia atlantica var. leiocarpa Boiss. – not accepted
  Euphorbia atlantica var. major Boiss. – not accepted
  Euphorbia atlantica var. villosa Faure & Maire – not accepted
  Euphorbia atlantis Maire – not accepted
  Euphorbia atlantis f. major (Boiss.) Vindt – not accepted
  Euphorbia atlantis var. leiocarpa (Boiss.) Oudejans – not accepted
  Euphorbia atlantis var. major (Boiss.) Oudejans – not accepted
  Euphorbia atlantis var. villosa (Faure & Maire) Vindt – not accepted
  Euphorbia atoto G. Forst. – accepted
  Euphorbia atoto var. imbricata Boiss. – not accepted
  Euphorbia atoto var. minor Boiss. – not accepted
  Euphorbia atrocarmesina L.C. Leach – accepted
  Euphorbia atrocarmesina ssp. arborea L.C. Leach – accepted
  Euphorbia atrocarmesina ssp. atrocarmesina L.C. Leach – accepted
  Euphorbia atrococca A. Heller – accepted – koko
  Euphorbia atrococca var. kilaueana Sherff – not accepted
  Euphorbia atrococca var. kokeeana Sherff – not accepted
  Euphorbia atrococca var. typica Sherff – not accepted
  Euphorbia atroflora S. Carter – accepted
  Euphorbia atropurpurea Brouss. ex Willd. – accepted
  Euphorbia atropurpurea f. atropurpurea Brouss. ex Willd. – accepted
  Euphorbia atropurpurea f. lutea A. Santos – accepted
  Euphorbia atropurpurea var. modesta Svent. – not accepted
  Euphorbia atrorubens Engelm. ex Boiss. – not accepted
  Euphorbia atrosanguinea Poepp. ex Klotzsch – not accepted
  Euphorbia atrox F.K. Horw. ex S. Carter – accepted
  Euphorbia attastoma Rizzini – accepted
  Euphorbia attastoma var. xanthochlora Rizzini – not accepted
  Euphorbia aubryana Baill. – not accepted
  Euphorbia aucheri Boiss. – accepted
  Euphorbia audissoui Marx – accepted
  Euphorbia aulacosperma Boiss. – accepted
  Euphorbia aulacosperma var. fossulata (Boiss. & Gaill.) Boiss. – not accepted
  Euphorbia aureocincta Croizat – not accepted
  Euphorbia aureoviridiflora (Rauh) Rauh – accepted
  Euphorbia auricularia Boiss. – not accepted
  Euphorbia australis Boiss. – accepted
  Euphorbia australis var. canescens Domin – not accepted
  Euphorbia australis var. erythrantha (F. Muell.) Benth. – not accepted
  Euphorbia australis var. glabrescens Boiss. – not accepted
  Euphorbia australis var. glaucescens Boiss. – not accepted
  Euphorbia australis var. potentillina Baill. – not accepted
  Euphorbia australis var. semiglabra Domin – not accepted
  Euphorbia australis var. subtomentosa Domin – not accepted
  Euphorbia australis var. typica Domin – not accepted
  Euphorbia austriaca A. Kern. – accepted
  Euphorbia austriaca ssp. sojakii Chrtek & Krísa – not accepted
  Euphorbia austrina (Small) Jabl. – not accepted
  Euphorbia austro-occidentalis Thell. – accepted
  Euphorbia austroanatolica Hub.-Mor. & M.S. Khan – accepted
  Euphorbia austrotexana Mayfield – accepted
  Euphorbia austrotexana var. austrotexana Mayfield – accepted
  Euphorbia austrotexana var. carrii Mayfield – accepted
  Euphorbia avasmontana Dinter – accepted
  Euphorbia avenia Thibaut ex Pers. – not accepted
  Euphorbia awashensis M.G. Gilbert – accepted
  Euphorbia azorica Hochst. – accepted – Erva-leitera
  Euphorbia azorica Welw. ex Boiss. – not accepted
  Euphorbia babensis Kit. – not accepted
  Euphorbia bachmannii Pax – not accepted
  Euphorbia backeri Pax & K. Hoffm. – not accepted
  Euphorbia baetica Boiss. – accepted
  Euphorbia baga A. Chev. – accepted
  Euphorbia baga var. baga A. Chev. – accepted
  Euphorbia baga var. parvifolia L.E. Newton – accepted
  Euphorbia bahiensis (Klotzsch & Garcke) Boiss. – accepted
  Euphorbia baillonii Boiss. ex Baill. – not accepted
  Euphorbia baioensis S. Carter – accepted
  Euphorbia bakeriana Baill. – not accepted
  Euphorbia balakrishnanii Binojk. & Gopalan – accepted
  Euphorbia balearica Poir. ex Klotzsch & Garcke – not accepted
  Euphorbia baleensis M.G. Gilbert – accepted
  Euphorbia balkhanica Tarassov – not accepted
  Euphorbia ballyana Rauh – accepted
  Euphorbia ballyi S. Carter – accepted
  Euphorbia balsamea Welw. ex Hiern – not accepted
  Euphorbia balsamifera Aiton – accepted
  Euphorbia balsamifera ssp. adenensis (Deflers) P.R.O. Bally – accepted
  Euphorbia balsamifera ssp. balsamifera Aiton – accepted
  Euphorbia balsamifera ssp. sepium (N.E. Br.) Maire – not accepted
  Euphorbia banae Rauh – accepted
  Euphorbia bancana Miq. – not accepted
  Euphorbia baradii S. Carter – accepted
  Euphorbia barbellata Engelm. – not accepted
  Euphorbia barbellata Hurus. – not accepted
  Euphorbia barbellata f. denudata (Hurus.) Kitag. – not accepted
  Euphorbia barbellata var. imaii (Hurus.) Kitag. – not accepted
  Euphorbia barbicarina (Millsp.) Standl. – not accepted
  Euphorbia barbicollis P.R.O. Bally – accepted
  Euphorbia bariensis S. Carter – accepted
  Euphorbia barkeri Urb. & Ekman – not accepted
  Euphorbia barnardii A.C. White, R.A. Dyer & B. Sloane – accepted
  Euphorbia barnesii (Millsp.) Oudejans – accepted
  Euphorbia barnhartii Croizat – not accepted
  Euphorbia barrelieri Savi – accepted
  Euphorbia barrelieri ssp. barrelieri Savi – accepted
  Euphorbia barrelieri ssp. carnica (Boiss.) Kuzmanov – not accepted
  Euphorbia barrelieri ssp. hercegovina (Beck) Kuzmanov – not accepted
  Euphorbia barrelieri ssp. thessala (Formánek) Bornm. – accepted
  Euphorbia barrelieri var. carnica (Boiss.) Fiori – not accepted
  Euphorbia barrelieri var. thessala (Formánek) K. Malý – not accepted
  Euphorbia barteri N.E. Br. – not accepted
  Euphorbia bartolomaei Greene – accepted
  Euphorbia basarabica Prodán – accepted
  Euphorbia basargica Prodán – accepted
  Euphorbia baselicis Ten. – not accepted
  Euphorbia baselicis ssp. thessala Formánek – not accepted
  Euphorbia baselicis var. rupestris Friraldszky ex Boiss. – not accepted
  Euphorbia basutica Marloth – not accepted
  Euphorbia batabanensis Urb. – not accepted
  Euphorbia baueri Engelm. ex Boiss. – accepted
  Euphorbia baxanica Galushko – not accepted
  Euphorbia bayeri L.C. Leach – accepted
  Euphorbia baylissii L.C. Leach – accepted
  Euphorbia beamanii M.C. Johnst. – accepted
  Euphorbia beaumieriana Hook. f. & Coss. – not accepted
  Euphorbia beckii V.W. Steinm. – accepted
  Euphorbia begoniifolia Lehm. – not accepted
  Euphorbia beharensis Leandri – accepted
  Euphorbia beharensis var. adpressifolia Rauh – accepted
  Euphorbia beharensis var. beharensis Leandri – accepted
  Euphorbia beharensis var. guillemetii (Ursch & Leandri) Rauh – accepted
  Euphorbia beharensis var. squarrosa Rauh – accepted
  Euphorbia beharensis var. truncata Rauh – accepted
  Euphorbia beillei A. Chev. – accepted
  Euphorbia bejariensis DC. – not accepted
  Euphorbia bemarahaensis Rauh & Mangelsdorff – accepted
  Euphorbia benedicta Greene – not accepted
  Euphorbia benguelensis Pax – not accepted
  Euphorbia benthamii Hiern – accepted
  Euphorbia berevoensis Lawant & Buddens. – accepted
  Euphorbia bergeriana Dinter – not accepted
  Euphorbia bermudiana Millsp. – not accepted
  Euphorbia berorohae Rauh & Hofstätter – accepted
  Euphorbia berotica N.E. Br. – accepted
  Euphorbia bertemariae Bisseret & Dioli – accepted
  Euphorbia berteriana Balb. ex Spreng. – not accepted
  Euphorbia berteroana Balb. ex Spreng. – accepted – Bertero's sandmat
  Euphorbia berthelotii Bolle ex Boiss. – accepted
  Euphorbia berythea Boiss. & Blanche – accepted
  Euphorbia besseri (Klotzsch & Garcke) Boiss. – accepted
  Euphorbia betacea Baill. – accepted
  Euphorbia betulicortex M.G. Gilbert – accepted
  Euphorbia beuginii Rebmann – accepted
  Euphorbia bevilaniensis Croizat – not accepted
  Euphorbia biaculeata Denis – accepted
  Euphorbia bialata Link – not accepted
  Euphorbia bianoensis (Malaisse & Lecron) Bruyns – accepted
  Euphorbia bicapitata Brandegee – not accepted
  Euphorbia bicephala Bertol. – not accepted
  Euphorbia bicolor Engelm. & A. Gray – accepted – snow on the prairie, snow-on-the-prairie
  Euphorbia bicolor var. concolor Engelm. & A. Gray – not accepted
  Euphorbia bicompacta Bruyns – accepted
  Euphorbia bicompacta var. bicompacta Bruyns – accepted
  Euphorbia bicompacta var. rubra (S. Carter) Bruyns – accepted
  Euphorbia biconvexa Domin – accepted
  Euphorbia bifida auct. non Hook. & Arn. – not accepted
  Euphorbia bifida Hook. & Arn. – accepted
  Euphorbia bifida Thwaites – not accepted
  Euphorbia biformis S. Watson – not accepted
  Euphorbia bifurcata Engelm. – accepted – forked spurge
  Euphorbia biglandulosa Desf. – not accepted
  Euphorbia biglandulosa Boiss. – not accepted
  Euphorbia biglandulosa Willd. – not accepted
  Euphorbia biglandulosa var. mauretanica Maire – not accepted
  Euphorbia biharamulensis S. Carter – accepted
  Euphorbia bilobata Engelm. – accepted – blackseed spurge, black-seed spurge
  Euphorbia bilocularis N.E. Br. – not accepted
  Euphorbia bimensis Miq. – not accepted
  Euphorbia bindloensis (A. Stewart) Ya Yang – accepted
  Euphorbia biramensis Urb. – not accepted
  Euphorbia biselegans Bruyns – accepted
  Euphorbia bisellenbeckii Bruyns – accepted
  Euphorbia biserrata Millsp. – not accepted
  Euphorbia bisglobosa Bruyns – accepted
  Euphorbia bisulcata J.T. Howell – not accepted
  Euphorbia bitataensis M.G. Gilbert – accepted
  Euphorbia biumbellata Poir. – accepted
  Euphorbia biumbellata Boiss. – not accepted
  Euphorbia biuncialis McVaugh – not accepted
  Euphorbia bivonae Steud. – accepted
  Euphorbia bivonae ssp. bivonae Steud. – accepted
  Euphorbia bivonae ssp. tunetana Murb. – accepted
  Euphorbia bivonae var. mauritii Sennen – not accepted
  Euphorbia bivonae var. melitensis (Parl.) Fiori – not accepted
  Euphorbia bivonae var. montana Lojac. – not accepted
  Euphorbia bivonae var. papillaris Boiss. – not accepted
  Euphorbia bivonae var. tangerina Pau – not accepted
  Euphorbia blanchetii Miq. ex Boiss. – not accepted
  Euphorbia blatteri Oudejans – accepted
  Euphorbia blepharophylla Ledeb. – accepted
  Euphorbia blepharostipula Millsp. ex Rose – not accepted
  Euphorbia blodgettii Engelm. ex Hitchc. – accepted – limestone sandmat
  Euphorbia bodenghieniae (Malaisse & Lecron) Bruyns – accepted
  Euphorbia bodinieri H. Lév. & Vaniot – not accepted
  Euphorbia boerhaavioides Rusby – accepted
  Euphorbia boerhaviifolia (Klotzsch & Garcke) Boiss. – not accepted
  Euphorbia boinensis Denis ex Humbert & Leandri – accepted
  Euphorbia boissieri Baill. – accepted
  Euphorbia boissieriana (Woronow) Prokh. – not accepted
  Euphorbia boiteaui Leandri – accepted
  Euphorbia boiteaui var. ampanihyensis (Cremers) J.-P. Castillon & J.-B. Castillon – accepted
  Euphorbia boiteaui var. boiteaui Leandri – accepted
  Euphorbia boiteaui var. supraterra (Rauh & Buchloh) J.-P. Castillon & J.-B. Castillon – accepted
  Euphorbia boivinii Boiss. – accepted
  Euphorbia boivinii var. boivinii Boiss. – accepted
  Euphorbia boivinii var. minor Leandri – accepted
  Euphorbia boivinii var. oreades Leandri – accepted
  Euphorbia bokorensis H. Toyama & Tagane – accepted
  Euphorbia boliviana Rusby – not accepted
  Euphorbia bolosii (Molero & Rovira) Molero & Rovira – not accepted
  Euphorbia bolusii N.E. Br. – not accepted
  Euphorbia bombaiensis Santapau – not accepted
  Euphorbia bombensis Jacq. – accepted – Dixie sandmat
  Euphorbia bonae Mutel – not accepted
  Euphorbia bongensis Kotschy & Peyr. ex Boiss. – accepted
  Euphorbia bongolavensis Rauh – accepted
  Euphorbia bonifaciensis Req. ex Gren. & Godr. – not accepted
  Euphorbia bonplandii Sweet – not accepted
  Euphorbia boophthona C.A. Gardner – accepted
  Euphorbia borbonica Boiss. – accepted
  Euphorbia borealis Baikov – accepted
  Euphorbia borenensis M.G. Gilbert – accepted
  Euphorbia borodinii Sambuk – accepted
  Euphorbia borszczowii Prokh. – not accepted
  Euphorbia bosseri Leandri – accepted
  Euphorbia bothriosperma Boiss. & Kotschy – not accepted
  Euphorbia botryoides Noronha – not accepted
  Euphorbia bottae Boiss. – not accepted
  Euphorbia bougheyi L.C. Leach – accepted
  Euphorbia bouleyi S. Moore – not accepted
  Euphorbia bounophila Boiss. – not accepted
  Euphorbia bounophila var. aucheri (Boiss.) Boiss. – not accepted
  Euphorbia bourgaeana J. Gay ex Boiss. – accepted
  Euphorbia bracei Millsp. – not accepted
  Euphorbia brachiata (E. Mey. ex Klotzsch & Garcke) Boiss. – accepted
  Euphorbia brachiata Jan – not accepted
  Euphorbia brachycera Engelm. – accepted – horned spurge, shorthorn spurge
  Euphorbia brachycera f. dichotoma (Daniels) Oudejans – not accepted
  Euphorbia brachycera var. greggii (Engelm. ex Boiss.) M.C. Johnst. – not accepted
  Euphorbia brachycera var. robusta (Engelm.) Dorn – not accepted
  Euphorbia brachyphylla Denis – accepted
  Euphorbia bracteata Jacq. – accepted
  Euphorbia bracteolaris Boiss. – accepted
  Euphorbia brakdamensis N.E. Br. – accepted
  Euphorbia brandegeei Millsp. – accepted
  Euphorbia brasiliensis Lam. – not accepted
  Euphorbia brasiliensis f. angustior Chodat & Hassl. – not accepted
  Euphorbia brasiliensis f. latior Chodat & Hassl. – not accepted
  Euphorbia brasiliensis f. major Chodat & Hassl. – not accepted
  Euphorbia brasiliensis f. pruinosa Chodat – not accepted
  Euphorbia brasiliensis f. subsessilis Chodat & Hassl. – not accepted
  Euphorbia brasiliensis var. blanchetii (Miq. ex Boiss.) Boiss. – not accepted
  Euphorbia brasiliensis var. genuina Chodat & Hassl. – not accepted
  Euphorbia brasiliensis var. hyssopifolia (L.) Boiss. – not accepted
  Euphorbia brasiliensis var. lorentzii (Müll. Arg.) Griseb. – not accepted
  Euphorbia brasiliensis var. paraguayensis Chodat – not accepted
  Euphorbia brasiliensis var. pruinosa (Chodat) Chodat & Hassl. – not accepted
  Euphorbia brasiliensis var. pulchella (Kunth) Boiss. – not accepted
  Euphorbia brasiliensis var. uniflora Chodat & Hassl. – not accepted
  Euphorbia brassii P.I. Forst. – accepted
  Euphorbia braunsii N.E. Br. – accepted
  Euphorbia bravoana Svent. – accepted
  Euphorbia breonii Nois. – not accepted
  Euphorbia breviarticulata Pax – accepted
  Euphorbia breviarticulata var. breviarticulata Pax – accepted
  Euphorbia breviarticulata var. trunciformis S. Carter – accepted
  Euphorbia brevicornu Pax – accepted
  Euphorbia brevirama N.E. Br. – accepted
  Euphorbia brevirama var. astrophora (Marx) Marx & van Veldh. – accepted
  Euphorbia brevirama var. brevirama N.E. Br. – accepted
  Euphorbia brevirama var. supraterra Marx & van Veldh. – accepted
  Euphorbia brevis N.E. Br. – accepted
  Euphorbia brevitorta P.R.O. Bally – accepted
  Euphorbia bridgesii (Klotzsch & Garcke) Bertol. ex Boiss. – not accepted
  Euphorbia briquetii Emb. & Maire – accepted
  Euphorbia brittingeri Opiz ex Samp. – not accepted
  Euphorbia brittingeri ssp. flavicoma (DC.) Ladero – not accepted
  Euphorbia brittonii Millsp. – not accepted
  Euphorbia brochonii Deysson – not accepted
  Euphorbia broteroi Daveau – not accepted
  Euphorbia broussonetii Willd. ex Link – not accepted
  Euphorbia brunellii Chiov. – accepted
  Euphorbia bruntii (Proctor) Oudejans – accepted
  Euphorbia bruynsii L.C. Leach – accepted
  Euphorbia bryophylla Donn. Sm. – not accepted
  Euphorbia bubalina Boiss. – accepted
  Euphorbia buchananii Pax – not accepted
  Euphorbia buchtormensis Ledeb. – accepted
  Euphorbia buhsei Boiss. – accepted
  Euphorbia buhsei var. lasiostemon Boiss. – not accepted
  Euphorbia bulbispina Rauh & Razaf. – accepted
  Euphorbia bulleyana Diels – not accepted
  Euphorbia bungei Boiss. – accepted
  Euphorbia bupleurifolia Jacq. – accepted
  Euphorbia bupleurifolia E. Mey. – not accepted
  Euphorbia bupleuroides Desf. – accepted
  Euphorbia bupleuroides Diels – not accepted
  Euphorbia bupleuroides Willd. ex Boiss. – not accepted
  Euphorbia bupleuroides Willd. ex Ledeb. – not accepted
  Euphorbia bupleuroides ssp. luteola (Kralik) Maire – not accepted
  Euphorbia burchellii Müll. Arg. – accepted
  Euphorbia burgeri M.G. Gilbert – accepted
  Euphorbia burkhartii Bacigalupo – accepted
  Euphorbia burmanica Hook. f. – accepted
  Euphorbia burmanniana J. Gay – not accepted
  Euphorbia burmannii (Klotzsch & Garcke) E. Mey. ex Boiss. – accepted
  Euphorbia burmannii var. karroensis Boiss. – not accepted
  Euphorbia buruana Pax – accepted
  Euphorbia buschiana Grossh. – accepted
  Euphorbia bussei Pax – accepted
  Euphorbia bussei var. bussei Pax – accepted
  Euphorbia bussei var. kibwezensis (N.E. Br.) S. Carter – accepted
  Euphorbia buxifolia Lam. – not accepted
  Euphorbia buxifolia f. florida Millsp. – not accepted
  Euphorbia buxifolia f. reclinata Millsp. – not accepted
  Euphorbia buxifolia f. seminuda Millsp. – not accepted
  Euphorbia buxifolia var. flexuosa (Kunth) Boiss. – not accepted
  Euphorbia buxifolia var. ramosissima Millsp. – not accepted
  Euphorbia buxoides Radcl.-Sm. – accepted
  Euphorbia bwambensis S. Carter – accepted
  Euphorbia cactus Ehrenb. ex Boiss. – accepted
  Euphorbia cactus var. tortirama Rauh & Lavranos – not accepted
  Euphorbia cadrilateri Prodán – not accepted
  Euphorbia caducifolia Haines – accepted
  Euphorbia caecorum Mart. ex Boiss. – not accepted
  Euphorbia caeladenia Boiss. – accepted
  Euphorbia caerulescens Haw. – accepted
  Euphorbia caesaraugustana Willk. & Lange – not accepted
  Euphorbia caesia Kar. & Kir. – accepted
  Euphorbia caespitosa Lam. – accepted
  Euphorbia caespitosa Ten. – not accepted
  Euphorbia caespitosa ssp. typica Croizat – not accepted
  Euphorbia caespitosa ssp. ventanicola Croizat – not accepted
  Euphorbia caespitosa var. angustifolia Hauman – not accepted
  Euphorbia caespitosa var. ventanicola (Croizat) Subils – not accepted
  Euphorbia caiogala Ehrh. – not accepted
  Euphorbia calabarica Burkill – not accepted
  Euphorbia calabrica Huter, Porta & Rigo – not accepted
  Euphorbia calamiformis P.R.O. Bally & S. Carter – accepted
  Euphorbia calcarata (Schltdl.) V.W. Steinm. – accepted
  Euphorbia calcarea Coss. & Durieu ex Coss. – not accepted
  Euphorbia calcicola Fernald – accepted
  Euphorbia calderensis Phil. – not accepted
  Euphorbia calderoniae V.W. Steinm. – accepted
  Euphorbia calendulifolia Delile – not accepted
  Euphorbia californica Benth. – accepted
  Euphorbia californica var. californica Benth. – not accepted
  Euphorbia californica var. hindsiana (Benth.) Wiggins – not accepted
  Euphorbia calliadena Engelm. ex Boiss. – not accepted
  Euphorbia callitrichoides Kunth – not accepted
  Euphorbia callitrichoides S. Schauer – not accepted
  Euphorbia caloderma S. Carter – accepted
  Euphorbia calonesiaca Croizat – not accepted
  Euphorbia calva N.E. Br. – not accepted
  Euphorbia calyciflora Sessé & Moç. – not accepted
  Euphorbia calycina N.E. Br. – not accepted
  Euphorbia calyculata Kunth – accepted – Chupire, Tencuante
  Euphorbia calyptrata Coss. & Durieu – accepted
  Euphorbia calyptrata var. involucrata Batt. – not accepted
  Euphorbia camagueyensis (Millsp.) Urb. – accepted
  Euphorbia cameronii N.E. Br. – accepted
  Euphorbia campestris S. Geuns – not accepted
  Euphorbia campestris var. esuliformis (S. Schauer ex Nees & S. Schauer) Boiss. – not accepted
  Euphorbia campestris var. foliosa Millsp. – not accepted
  Euphorbia campestris var. seemannii (Klotzsch) Boiss. – not accepted
  Euphorbia campestris var. subpuberula Greenm. – not accepted
  Euphorbia canaliculata Lam. – not accepted
  Euphorbia canaliculata Pers. – not accepted
  Euphorbia canaliculata Lodd. – not accepted
  Euphorbia canariensis L. – accepted
  Euphorbia canariensis f. viridis G. Kunkel – not accepted
  Euphorbia canariensis var. spiralis Bolle ex Boiss. – not accepted
  Euphorbia candelabrum Trémaux ex Kotschy – accepted
  Euphorbia candelabrum Welw. ex Hiern – not accepted
  Euphorbia candelabrum var. bilocularis (N.E. Br.) S. Carter – accepted
  Euphorbia candelabrum var. candelabrum Trémaux ex Kotschy – accepted
  Euphorbia canescens L. – not accepted
  Euphorbia cannellii L.C. Leach – accepted
  Euphorbia cantabrica Rouy – not accepted
  Euphorbia canuti Parl. – not accepted
  Euphorbia cap-saintemariensis Rauh – not accepted
  Euphorbia capansa Ducke – not accepted
  Euphorbia capazii Caball. – not accepted
  Euphorbia caperata McVaugh – accepted
  Euphorbia caperonioides R.A. Dyer & P.G. Mey. – accepted
  Euphorbia capillaris Gagnep. – accepted
  Euphorbia capitata Lam. – not accepted
  Euphorbia capitellata Engelm. – accepted – head sandmat, capitate sandmat, head spurge
  Euphorbia capitellata var. laxiflora S. Watson – not accepted
  Euphorbia capitellata var. typica L.C. Wheeler – not accepted
  Euphorbia capitulata Rchb. – accepted
  Euphorbia capmanambatoensis Rauh – accepted
  Euphorbia capsaintemariensis Rauh – accepted
  Euphorbia capsaintemariensis var. tulearensis Rauh – not accepted
  Euphorbia captiosa N.E. Br. – not accepted
  Euphorbia capuronii Ursch & Leandri – accepted
  Euphorbia capuronii Leandri – not accepted
  Euphorbia caput-aureum Denis – accepted
  Euphorbia caput-medusae L. – accepted
  Euphorbia caput-medusae var. geminata Aiton – not accepted
  Euphorbia caput-medusae var. major Aiton – not accepted
  Euphorbia caracasana (Klotzsch & Garcke) Boiss. – not accepted
  Euphorbia cardiophylla Boiss. & Heldr. – not accepted
  Euphorbia careyi F. Muell. – not accepted
  Euphorbia carinata Donn – not accepted
  Euphorbia carinifolia N.E. Br. – accepted
  Euphorbia carinthiaca Traunf. ex Boiss. – not accepted
  Euphorbia carinulata P.R.O. Bally & S. Carter – accepted
  Euphorbia carissoides F.M. Bailey – accepted
  Euphorbia carmenensis Rose – not accepted
  Euphorbia carniolica Jacq. – accepted
  Euphorbia carniolica Scop. ex Brot. – not accepted
  Euphorbia carniolica Lapeyr. – not accepted
  Euphorbia carniolica DC. – not accepted
  Euphorbia carniolica f. expansa (Janka) Prodán – not accepted
  Euphorbia carniolica ssp. expansa (Janka) Nyman – not accepted
  Euphorbia carniolica var. ambigua (Waldst. & Kit. ex Willd.) Nyman – not accepted
  Euphorbia carnosa Paulsen – not accepted
  Euphorbia carpasus Ehrenb. ex Boiss. – not accepted
  Euphorbia carpatica Wol. – accepted
  Euphorbia cartaginiensis Porta & Rigo – not accepted
  Euphorbia carteriana P.R.O. Bally – accepted
  Euphorbia carullae Sennen – not accepted
  Euphorbia carunculata Waterf. – accepted – sanddune sandmat, sand-dune spurge
  Euphorbia carunculifera L.C. Leach – accepted
  Euphorbia carunculifera ssp. subfastigiata L.C. Leach – not accepted
  Euphorbia cashmeriana Royle – accepted
  Euphorbia cassia Boiss. – accepted
  Euphorbia cassia ssp. cassia Boiss. – accepted
  Euphorbia cassia ssp. rigoi (Boiss. ex Freyn) Holmboe – accepted
  Euphorbia cassioides C. Presl – not accepted
  Euphorbia cassythoides Boiss. – accepted
  Euphorbia castillonii Lavranos – not accepted
  Euphorbia catamarcensis (Croizat) Subils – accepted
  Euphorbia cataractarum S. Carter – accepted
  Euphorbia catenata (S. Carter) Bruyns – accepted
  Euphorbia caterviflora N.E. Br. – accepted
  Euphorbia cattimandoo Elliot ex Wight – accepted
  Euphorbia caucasica Dubovik – not accepted
  Euphorbia caudata Boiss. & Hausskn. – not accepted
  Euphorbia caudiculosa Boiss. – accepted
  Euphorbia caunculata Waterf. – not accepted
  Euphorbia cavaleriei H. Lév. & Vaniot – not accepted
  Euphorbia cayensis Millsp. – accepted
  Euphorbia cebrina Hochst. ex Klotzsch & Garcke – not accepted
  Euphorbia cechica Opiz – not accepted
  Euphorbia cedrorum Rauh & Hebding – accepted
  Euphorbia celastroides Boiss. – accepted – `ekoko
  Euphorbia celastroides var. amplectens Sherff – not accepted – `ekoko
  Euphorbia celastroides var. arenisaxosa H. St. John – not accepted
  Euphorbia celastroides var. celastroides Boiss. – not accepted – `ekoko
  Euphorbia celastroides var. halawana Sherff – not accepted
  Euphorbia celastroides var. hanapepensis Sherff – not accepted – `ekoko
  Euphorbia celastroides var. haupuana Sherff – not accepted
  Euphorbia celastroides var. humbertii Sherff – not accepted
  Euphorbia celastroides var. ingrata O. Deg. & Sherff – not accepted
  Euphorbia celastroides var. kaenana Sherff – not accepted – `ekoko
  Euphorbia celastroides var. kealiana Sherff – not accepted
  Euphorbia celastroides var. kohalana Sherff – not accepted
  Euphorbia celastroides var. laehiensis O. Deg., I. Deg. & Sherff – not accepted – `ekoko
  Euphorbia celastroides var. limahuliensis H. St. John – not accepted
  Euphorbia celastroides var. lorifolia (A. Gray ex H. Mann) Sherff – not accepted – `ekoko
  Euphorbia celastroides var. mauiensis Sherff – not accepted
  Euphorbia celastroides var. moomomiana Sherff – not accepted
  Euphorbia celastroides var. nelsonii H. St. John – not accepted
  Euphorbia celastroides var. nematopoda Sherff – not accepted
  Euphorbia celastroides var. niuensis Sherff – not accepted
  Euphorbia celastroides var. odonatoides O. Deg. & Sherff – not accepted
  Euphorbia celastroides var. pseudoniuensis O. Deg. & Sherff – not accepted
  Euphorbia celastroides var. saxicola O. Deg. & Sherff ex Sherff – not accepted
  Euphorbia celastroides var. stokesii (C.N. Forbes) Sherff – not accepted – `ekoko
  Euphorbia celastroides var. tomentella (Boiss.) Oudejans – not accepted – `ekoko
  Euphorbia celastroides var. typica Sherff – not accepted
  Euphorbia celastroides var. waikoluensis Sherff – not accepted
  Euphorbia celata R.A. Dyer – accepted
  Euphorbia celerieri (Emb.) Emb. ex Vindt – accepted
  Euphorbia centralis B.G. Thomson – accepted
  Euphorbia centunculoides Kunth – accepted
  Euphorbia ceratocarpa Ten. – accepted
  Euphorbia cerebrina Hochst. ex Boiss. – not accepted
  Euphorbia cereiformis L. – accepted
  Euphorbia cereiformis var. echinata Salm-Dyck ex Boiss. – not accepted
  Euphorbia cereiformis var. submamillaris A. Berger – not accepted
  Euphorbia cerifera Alcocer – not accepted
  Euphorbia cerinthifolia Fisch. ex Boiss. – not accepted
  Euphorbia cernua Coss. & Durieu ex Boiss. – not accepted
  Euphorbia ceroderma I.M. Johnst. – accepted
  Euphorbia cerralvensis Maya-Lastra & V.W. Steinm. – accepted
  Euphorbia cervicornis Boiss. – not accepted
  Euphorbia cervicornu Baill. – accepted
  Euphorbia cestrifolia Kunth – accepted
  Euphorbia chaborasia Gomb. – accepted
  Euphorbia chaculana Donn. Sm. – not accepted
  Euphorbia chaetocalyx (Boiss.) Tidestr. – accepted – bristlecup sandmat
  Euphorbia chaetocalyx var. chaetocalyx (Boiss.) Tidestr. – accepted – bristlecup sandmat
  Euphorbia chaetocalyx var. triligulata (L.C. Wheeler) M.C. Johnst. – accepted – bristlecup sandmat, Triligulate bristlecup sandmat
  Euphorbia chaixiana Timb.-Lagr. – not accepted
  Euphorbia chalicophila Weath. – not accepted
  Euphorbia chamaebuxus Bernard ex Gren. & Godr. – not accepted
  Euphorbia chamaecaula Weath. – not accepted
  Euphorbia chamaeclada Ule – accepted
  Euphorbia chamaecormos Chiov. – not accepted
  Euphorbia chamaepeploides Lotsy – not accepted
  Euphorbia chamaepeplus Boiss. & Gaill. – accepted
  Euphorbia chamaepeplus var. angustifolia Danin – not accepted
  Euphorbia chamaepeplus var. sinaica Boiss. – not accepted
  Euphorbia chamaerrhodos Boiss. – accepted
  Euphorbia chamaerrhodos var. hirsuta Chodat & Hassl. – not accepted
  Euphorbia chamaesula Boiss. – accepted – mountain spurge
  Euphorbia chamaesula var. subdentata (Engelm.) Norton – not accepted
  Euphorbia chamaesyce auct. non L. – not accepted
  Euphorbia chamaesyce L. – accepted
  Euphorbia chamaesyce var. canescens (L.) Boiss. – not accepted
  Euphorbia chamaesyce var. glabra Roep. – not accepted
  Euphorbia chamaesyce var. glabra C.A. Mey. – not accepted
  Euphorbia chamaesyce var. glabriuscula Lange – not accepted
  Euphorbia chamaesyce var. massiliensis (DC.) Thell. – not accepted
  Euphorbia chamaesyce var. pilosa Roep. – not accepted
  Euphorbia chamaesyce var. pilosa C.A. Mey. – not accepted
  Euphorbia chamaesycoides B. Nord. – accepted
  Euphorbia chamberlinii I.M. Johnst. – accepted
  Euphorbia chamissonis (Klotzsch & Garcke) Boiss. – accepted
  Euphorbia chankoana Vorosch. – not accepted
  Euphorbia chapmanii Oudejans – not accepted – Chapman's spurge
  Euphorbia characias L. – accepted – Albanian spurge
  Euphorbia characias ssp. characias L. – accepted
  Euphorbia characias ssp. veneta (Willd.) Litard. – not accepted
  Euphorbia characias ssp. wulfenii (Hoppe ex W. Koch) Radcl.-Sm. – accepted
  Euphorbia characias var. eriocarpa (Bertol.) Nyman – not accepted
  Euphorbia characias var. lusitanica O. Bolňs – not accepted
  Euphorbia charleswilsoniana V. Vlk – accepted
  Euphorbia chasmophila Rech. f. & Aellen – not accepted
  Euphorbia cheiradenia Boiss. & Hohen. – accepted
  Euphorbia cheirolepis Fisch. & C.A. Mey. ex Ledeb. – accepted
  Euphorbia cheirolepis var. heterophylla Boiss. – not accepted
  Euphorbia chenopodiifolia Boiss. – accepted
  Euphorbia chersina N.E. Br. – accepted
  Euphorbia chersonesa Huft – accepted
  Euphorbia chesneyi (Klotzsch & Garcke) Boiss. – not accepted
  Euphorbia chevalieri (N.E. Br.) Bruyns – accepted
  Euphorbia chiapensis Brandegee – not accepted
  Euphorbia chilensis Gay – not accepted
  Euphorbia chimaera Lipsky – not accepted
  Euphorbia chiogenes (Small) Oudejans – not accepted
  Euphorbia chiogenoides Rusby – not accepted
  Euphorbia chiribensis V.W. Steinm. & Felger – accepted
  Euphorbia chrysochaeta W. Fitzg. – not accepted
  Euphorbia chrysocoma H. Lév. & Vaniot – not accepted
  Euphorbia chrysocoma var. glaucophylla H. Lév. & Vaniot – not accepted
  Euphorbia chrysophylla (Klotzsch & Garcke) Klotzsch ex Boiss. – not accepted
  Euphorbia cibdela N.E. Br. – accepted
  Euphorbia cilicica Boiss. – not accepted
  Euphorbia ciliolata Pax – not accepted
  Euphorbia cinerascens Engelm. – accepted – ashy sandmat
  Euphorbia cinerascens var. appendiculata Engelm. – not accepted
  Euphorbia cinerea W. Fitzg. – not accepted
  Euphorbia cirsioides Costantin & Gallaud – not accepted
  Euphorbia citrina S. Carter – accepted
  Euphorbia clandestina Jacq. – accepted
  Euphorbia clarae (Malaisse & Lecron) Bruyns – accepted
  Euphorbia clarionensis Brandegee – not accepted
  Euphorbia clarkeana Hook. f. – accepted
  Euphorbia classenii P.R.O. Bally & S. Carter – accepted
  Euphorbia clava Jacq. – accepted
  Euphorbia clavarioides Boiss. – accepted
  Euphorbia clavarioides var. truncata (N.E. Br.) A.C. White, R.A. Dyer & B. Sloane – not accepted
  Euphorbia clavata Salisb. – not accepted
  Euphorbia clavidigitata Gage – accepted
  Euphorbia clavigera N.E. Br. – accepted
  Euphorbia clavigera Lacaita – not accepted
  Euphorbia claytonioides Pax – accepted
  Euphorbia clementei Boiss. – accepted
  Euphorbia clementei Bourg. ex Boiss. – not accepted
  Euphorbia clementei f. hozmariensis Pau – not accepted
  Euphorbia clementei f. maroccana (Maire) Vindt – not accepted
  Euphorbia clementei ssp. clementei Boiss. – accepted
  Euphorbia clementei ssp. faurei (Maire) Vicens, Molero & C. Blanché – accepted
  Euphorbia clementei ssp. villosa (Faure & Maire) Vicens, Molero & C. Blanché – accepted
  Euphorbia clementei var. angustifolia Lange – not accepted
  Euphorbia clementei var. euclementei Maire – not accepted
  Euphorbia clementei var. maroccana Maire – not accepted
  Euphorbia clementei var. puberula (Emb.) Maire – not accepted
  Euphorbia clementei var. villifolia Maire – not accepted
  Euphorbia clementii Domin – not accepted
  Euphorbia cleopatra Baill. – not accepted
  Euphorbia clivicola R.A. Dyer – accepted
  Euphorbia clusiifolia Hook. & Arn. – accepted – forest sandmat
  Euphorbia clusiifolia var. grandiflora Hillebr. – not accepted
  Euphorbia clutioides (G. Forst.) C.A. Gardner – not accepted
  Euphorbia coalcomanensis (Croizat) V.W. Steinm. – accepted
  Euphorbia coccinea B. Heyne ex Roth – accepted
  Euphorbia coccinea Willd. ex Boiss. – not accepted
  Euphorbia coderiana DC. – not accepted
  Euphorbia coerulans Pax – accepted
  Euphorbia cofradiana Brandegee – not accepted
  Euphorbia coghlanii F.M. Bailey – accepted
  Euphorbia cognata (Klotzsch) Boiss. – not accepted
  Euphorbia colchica (Litv.) Geltman – not accepted
  Euphorbia colimae Rose – not accepted
  Euphorbia collenetteae D. Al-Zahrani & El-Karemy – accepted – Marar, Saab, Scharath
  Euphorbia colletioides Benth. – accepted
  Euphorbia colliculina A.C. White, R.A. Dyer & B. Sloane – accepted
  Euphorbia colligata V.W. Steinm. – accepted
  Euphorbia collina Phil. – not accepted
  Euphorbia collina Willd. ex Ledeb. – not accepted
  Euphorbia collina Brandegee – not accepted
  Euphorbia collina var. andina (Phil.) Subils – not accepted
  Euphorbia collina var. chrysophylla (Klotzsch & Garcke) Subils – not accepted
  Euphorbia collina var. glaucescens (Chodat & Wilczek) Subils – not accepted
  Euphorbia collina var. minor (Hicken) Subils – not accepted
  Euphorbia collina var. nahuelhuapina (Croizat) Subils – not accepted
  Euphorbia collina var. patagonica (Hieron.) Subils – not accepted
  Euphorbia collina var. spathulata (Chodat & Wilczek) Subils – not accepted
  Euphorbia colorata Engelm. – accepted
  Euphorbia colubrina P.R.O. Bally & S. Carter – accepted
  Euphorbia columnaris P.R.O. Bally – accepted
  Euphorbia comans W. Fitzg. – not accepted
  Euphorbia commelinii DC. – not accepted
  Euphorbia commiphoroides Dinter – not accepted
  Euphorbia commutata Engelm. ex A. Gray – accepted – tinted woodland spurge, tinted euphorbia
  Euphorbia commutata var. erecta Norton – not accepted
  Euphorbia comonduana Millsp. – not accepted
  Euphorbia comosa Vell. – accepted
  Euphorbia complanata Warb. – accepted
  Euphorbia complexa R.A. Dyer – accepted
  Euphorbia compressa Boiss. – accepted
  Euphorbia concanensis Janarth. & S.R. Yadav – accepted
  Euphorbia conceptionis Rupr. ex Boiss. – not accepted
  Euphorbia condensata Fisch. ex M. Bieb. – not accepted
  Euphorbia condylocarpa M. Bieb. – accepted
  Euphorbia conferta (Small) Oudejans – not accepted – Everglade Key sandmat
  Euphorbia conferta (Small) B.E. Sm. – accepted – Everglade Key sandmat
  Euphorbia confertiflora Volkens – not accepted
  Euphorbia confinalis R.A. Dyer – accepted
  Euphorbia confinalis ssp. confinalis R.A. Dyer – accepted
  Euphorbia confinalis ssp. rhodesica L.C. Leach – accepted
  Euphorbia conformis N.E. Br. – not accepted
  Euphorbia confusa Blume ex Boiss. – not accepted
  Euphorbia congenera Blume – not accepted
  Euphorbia congesta Willd. – not accepted
  Euphorbia congestiflora L.C. Leach – accepted
  Euphorbia conifera Steph. ex Boiss. – not accepted
  Euphorbia coniosperma Boiss. & Buhse – accepted
  Euphorbia conjuncta Millsp. – not accepted
  Euphorbia connata Boiss. – accepted
  Euphorbia consanguinea Schrenk – accepted
  Euphorbia consanguinea Klotzsch – not accepted
  Euphorbia consanguinea Engelm. ex Boiss. – not accepted
  Euphorbia consobrina N.E. Br. – not accepted
  Euphorbia consoquitlae Brandegee – not accepted
  Euphorbia conspicua N.E. Br. – accepted
  Euphorbia contorta L.C. Leach – accepted
  Euphorbia controversa N.E. Br. – not accepted
  Euphorbia convolvuloides Hochst. ex Benth. – accepted
  Euphorbia conzattii V.W. Steinm. – accepted
  Euphorbia cooperi N.E. Br. ex A. Berger – accepted – candelabra tree
  Euphorbia cooperi var. calidicola L.C. Leach – accepted
  Euphorbia cooperi var. cooperi N.E. Br. ex A. Berger – accepted
  Euphorbia cooperi var. ussanguensis (N.E. Br.) L.C. Leach – accepted
  Euphorbia copiapina Phil. – accepted
  Euphorbia corallifera M.E. Jones – not accepted
  Euphorbia corallioides L. – accepted
  Euphorbia corallioides var. denudata Boiss. – not accepted
  Euphorbia corallothamnus Dinter – not accepted
  Euphorbia cordata Meyen – not accepted
  Euphorbia cordata Schrank – not accepted
  Euphorbia cordata Larrańaga – not accepted
  Euphorbia cordatella Oudejans – accepted
  Euphorbia cordeiroae P. Carrillo & V.W. Steinm. – accepted
  Euphorbia cordellata Haw. – not accepted
  Euphorbia cordifolia Elliott – accepted – heartleaf sandmat
  Euphorbia cordifolia C.A. Mey. ex Boiss. – not accepted
  Euphorbia coriacea K. Koch – not accepted
  Euphorbia coriariifolia Boiss. – not accepted
  Euphorbia corifolia Lam. – not accepted
  Euphorbia cornastra (Dressler) Radcl.-Sm. – accepted
  Euphorbia corniculata R.A. Dyer – accepted
  Euphorbia cornigera Boiss. – accepted
  Euphorbia cornigera var. cognata (Klotzsch & Garcke) Binojk. & N.P. Balakr. – accepted
  Euphorbia cornigera var. cornigera Boiss. – accepted
  Euphorbia cornuta Pers. – not accepted
  Euphorbia corollata L. – accepted – floweringspurge euphorbia, flowering spurge
  Euphorbia corollata var. angustifolia Elliott – not accepted
  Euphorbia corollata var. apocynifolia (Small) Millsp. – not accepted
  Euphorbia corollata var. glauca Millsp. – not accepted
  Euphorbia corollata var. grandiflora Boiss. – not accepted
  Euphorbia corollata var. hirsuta Macnab – not accepted
  Euphorbia corollata var. joorii Norton – not accepted
  Euphorbia corollata var. molle Millsp. – not accepted
  Euphorbia corollata var. mollis Millsp. – not accepted
  Euphorbia corollata var. paniculata Boiss. – not accepted
  Euphorbia corollata var. subpetiolata Boiss. – not accepted
  Euphorbia corollata var. viridiflora Farw. – not accepted
  Euphorbia corollata var. zinniiflora (Small) H.E. Ahles – not accepted
  Euphorbia coronata Thunb. – not accepted
  Euphorbia correllii M.C. Johnst. – accepted
  Euphorbia correntina Parodi – accepted
  Euphorbia corrigioloides Boiss. – accepted
  Euphorbia corsica Req. – accepted
  Euphorbia corymbosa N.E. Br. – accepted
  Euphorbia corynoclada F. Muell. – not accepted
  Euphorbia coscinosperma Rchb. – not accepted
  Euphorbia cossoniana Boiss. – accepted
  Euphorbia cossoniana var. maroccana Batt. – not accepted
  Euphorbia costata Schur – not accepted
  Euphorbia costeana (Rouy) P. Fourn. – not accepted
  Euphorbia cotinifolia L. – accepted – Mexican shrubby spurge
  Euphorbia cotinifolia ssp. cotinoides (Miq.) Christenh. – not accepted
  Euphorbia cotinoides Miq. – not accepted
  Euphorbia cotinoides var. riedeliana (Klotzsch & Garcke) Müll. Arg. – not accepted
  Euphorbia cotinoides var. verrucosa Boiss. – not accepted
  Euphorbia coudercii f. glaberrima Gagnep. – not accepted
  Euphorbia cowellii (Millsp. ex Britton) Oudejans – accepted – Cowell's sandmat
  Euphorbia cozumelensis Millsp. – accepted
  Euphorbia cozumelensis var. pilosulca Millsp. – not accepted
  Euphorbia craspedia Boiss. – accepted
  Euphorbia crassinodis Urb. – accepted
  Euphorbia crassipes Marloth – accepted
  Euphorbia creberrima McVaugh – accepted
  Euphorbia crebrifolia S. Carter – accepted
  Euphorbia cremersii Rauh & Razaf. – accepted
  Euphorbia cremersii f. viridifolia Rauh – accepted
  Euphorbia cremersii var. cremersii Rauh & Razaf. – accepted
  Euphorbia cremersii var. rakatozafyi (Cremers) Rauh – accepted
  Euphorbia crenata (N.E. Br.) Bruyns – accepted
  Euphorbia crenulata Engelm. – accepted – Chinese caps, Chinesecaps
  Euphorbia crenulata var. franciscana Norton – not accepted
  Euphorbia crepitata L.C. Wheeler – accepted
  Euphorbia crepitata var. crepitata L.C. Wheeler – accepted
  Euphorbia crepitata var. longa M.C. Johnst. – accepted
  Euphorbia crepuscula (L.C. Wheeler) V.W. Steinm. & Felger – accepted
  Euphorbia cressoides M.C. Johnst. – accepted
  Euphorbia cretica Mill. – not accepted
  Euphorbia cretophila Klokov – not accepted
  Euphorbia crispa (Haw.) Sweet – not accepted
  Euphorbia crispata Willd. ex Hornem. – not accepted
  Euphorbia crispata Lem. – not accepted
  Euphorbia cristata B. Heyne ex Roth – accepted
  Euphorbia cristata D. Dietr. – not accepted
  Euphorbia croizatii Leandri – accepted
  Euphorbia croizatii (Hurus.) Kitag. – not accepted
  Euphorbia crossadenia Pax & K. Hoffm. – accepted
  Euphorbia crotonoides Boiss. – accepted
  Euphorbia crotonoides ssp. crotonoides Boiss. – accepted
  Euphorbia crotonoides ssp. narokensis S. Carter – accepted
  Euphorbia cruentata Graham – not accepted
  Euphorbia crypta Ewest – accepted
  Euphorbia cryptocaulis M.G. Gilbert – accepted
  Euphorbia cryptorubra N.C. Taylor & M. Terry – accepted
  Euphorbia cryptospinosa P.R.O. Bally – accepted
  Euphorbia cuatrecasasii Pau – not accepted
  Euphorbia cubensis Boiss. – accepted
  Euphorbia cuchumatanensis Standl. & Steyerm. – not accepted
  Euphorbia culminicola Ant. Molina – not accepted
  Euphorbia cumbrae Boiss. – accepted
  Euphorbia cumulata R.A. Dyer – accepted
  Euphorbia cumulicola (Small) Oudejans – accepted – coastal dune sandmat
  Euphorbia cuneata Vahl – accepted
  Euphorbia cuneata ssp. cretacea S. Carter – accepted
  Euphorbia cuneata ssp. cuneata Vahl – accepted
  Euphorbia cuneata ssp. lamproderma S. Carter – accepted
  Euphorbia cuneata ssp. spinescens (Pax) S. Carter – accepted
  Euphorbia cuneata ssp. wajirensis S. Carter – accepted
  Euphorbia cuneata var. carpasus Boiss. – not accepted
  Euphorbia cuneata var. perrottetii (Jaub. & Spach) Boiss. – not accepted
  Euphorbia cuneata var. pumilans S. Carter – accepted
  Euphorbia cuneata var. spinescens (Pax) S. Carter – accepted
  Euphorbia cuneifolia Guss. – accepted
  Euphorbia cuneifolia Roxb. – not accepted
  Euphorbia cuneneana L.C. Leach – accepted
  Euphorbia cuneneana ssp. cuneneana L.C. Leach – accepted
  Euphorbia cuneneana ssp. rhizomatosa L.C. Leach – accepted
  Euphorbia cupanii Guss. ex Bertol. – not accepted
  Euphorbia cupanii A. Schultz ex Gren. & Godr. – not accepted
  Euphorbia cupanii var. spartioides (Jacq.) Boiss. – not accepted
  Euphorbia cuphosperma (Engelm.) Boiss. – accepted – hairy-fruit spurge, Hairy-fruited Spurge
  Euphorbia cupricola (Malaisse & Lecron) Bruyns – accepted
  Euphorbia cuprispina S. Carter – accepted
  Euphorbia cupularis Boiss. – accepted
  Euphorbia curocana L.C. Leach – not accepted
  Euphorbia currorii N.E. Br. – not accepted
  Euphorbia curtifolia Chaub. – not accepted
  Euphorbia curtisii Engelm. – accepted – Curtis' spurge, sandhills spurge
  Euphorbia curtisii var. longipes Boiss. – not accepted
  Euphorbia curvirama R.A. Dyer – accepted
  Euphorbia cuspidata Bertol. – accepted
  Euphorbia cuspidata Bernh. ex Krauss – not accepted
  Euphorbia cussonioides P.R.O. Bally – accepted
  Euphorbia cyanofolia Ewest – accepted
  Euphorbia cyanogala C. Wright ex Griseb. – not accepted
  Euphorbia cyanophylla H. Lév. – not accepted
  Euphorbia cyathophora Murray – accepted – fire on the mountain, fire-on-the-mountain, painted leaf
  Euphorbia cybirensis Boiss. – accepted
  Euphorbia cybirensis var. acutifolia Boiss. – not accepted
  Euphorbia cybirensis var. dehiscens Boiss. – not accepted
  Euphorbia cybirensis var. longifolia Boiss. – not accepted
  Euphorbia cybirensis var. microcarpa Boiss. – not accepted
  Euphorbia cybirensis var. valerianifolia (Lam.) Nyman – not accepted
  Euphorbia cylindrica Marloth ex A.C. White, R.A. Dyer & B. Sloane – accepted
  Euphorbia cylindrifolia Marn.-Lap. & Rauh – accepted
  Euphorbia cylindrifolia ssp. cylindrifolia Marn.-Lap. & Rauh – accepted
  Euphorbia cylindrifolia ssp. tuberifera Rauh – accepted
  Euphorbia cymbifera (Schltdl.) V.W. Steinm. – accepted
  Euphorbia cymbiformis Rusby – accepted
  Euphorbia cymosa Poir. – accepted
  Euphorbia cynanchoides Drake – not accepted
  Euphorbia cyparissias L. – accepted – cypress spurge, graveyard spurge
  Euphorbia cyparissias var. esuloides DC. – not accepted
  Euphorbia cyparissias var. major Boiss. – not accepted
  Euphorbia cyparissioides Pax – accepted
  Euphorbia cyparissioides var. minor N.E. Br. – not accepted
  Euphorbia cypria Boiss. – not accepted
  Euphorbia cyprianii Maire & Sennen – not accepted
  Euphorbia cyri V.W. Steinm. – accepted
  Euphorbia cyrtophylla (Prokh.) Prokh. – accepted
  Euphorbia czerepanovii Geltman – accepted
  Euphorbia daghestanica Geltman – accepted
  Euphorbia dahurica Peschkova – accepted
  Euphorbia dalettiensis M.G. Gilbert – accepted
  Euphorbia dallachyana Baill. – accepted
  Euphorbia dalmatica Vis. – not accepted
  Euphorbia dalmatica f. isophylla K. Malý – not accepted
  Euphorbia damarana L.C. Leach – accepted
  Euphorbia damascena Boiss. – not accepted
  Euphorbia damasoi Oudejans – accepted
  Euphorbia daphnoides Balf. f. – accepted
  Euphorbia daphnoides Baill. – not accepted
  Euphorbia darbandensis N.E. Br. – accepted
  Euphorbia darlingtonii A. Gray – not accepted
  Euphorbia darlingtonii var. glabra Boiss. – not accepted
  Euphorbia dasyacantha S. Carter – accepted
  Euphorbia dasycarpa Coss. ex Batt. & Trab. – not accepted
  Euphorbia dasyclada Dusén – not accepted
  Euphorbia dauana S. Carter – accepted
  Euphorbia davidii Subils – accepted – David's spurge, Toothed Spurge
  Euphorbia daviesii E.A. Bruce – accepted
  Euphorbia davisii M.S. Khan – accepted
  Euphorbia davyi N.E. Br. – accepted
  Euphorbia dawei N.E. Br. – accepted
  Euphorbia debilispina L.C. Leach – accepted
  Euphorbia decariana Croizat – not accepted
  Euphorbia decaryi Guillaumin – accepted
  Euphorbia decaryi var. ampanihyensis Cremers – accepted
  Euphorbia decaryi var. cap-saintemariensis (Rauh) Cremers – not accepted
  Euphorbia decaryi var. capsaintemariensis (Rauh) Cremers – not accepted
  Euphorbia decaryi var. crassicaulis (Rauh) J.-P. Castillon & J.-B. Castillon – accepted
  Euphorbia decaryi var. decaryi Guillaumin – accepted
  Euphorbia decaryi var. robinsonii Cremers – accepted
  Euphorbia decaryi var. spirosticha Rauh & Buchloh – accepted
  Euphorbia deccanensis V.S. Raju – accepted
  Euphorbia deccanensis var. deccanensis V.S. Raju – accepted
  Euphorbia deccanensis var. nallamalayana (J.L. Ellis) V.S. Raju – accepted
  Euphorbia decepta N.E. Br. – accepted
  Euphorbia decidua P.R.O. Bally & L.C. Leach – accepted
  Euphorbia decliviticola L.C. Leach – accepted
  Euphorbia decorsei Drake – accepted
  Euphorbia decumbens (Forssk.) Willd. – not accepted
  Euphorbia decussata Salisb. – not accepted
  Euphorbia decussata E. Mey. ex Boiss. – not accepted
  Euphorbia dedzana L.C. Leach – accepted
  Euphorbia deflexa Sibth. & Sm. – accepted
  Euphorbia deflexa ssp. deflexa Sibth. & Sm. – accepted
  Euphorbia deflexa ssp. purpureosuffusa (Rech. f.) Biel & Kit Tan – accepted
  Euphorbia deflexa var. purpureosuffusa Rech. f. – not accepted
  Euphorbia defoliata Urb. – accepted
  Euphorbia degenerata D. Dietr. – not accepted
  Euphorbia degeneri Sherff – accepted – beach sandmat
  Euphorbia degeneri var. molokaiensis Sherff – not accepted
  Euphorbia degeneri var. typica Sherff – not accepted
  Euphorbia deightonii Croizat – accepted
  Euphorbia dejecta N.E. Br. – not accepted
  Euphorbia dekindtii Pax – accepted
  Euphorbia delicatissima S. Carter – accepted
  Euphorbia delicatula auct. non Boiss. – not accepted
  Euphorbia delicatula Boiss. – accepted
  Euphorbia delphinensis Ursch & Leandri – accepted
  Euphorbia deltobracteata (Prokh.) Prokh. – accepted
  Euphorbia deltoidea Engelm. ex Chapm. – accepted – wedge sandmat
  Euphorbia deltoidea ssp. adhaerens (Small) Oudejans – accepted – wedge sandmat
  Euphorbia deltoidea ssp. deltoidea Engelm. ex Chapm. – accepted – wedge sandmat
  Euphorbia deltoidea ssp. pinetorum (Small) Oudejans – accepted – wedge sandmat
  Euphorbia deltoidea ssp. serpyllum (Small) Ya Yang – accepted – wedge sandmat
  Euphorbia deltoidea var. adhaerens (Small) Oudejans – not accepted
  Euphorbia deltoidea var. deltoidea Engelm. ex Chapm. – not accepted
  Euphorbia deltoidea var. serpyllum (Small) Oudejans – not accepted
  Euphorbia demissa L.C. Leach – accepted
  Euphorbia demnatensis Coss. ex Batt. & Trab. – not accepted
  Euphorbia dendroides L. – accepted – tree spurge
  Euphorbia denisiana Guillaumin – accepted
  Euphorbia denisii Oudejans – accepted
  Euphorbia densa Schrenk – accepted
  Euphorbia densa Schott & Kotschy ex Tchich. – not accepted
  Euphorbia densa ssp. badghysi Botsch. – accepted
  Euphorbia densa ssp. densa Schrenk – accepted
  Euphorbia densiflora (Klotzsch & Garcke) Klotzsch – accepted
  Euphorbia densifolia K. Koch – accepted
  Euphorbia densispina S. Carter – accepted
  Euphorbia densiuscula Popov – accepted
  Euphorbia densiusculiformis (Pazij) Botsch. – accepted
  Euphorbia dentata Michx. – accepted – toothed spurge, toothedleaf poinsettia, toothed euphorbia
  Euphorbia dentata auct. non Michx. – not accepted
  Euphorbia dentata f. cuphosperma (Engelm.) Fernald – not accepted
  Euphorbia dentata var. cuphosperma Engelm. – not accepted
  Euphorbia dentata var. dentata Michx. – not accepted – toothedleaf poinsettia, toothed spurge
  Euphorbia dentata var. gracillima Millsp. – not accepted
  Euphorbia dentata var. lancifolia Farw. – not accepted
  Euphorbia dentata var. lasiocarpa Boiss. – not accepted – toothed spurge, toothedleaf poinsettia
  Euphorbia dentata var. linearis Engelm. ex Boiss. – not accepted
  Euphorbia dentata var. rigida Engelm. – not accepted
  Euphorbia denticulata Lam. – accepted
  Euphorbia dentosa I.M. Johnst. – accepted
  Euphorbia denudata Bertol. – not accepted
  Euphorbia depauperata Hochst. ex A. Rich. – accepted
  Euphorbia depauperata ssp. aprica Pax – not accepted
  Euphorbia depauperata var. depauperata Hochst. ex A. Rich. – accepted
  Euphorbia depauperata var. laevicarpa Friis & Vollesen – accepted
  Euphorbia depauperata var. pubescens Pax – accepted
  Euphorbia depauperata var. pubiflora N.E. Br. – not accepted
  Euphorbia depauperata var. trachycarpa (Pax) S. Carter – accepted
  Euphorbia depauperata var. tsetserrensis S. Carter – accepted
  Euphorbia deppeana Boiss. – accepted – Oahu sandmat
  Euphorbia depressa Torr. ex Spreng. – not accepted
  Euphorbia depressa Phil. ex Klotzsch & Garcke – not accepted
  Euphorbia derickii V.W. Steinm. – accepted
  Euphorbia descampsii (Pax) Bruyns – accepted
  Euphorbia deseglisei Boreau ex Boiss. – not accepted
  Euphorbia deserticola F. Muell. – not accepted
  Euphorbia desertorum Weinm. – not accepted
  Euphorbia desmondii Keay & Milne-Redh. – accepted
  Euphorbia despoliata (Menezes) Monod – not accepted
  Euphorbia dhofarensis S. Carter – accepted
  Euphorbia diazlunana (J. Lomelí & Sahagun) V.W. Steinm. – accepted
  Euphorbia dichotoma Forssk. – not accepted
  Euphorbia dichotoma Roxb. – not accepted
  Euphorbia dichroa S. Carter – accepted
  Euphorbia dictyosperma Fisch. & C.A. Mey. – not accepted
  Euphorbia dictyosperma var. leiococca Engelm. – not accepted
  Euphorbia dictyosperma var. mexicana Engelm. – not accepted
  Euphorbia dictyosperma var. multicaulis J.M. Coult. – not accepted
  Euphorbia didiereoides Denis ex Leandri – accepted
  Euphorbia diffusa Jacq. – not accepted
  Euphorbia diffusa Hook. f. – not accepted
  Euphorbia diffusa Dufour – not accepted
  Euphorbia digestiva Rojas – accepted
  Euphorbia digitata S. Watson – not accepted
  Euphorbia dilatata Hochst. ex A. Rich. – not accepted
  Euphorbia dilatata Torr. & A. Gray – not accepted
  Euphorbia dilatata E. Mey. – not accepted
  Euphorbia dilloniana Haager & Sedivá – accepted
  Euphorbia dilobadena S. Carter – accepted
  Euphorbia dilunguensis (Malaisse & Lecron) Bruyns – accepted
  Euphorbia diminuta S. Carter – accepted
  Euphorbia dimorphocaulon P.H. Davis – accepted
  Euphorbia dioeca Kunth – accepted
  Euphorbia dioeca var. indivisa Engelm. – not accepted
  Euphorbia dioica Hieron. – not accepted
  Euphorbia dioica f. parvifolia Hieron. – not accepted
  Euphorbia dioscoreoides Boiss. – accepted
  Euphorbia dioscoreoides ssp. attenuata V.W. Steinm. – accepted
  Euphorbia dioscoreoides ssp. dioscoreoides Boiss. – accepted
  Euphorbia disclusa N.E. Br. – not accepted
  Euphorbia discoidalis Chapm. – accepted – summer spurge
  Euphorbia discoidea (P.R.O. Bally) Bruyns – accepted
  Euphorbia discolor Ledeb. – accepted
  Euphorbia discolor Bertol. – not accepted
  Euphorbia discolor Klotzsch ex Boiss. – not accepted
  Euphorbia discolor Shuttlew. ex Boiss. – not accepted
  Euphorbia discolor (Klotzsch & Garcke) Boiss. – not accepted
  Euphorbia discolor ssp. karoi (Freyn) Bassargin – not accepted
  Euphorbia discolor var. glabra Loschk. & Polozhij – not accepted
  Euphorbia discolor var. pilosa Loschk. & Polozhij – not accepted
  Euphorbia discrepans S. Carter – accepted
  Euphorbia discreta N.E. Br. – not accepted
  Euphorbia dispersa L.C. Leach – accepted
  Euphorbia dissimilis Cordem. – not accepted
  Euphorbia dissitispina L.C. Leach – accepted
  Euphorbia distans W. Fitzg. – not accepted
  Euphorbia distincta Schur – not accepted
  Euphorbia distincta Stschegl. – not accepted
  Euphorbia distinctissima L.C. Leach – accepted
  Euphorbia distinguenda Schur – not accepted
  Euphorbia divaricata Jacq. – not accepted
  Euphorbia divaricata A. Cunn. ex Benth. – not accepted
  Euphorbia divergens Klotzsch – not accepted
  Euphorbia diversifolia Poir. – not accepted
  Euphorbia diversifolia Hochst. ex Boiss. – not accepted
  Euphorbia diversifolia Schrad. ex Steud. – not accepted
  Euphorbia diversifolia Willd. ex Boiss. – not accepted
  Euphorbia djimilensis Boiss. – accepted
  Euphorbia djurensis Schweinf. ex Pax – not accepted
  Euphorbia dobrogensis Prodán – not accepted
  Euphorbia dobrogensis f. latibracteata Prodán – not accepted
  Euphorbia dolichoceras S. Carter – accepted
  Euphorbia doloensis M.G. Gilbert – accepted
  Euphorbia domingensis Spreng. ex Boiss. – not accepted
  Euphorbia dominii Röhl. – not accepted
  Euphorbia donii Oudejans – accepted
  Euphorbia dorsiventralis Urb. – not accepted
  Euphorbia dracunculoides Lam. – accepted
  Euphorbia dracunculoides ssp. dracunculoides Lam. – accepted
  Euphorbia dracunculoides ssp. eudracunculoides Maire – not accepted
  Euphorbia dracunculoides ssp. flamandii (Batt.) Maire – accepted
  Euphorbia dracunculoides ssp. glebulosa (Coss. & Durieu) Maire – accepted
  Euphorbia dracunculoides ssp. hesperia Maire – accepted
  Euphorbia dracunculoides ssp. inconspicua (Ball) Maire – accepted
  Euphorbia dracunculoides ssp. intermedia (Maire) Maire – accepted
  Euphorbia dracunculoides ssp. melillensis Maire – not accepted
  Euphorbia dracunculoides ssp. volutiana Maire – accepted
  Euphorbia dracunculoides var. africana Rikli & Schröt. – not accepted
  Euphorbia dracunculoides var. ballii Maire – not accepted
  Euphorbia dracunculoides var. faurei Maire – not accepted
  Euphorbia dracunculoides var. pseudoafricana Maire – not accepted
  Euphorbia dracunculoides var. taourirtensis (Batt. & Trab.) Batt. – not accepted
  Euphorbia drastica Siev. – not accepted
  Euphorbia dregeana E. Mey. ex Boiss. – accepted
  Euphorbia dressleri V.W. Steinm. – accepted
  Euphorbia drummondii Boiss. – accepted
  Euphorbia drummondii var. dallachyana Baill. – not accepted
  Euphorbia drummondii var. erythropeplis Baill. – not accepted
  Euphorbia drummondii var. rubescens Benth. – not accepted
  Euphorbia drupifera Thonn. – accepted
  Euphorbia dubia Dierb. – not accepted
  Euphorbia dubovikii Oudejans – accepted
  Euphorbia duckei (Croizat) Oudejans – accepted
  Euphorbia duclouxii H. Lév. & Vaniot – not accepted
  Euphorbia dugandiana Croizat – accepted
  Euphorbia dulcis L. – accepted
  Euphorbia dulcis f. lanuginosa (Peterm.) Oudejans – not accepted
  Euphorbia dulcis ssp. angulata (Jacq.) Rouy – not accepted
  Euphorbia dulcis ssp. incompta (Ces.) Nyman – not accepted
  Euphorbia dulcis var. alpigena (A. Kern.) Nyman – not accepted
  Euphorbia dulcis var. chloradenia Boiss. – not accepted
  Euphorbia dulcis var. incompta (Ces.) Nyman – not accepted
  Euphorbia dulcis var. lanuginosa Peterm. – not accepted
  Euphorbia dulcis var. viridiflora (Waldst. & Kit.) Nyman – not accepted
  Euphorbia dumalis S. Carter – accepted
  Euphorbia dumeticola P.R.O. Bally & S. Carter – accepted
  Euphorbia dumetorum Coss. & Durieu ex Boiss. – not accepted
  Euphorbia dumosa A. Rich. – not accepted
  Euphorbia dumosa Boiss. – not accepted
  Euphorbia dumosa E. Mey. ex Boiss. – not accepted
  Euphorbia dunensis S. Carter – accepted
  Euphorbia durandoi Chabert – accepted
  Euphorbia duranii Ursch & Leandri – accepted
  Euphorbia duranii var. ankaratrae Ursch & Leandri – accepted
  Euphorbia duranii var. duranii Ursch & Leandri – accepted
  Euphorbia duriuscula Pax & K. Hoffm. ex Herzog – accepted
  Euphorbia duseimata R.A. Dyer – accepted
  Euphorbia dussii Krug & Urb. ex Duss – accepted
  Euphorbia duvalii Lecoq & Lamotte – accepted
  Euphorbia duvalii ssp. ruscinonensis (Boiss.) Kerguélen – not accepted
  Euphorbia dwyeri D.G. Burch – accepted
  Euphorbia eanophylla Croizat – accepted
  Euphorbia ebracteolata Hayata – accepted
  Euphorbia ebracteolata f. magna Y.N. Lee – not accepted
  Euphorbia ebracteolata var. anhweiensis (Hurus.) Oudejans – not accepted
  Euphorbia echinata Salm-Dyck – not accepted
  Euphorbia echinocarpa Sieber ex Boiss. – not accepted
  Euphorbia echinulata (Stapf) Bruyns – accepted
  Euphorbia echinus Hook. f. & Coss. – not accepted
  Euphorbia ecklonii (Klotzsch & Garcke) Baill. – accepted
  Euphorbia ecorniculata Kitam. – accepted
  Euphorbia edgeworthii Boiss. – accepted
  Euphorbia edmondii Hochr. – accepted
  Euphorbia eduardoi L.C. Leach – accepted
  Euphorbia edulis Lour. – not accepted
  Euphorbia edulis Sessé & Moç. – not accepted
  Euphorbia eendornensis Dinter – not accepted
  Euphorbia effusa Ehrenb. ex Boiss. – not accepted
  Euphorbia eggersii Urb. – accepted
  Euphorbia eglandulosa V.W. Steinm. – accepted
  Euphorbia ehrenbergii Sweet – not accepted
  Euphorbia eichleri Müll. Arg. – accepted
  Euphorbia eilensis S. Carter – accepted
  Euphorbia einensis G. Will. – accepted
  Euphorbia einensis var. anemoarenicola G. Will. – accepted
  Euphorbia einensis var. einensis G. Will. – accepted
  Euphorbia elastica Jum. – accepted
  Euphorbia elastica Marloth – not accepted
  Euphorbia elastica Poiss. & Pax – not accepted
  Euphorbia elastica Altam. & Rose – not accepted
  Euphorbia elata Brandegee – not accepted
  Euphorbia eleanoriae (Lorence & W.L. Wagner) Govaerts – accepted – Na Pali sandmat
  Euphorbia elegans Spreng. – accepted
  Euphorbia elegans var. laxa Boiss. – not accepted
  Euphorbia elegantissima P.R.O. Bally & S. Carter – accepted
  Euphorbia ellenbeckii Pax – accepted
  Euphorbia elliotii Leandri – accepted
  Euphorbia ellipsifolia Gilli – accepted
  Euphorbia elliptica Lam. – accepted
  Euphorbia elliptica Thunb. – not accepted
  Euphorbia elodes Boiss. – accepted
  Euphorbia elodes var. minor Boiss. – not accepted
  Euphorbia elongata Poir. – not accepted
  Euphorbia elquiensis Phil. – accepted
  Euphorbia elwendica Stapf – not accepted
  Euphorbia elymaitica Bornm. – accepted
  Euphorbia emarginata Lam. – not accepted
  Euphorbia emarginata Aiton – not accepted
  Euphorbia emarginata (Klotzsch & Garcke) Boiss. – not accepted
  Euphorbia emirnensis Baker – accepted
  Euphorbia emodi Hook. f. – not accepted
  Euphorbia enalla Brandegee – not accepted
  Euphorbia engelmannii Boiss. – accepted
  Euphorbia engelmannii var. depressa Boiss. – not accepted
  Euphorbia engleri Pax – accepted
  Euphorbia engleriana Dinter – accepted
  Euphorbia enneagona Haw. – not accepted
  Euphorbia enormis N.E. Br. – accepted
  Euphorbia ensifolia Baker – accepted
  Euphorbia enterophora Drake – accepted
  Euphorbia enterophora ssp. crassa Cremers – accepted
  Euphorbia enterophora ssp. enterophora Drake – accepted
  Euphorbia ephedroides E. Mey. ex Boiss. – accepted
  Euphorbia ephedroides var. debilis L.C. Leach – accepted
  Euphorbia ephedroides var. ephedroides E. Mey. ex Boiss. – accepted
  Euphorbia ephedroides var. imminuta L.C. Leach & G. Will. – accepted
  Euphorbia ephedromorpha Bartlett ex B.L. Rob. & Bartlett – accepted
  Euphorbia epicyparissias (E. Mey. ex Klotzsch & Garcke) Boiss. – accepted
  Euphorbia epicyparissias E. Mey. ex Klotzsch & Garcke – not accepted
  Euphorbia epilobiifolia W.T. Wang – not accepted
  Euphorbia epiphylloides Kurz – accepted
  Euphorbia epithymoides L. – accepted – cushion spurge
  Euphorbia epithymoides f. glabrescens Rostanski – not accepted
  Euphorbia epithymoides ssp. lingulata (Heuff.) Nyman – not accepted
  Euphorbia epithymoides var. polychroma (A. Kern.) Nyman – not accepted
  Euphorbia epithymoides var. samnitica Fiori – not accepted
  Euphorbia epithymoides var. verrucosa Fiori – not accepted
  Euphorbia equisetiformis A. Stewart – accepted
  Euphorbia eranthes R.A. Dyer & Milne-Redh. – accepted
  Euphorbia eremica Jeps. – not accepted
  Euphorbia eremocarpus Pharm. ex Wehmer – not accepted
  Euphorbia eremophila A. Cunn. ex Hook. – not accepted
  Euphorbia eremophila var. dracunculina Baill. – not accepted
  Euphorbia eremophila var. filiformis Baill. – not accepted
  Euphorbia eremophila var. genuina Baill. – not accepted
  Euphorbia eremophila var. latifolia Boiss. – not accepted
  Euphorbia eremophila var. microdendron Baill. – not accepted
  Euphorbia eremophila var. oblonga Domin – not accepted
  Euphorbia eremophila var. phyllanthina Baill. – not accepted
  Euphorbia eremophila var. typica Domin – not accepted
  Euphorbia eriantha Benth. – accepted – beetle spurge, Mexican poinsettia
  Euphorbia ericetorum Zumagl. – not accepted
  Euphorbia ericifolia Pax – not accepted
  Euphorbia ericoides Lam. – accepted
  Euphorbia erigavensis S. Carter – accepted
  Euphorbia erinacea Boiss. & Kotschy – accepted
  Euphorbia eriocarpa Bertol. – not accepted
  Euphorbia erioclada Boiss. & Heldr. – not accepted
  Euphorbia eriogonoides Small – not accepted
  Euphorbia eriophora Boiss. – accepted
  Euphorbia eriophylla Kar. & Kir. – not accepted
  Euphorbia erlangeri Pax – accepted
  Euphorbia erosa Willd. – not accepted
  Euphorbia erubescens Boiss. – accepted
  Euphorbia erubescens E. Mey. ex Boiss. – not accepted
  Euphorbia erythradenia Boiss. – accepted
  Euphorbia erythradenia var. obovata Boiss. – not accepted
  Euphorbia erythraea Hemsl. – not accepted
  Euphorbia erythraeae (Berger) N.E. Br. – not accepted
  Euphorbia erythrantha F. Muell. – not accepted
  Euphorbia erythrina Link – accepted
  Euphorbia erythrina var. burchellii Boiss. – not accepted
  Euphorbia erythrocephala P.R.O. Bally & Milne-Redh. – accepted
  Euphorbia erythroclada Boiss. – accepted – Dhudheri
  Euphorbia erythrocoma H. Lév. – not accepted
  Euphorbia erythrocucullata Mangelsdorff – accepted
  Euphorbia erythrodon Boiss. & Heldr. – accepted
  Euphorbia erythrophylla Bertol. – not accepted
  Euphorbia erythrorrhiza (Klotzsch & Garcke) Boiss. – not accepted
  Euphorbia erythrosperma A. Kern. – not accepted
  Euphorbia erythroxyloides Baker – accepted
  Euphorbia esculenta Marloth – accepted
  Euphorbia espinosa Pax – accepted
  Euphorbia espirituensis M.E. Jones – not accepted
  Euphorbia esquirolii H. Lév. & Vaniot – not accepted
  Euphorbia estevesii N. Zimm. & P.J. Braun – accepted
  Euphorbia esula L. – accepted – spurge, wolf's milk, wolf's-milk, leafy spurge
  Euphorbia esula f. esulifolia (Thell.) Kuzmanov – not accepted
  Euphorbia esula ssp. aragonensis Nyman – not accepted
  Euphorbia esula ssp. chankoana (Vorosch.) Vorosch. – not accepted
  Euphorbia esula ssp. esula L. – accepted
  Euphorbia esula ssp. maglicensis (Rohlena) Hayek – accepted
  Euphorbia esula ssp. nevadensis (Boiss. & Reut.) Malag. – not accepted
  Euphorbia esula ssp. orientalis (Boiss.) Molero & Rovira – not accepted
  Euphorbia esula ssp. paradoxa (Schur) Simonk. – not accepted
  Euphorbia esula ssp. pseudocyparissias (Jord.) Nyman – not accepted
  Euphorbia esula ssp. saratoi (Ardoino) P. Fourn. – not accepted
  Euphorbia esula ssp. tommasiniana (Bertol.) Kuzmanov – accepted
  Euphorbia esula ssp. tristis (Besser) Rouy – not accepted
  Euphorbia esula var. acutifolia Lange – not accepted
  Euphorbia esula var. ararica (Jord.) Nyman – not accepted
  Euphorbia esula var. cyparissioides Boiss. – accepted
  Euphorbia esula var. esula L. – accepted – spurge, wolf's milk, wolf's-milk, leafy spurge
  Euphorbia esula var. genuina Boiss. – not accepted
  Euphorbia esula var. gracilis Nyman – not accepted
  Euphorbia esula var. latifolia (C.A. Mey. ex Ledeb.) Ledeb. – not accepted
  Euphorbia esula var. mosana (Lej.) Boiss. – not accepted
  Euphorbia esula var. orientalis (Boiss.) Kuzmanov – not accepted – leafy spurge, spurge, oriental wolf's milk
  Euphorbia esula var. paradoxa Schur – not accepted
  Euphorbia esula var. pinifolia Boiss. – not accepted
  Euphorbia esula var. pseudotenuifolia Sennen – not accepted
  Euphorbia esula var. riparia (Jord.) Schur – not accepted
  Euphorbia esula var. taurica Besser – not accepted
  Euphorbia esula var. triumfetti (Bertol.) Nyman – not accepted
  Euphorbia esula var. uralensis (Fisch. ex Link) Dorn – not accepted – Russian leafy spurge, leafy spurge, spurge, wolf's milk
  Euphorbia esuliformis S. Schauer ex Nees & S. Schauer – accepted
  Euphorbia esuliformis var. subdentata Engelm. – not accepted
  Euphorbia esuloides (DC.) Ten. – not accepted
  Euphorbia esuloides Velen. ex Nyman – not accepted
  Euphorbia etuberculosa P.R.O. Bally & S. Carter – accepted
  Euphorbia euboea Halácsy – not accepted
  Euphorbia eugeniae Prokh. – accepted
  Euphorbia eumyrmodes Baker ex Denis – not accepted
  Euphorbia euonymoclada Croizat – accepted
  Euphorbia euryops Bullock – not accepted
  Euphorbia evansii Pax – accepted
  Euphorbia evonymicarpa Chodat & Hassl. – not accepted
  Euphorbia excelsa A.C. White, R.A. Dyer & B. Sloane – accepted
  Euphorbia exclusa S. Watson – not accepted
  Euphorbia exigua L. – accepted – dwarf spurge, ésula meno, hierbecilla traidora, small spurge
  Euphorbia exigua ssp. exigua L. – accepted
  Euphorbia exigua ssp. merinoi M. Laínz – accepted
  Euphorbia exigua subvar. tricuspidata (Lapeyr.) Nyman – not accepted
  Euphorbia exigua var. acuta L. – not accepted
  Euphorbia exigua var. melillensis Sennen – not accepted
  Euphorbia exigua var. pycnophylla K.U. Kramer & Westra – not accepted
  Euphorbia exigua var. retusa L. – not accepted
  Euphorbia exigua var. tricuspidata (Lapeyr.) W. Koch – not accepted
  Euphorbia exigua var. truncata W. Koch – not accepted
  Euphorbia exilis L.C. Leach – accepted
  Euphorbia exilispina S. Carter – accepted
  Euphorbia expansa Janka – not accepted
  Euphorbia exserta (Small) Coker – accepted – coastal sand spurge
  Euphorbia exstipulata Engelm. – accepted – squareseed spurge, square-seed spurge, Clark Mountain spurge
  Euphorbia exstipulata var. exstipulata Engelm. – not accepted – squareseed spurge, Clark Mountain spurge
  Euphorbia exstipulata var. lata Warnock & M.C. Johnst. – not accepted – squareseed spurge
  Euphorbia exumensis (Millsp.) Correll – not accepted
  Euphorbia eyassiana P.R.O. Bally & S. Carter – accepted
  Euphorbia eylesii Rendle – accepted
  Euphorbia falcata L. – accepted – sickle spurge
  Euphorbia falcata f. rubra (Cav.) Nikolic – not accepted
  Euphorbia falcata ssp. falcata L. – accepted
  Euphorbia falcata ssp. macrostegia (Bornm.) O. Schwarz – accepted
  Euphorbia falcata ssp. rubra (Cav.) Mateo & Figuerola – not accepted
  Euphorbia falcata var. acuminata (Lam.) St.-Amans – not accepted
  Euphorbia falcata var. croizatii Sennen & Mauricio – not accepted
  Euphorbia falcata var. ecornuta Boiss. – not accepted
  Euphorbia falcata var. falcata L. – accepted
  Euphorbia falcata var. falciformis Griseb. – not accepted
  Euphorbia falcata var. galilaea (Boiss.) Boiss. – accepted
  Euphorbia falcata var. genuina Maire – not accepted
  Euphorbia falcata var. latifolia Font Quer – not accepted
  Euphorbia falcata var. macrostegia Bornm. – not accepted
  Euphorbia falcata var. maroccana Murb. – not accepted
  Euphorbia falcata var. minor W. Koch – not accepted
  Euphorbia falcata var. obscura (Loisel.) Nyman – not accepted
  Euphorbia falcata var. peploiforme Sennen – not accepted
  Euphorbia falcata var. rubra (Cav.) Boiss. – not accepted
  Euphorbia fallax Hagenb. – not accepted
  Euphorbia fallax Deysson – not accepted
  Euphorbia falsa N.E. Br. – not accepted
  Euphorbia famatamboay F. Friedmann & Cremers – accepted
  Euphorbia famatamboay ssp. famatamboay F. Friedmann & Cremers – accepted
  Euphorbia famatamboay ssp. itampolensis F. Friedmann & Cremers – accepted
  Euphorbia fanshawei L.C. Leach – accepted
  Euphorbia fascicaulis S. Carter – accepted
  Euphorbia fasciculata Thunb. – accepted
  Euphorbia fastuosa Sessé & Moç. – not accepted
  Euphorbia faucicola L.C. Leach – accepted
  Euphorbia fauriei H. Lév. & Vaniot – accepted
  Euphorbia faurotii Franch. – not accepted
  Euphorbia feddemae McVaugh – accepted
  Euphorbia fendleri Torr. & A. Gray – accepted – Fendler's sandmat
  Euphorbia fendleri var. chaetocalyx Boiss. – not accepted
  Euphorbia fendleri var. dissimilis Payson – not accepted
  Euphorbia fendleri var. triligulata L.C. Wheeler – not accepted
  Euphorbia fendleri var. typica L.C. Wheeler – not accepted
  Euphorbia ferdinandii Baill. – not accepted
  Euphorbia ferdowsiana Pahlevani – accepted
  Euphorbia ferganensis B. Fedtsch. – accepted
  Euphorbia ferox Marloth – accepted
  Euphorbia festiva Sherff – not accepted
  Euphorbia fianarantsoae Ursch & Leandri – accepted
  Euphorbia fidjiana Boiss. – not accepted
  Euphorbia fieldii Sirj. – not accepted
  Euphorbia fiha Decary – not accepted
  Euphorbia fiherenensis Poiss. – accepted
  Euphorbia filicaulis Urb. – not accepted
  Euphorbia filicina Port. – accepted
  Euphorbia filicina var. alpina Boiss. – not accepted
  Euphorbia filicina var. montana Boiss. – not accepted
  Euphorbia filiflora Marloth – accepted
  Euphorbia filiflora var. nana G. Will. – not accepted
  Euphorbia filiformis (P.R.O. Bally) Bruyns – accepted
  Euphorbia filipes Benth. – not accepted
  Euphorbia fimbriata Scop. – not accepted
  Euphorbia fimbriata B. Heyne ex Roth – not accepted
  Euphorbia fimbriata Wall. ex Boiss. – not accepted
  Euphorbia fimbriata Boiss. – not accepted
  Euphorbia fimbriata var. laxa Boiss. – not accepted
  Euphorbia fimbrilligera Mart. – not accepted
  Euphorbia finkii (Boiss.) V.W. Steinm. – accepted
  Euphorbia finlaysonii J.M. Black – not accepted
  Euphorbia firma Ledeb. – not accepted
  Euphorbia fischeri Pax – accepted
  Euphorbia fischeriana Steud. – accepted
  Euphorbia fischeriana f. glaberrima (Maxim.) Oudejans – not accepted
  Euphorbia fischeriana f. pilosa (Regel) Oudejans – not accepted
  Euphorbia fischeriana var. komaroviana (Prokh.) G.L. Chu – not accepted
  Euphorbia fissispina P.R.O. Bally & S. Carter – accepted
  Euphorbia fistulosa M.S. Khan – accepted
  Euphorbia flabellaris Anderson ex Boiss. – not accepted
  Euphorbia flagelliformis (Engelm.) Engelm. – not accepted
  Euphorbia flamandii Batt. – not accepted
  Euphorbia flanaganii N.E. Br. – accepted
  Euphorbia flaviana Carn.-Torres & Cordeiro – accepted
  Euphorbia flavicoma DC. – accepted
  Euphorbia flavicoma ssp. bermejense Hidalgo-Triana, Pérez Lat. & Cabezudo – accepted
  Euphorbia flavicoma ssp. brittingeri (Opiz ex Samp.) O. Bolňs & Vigo – not accepted
  Euphorbia flavicoma ssp. costeana (Rouy) Vindt & Guin. ex Greuter & Burdet – accepted
  Euphorbia flavicoma ssp. flavicoma DC. – accepted
  Euphorbia flavicoma ssp. giselae Simon Pall. – accepted
  Euphorbia flavicoma ssp. mariolensis (Rouy) O. Bolňs & Vigo – not accepted
  Euphorbia flavicoma ssp. occidentalis M. Laínz – accepted
  Euphorbia flavicoma ssp. polygalifolia (Boiss. & Reut.) O. Bolňs & Vigo – not accepted
  Euphorbia flavicoma ssp. verrucosa (L.) Breistr. – not accepted
  Euphorbia flavicoma ssp. verrucosa (Fiori) Pignatti – not accepted
  Euphorbia flavicoma var. ruscinonensis (Boiss.) O. Bolňs & Vigo – not accepted
  Euphorbia flavicoma var. velutina (Boiss.) Breistr. – not accepted
  Euphorbia flavopurpurea Willk. – not accepted
  Euphorbia fleurotii Jord. – not accepted
  Euphorbia flexicaulis Scheele – not accepted
  Euphorbia flexuosa Kunth – not accepted
  Euphorbia flindersica Halford & W.K. Harris – accepted
  Euphorbia floccosiuscula M.E. Jones – not accepted
  Euphorbia floresii Standl. – not accepted
  Euphorbia floribunda Engelm. ex Boiss. – accepted
  Euphorbia florida Engelm. – accepted – Chiricahua Mountain sandmat
  Euphorbia floridana Chapm. – accepted – Greater Florida spurge
  Euphorbia fluminis S. Carter – accepted
  Euphorbia fodhliana Deflers – not accepted
  Euphorbia foetida Kit. – not accepted
  Euphorbia foetida Schult. ex Rchb. – not accepted
  Euphorbia foetida Hoppe ex W.D.J. Koch – not accepted
  Euphorbia foliata Buch.-Ham. ex Dillwyn – not accepted
  Euphorbia foliiflua Ule – not accepted
  Euphorbia foliolosa Boiss. – accepted
  Euphorbia foliosa (Klotzsch & Garcke) N.E. Br. – accepted
  Euphorbia fontanesii Steud. – not accepted
  Euphorbia fontqueriana Greuter – accepted
  Euphorbia forbesii Sherff – not accepted
  Euphorbia formosana Hayata – not accepted
  Euphorbia forolensis L.E. Newton – accepted
  Euphorbia forskalii var. glabrata J. Gay – not accepted
  Euphorbia forsskalii J. Gay – accepted
  Euphorbia fortissima L.C. Leach – accepted
  Euphorbia fortuita A.C. White, R.A. Dyer & B. Sloane – accepted
  Euphorbia fosbergii (J. Florence) Govaerts – accepted
  Euphorbia fossulata Boiss. & Gaill. – not accepted
  Euphorbia fournieri Leandri – not accepted
  Euphorbia fournieri Rebut – not accepted
  Euphorbia fractiflexa S. Carter & J.R.I. Wood – accepted
  Euphorbia fragifera Jan – accepted
  Euphorbia fragifera Schur – not accepted
  Euphorbia fragifera var. inermis Nyman – not accepted
  Euphorbia fragiliramulosa L.C. Leach – not accepted
  Euphorbia fragilis Decne. – not accepted
  Euphorbia francescae L.C. Leach – not accepted
  Euphorbia franchetii B. Fedtsch. – accepted
  Euphorbia franckiana A. Berger – accepted
  Euphorbia francoana Boiss. – accepted
  Euphorbia francoisii Leandri – accepted
  Euphorbia francoisii var. crassicaulis Rauh – accepted
  Euphorbia francoisii var. francoisii Leandri – accepted
  Euphorbia francoisii var. rakotozafyi Cremers – not accepted
  Euphorbia frangulifolia Kunth – not accepted
  Euphorbia frankii Lavranos – accepted
  Euphorbia fraseri Boiss. – accepted
  Euphorbia fraterna N.E. Br. – not accepted
  Euphorbia frickiana N.E. Br. – not accepted
  Euphorbia friedrichiae Dinter – accepted
  Euphorbia friesii (N.E. Br.) Bruyns – accepted
  Euphorbia friesiorum (Hassl.) S. Carter – accepted
  Euphorbia frivaldszkyana Dörfl. & Degen ex Halácsy – not accepted
  Euphorbia froedinii Rech. f. – not accepted
  Euphorbia fructus-pini Mill. – not accepted
  Euphorbia frutescens N.E. Br. – not accepted
  Euphorbia fruticosa Forssk. – accepted – Shurur
  Euphorbia fruticosa Biv. – not accepted
  Euphorbia fruticosa Edgew. – not accepted
  Euphorbia fruticulosa Engelm. ex Boiss. – accepted
  Euphorbia fruticulosa var. fruticulosa Engelm. ex Boiss. – accepted
  Euphorbia fruticulosa var. hirtella M.C. Johnst. – accepted
  Euphorbia fuentesii V.W. Steinm. – accepted
  Euphorbia fuhsii Bornm. & Sint. ex Prokh. – not accepted
  Euphorbia fulgens Karw. ex Klotzsch – accepted – scarlet-plume
  Euphorbia fulva Stapf – not accepted
  Euphorbia furcata N.E. Br. – accepted
  Euphorbia furcatifolia M.G. Gilbert – accepted
  Euphorbia furcillata Kunth – accepted
  Euphorbia furcillata var. ribana M.C. Johnst. – not accepted
  Euphorbia fusca Marloth – not accepted
  Euphorbia fuscolanata Gilli – accepted
  Euphorbia fusiformis Buch.-Ham. ex D. Don – accepted
  Euphorbia fusiformis var. fusiformis Buch.-Ham. ex D. Don – accepted
  Euphorbia fusiformis var. khandallensis (Blatt. & Hallb.) Binojk. & N.P. Balakr. – accepted
  Euphorbia fwambensis (N.E. Br.) Bruyns – accepted
  Euphorbia gaditana Coss. – accepted
  Euphorbia gaillardotii Boiss. & Blanche – accepted
  Euphorbia galapageia B.L. Rob. & Greenm. – accepted
  Euphorbia galgalana S. Carter – accepted
  Euphorbia galiciana McVaugh – not accepted
  Euphorbia galilaea Boiss. – not accepted
  Euphorbia galioides Boiss. – not accepted
  Euphorbia galpinii Pax – not accepted
  Euphorbia gammaranoi G. Will. – accepted
  Euphorbia garanbiensis Hayata – accepted
  Euphorbia garberi Engelm. ex Chapm. – accepted – Garber's spurge, Garber's sandmat
  Euphorbia garheana Boiss. – not accepted
  Euphorbia gariepina Boiss. – accepted
  Euphorbia gariepina ssp. balsamea (Welw. ex Hiern) L.C. Leach – accepted
  Euphorbia gariepina ssp. gariepina Boiss. – accepted
  Euphorbia garkeana Boiss. – not accepted
  Euphorbia garrullae Sennen – not accepted
  Euphorbia garuana N.E. Br. – accepted
  Euphorbia gasparrinii Boiss. – accepted
  Euphorbia gasparrinii ssp. gasparrinii Boiss. – accepted
  Euphorbia gasparrinii ssp. samnitica (Fiori) Pignatti – accepted
  Euphorbia gaubae var. velutina (Bornm. & Gauba) Oudejans – not accepted
  Euphorbia gaudichaudii Boiss. – accepted – spurge
  Euphorbia gaumeri Millsp. – not accepted
  Euphorbia gayi Salis – accepted
  Euphorbia gayi var. balearica Willk. – not accepted
  Euphorbia geayi Costantin & Gallaud – not accepted
  Euphorbia gebelica Brullo – accepted
  Euphorbia gedrosiaca Rech. f., Aellen & Esfand. – accepted
  Euphorbia geldorensis S. Carter – accepted
  Euphorbia gemella Lag. – not accepted
  Euphorbia geminata (Aiton) Marloth ex A.C. White, R.A. Dyer & B. Sloane – not accepted
  Euphorbia geminiloba Millsp. – not accepted
  Euphorbia gemmea P.R.O. Bally & S. Carter – accepted
  Euphorbia geniculata Ortega – not accepted
  Euphorbia genistoides P.J. Bergius – accepted
  Euphorbia genistoides var. corifolia (Lam.) N.E. Br. – accepted
  Euphorbia genistoides var. genistoides P.J. Bergius – accepted
  Euphorbia genistoides var. leiocarpa Boiss. – accepted
  Euphorbia genistoides var. major Boiss. – accepted
  Euphorbia genoudiana Ursch & Leandri – accepted
  Euphorbia gentilis N.E. Br. – accepted
  Euphorbia gentilis ssp. gentilis N.E. Br. – accepted
  Euphorbia gentilis ssp. tanquana L.C. Leach – accepted
  Euphorbia gentryi V.W. Steinm. & T.F. Daniel – accepted
  Euphorbia georgei Oudejans – not accepted – pointed sandmat
  Euphorbia georgiana Mayfield – accepted
  Euphorbia gerardiana Jacq. – not accepted
  Euphorbia gerardiana ssp. loiseleurii Rouy – not accepted
  Euphorbia gerardiana ssp. saxicola Velen. – not accepted
  Euphorbia gerardiana var. arenivaga Martrin-Donos – not accepted
  Euphorbia gerardiana var. dentata Chabert – not accepted
  Euphorbia gerardiana var. firma (Ledeb.) Boiss. – not accepted
  Euphorbia gerardiana var. hohenackeri Boiss. – not accepted
  Euphorbia gerardiana var. homophylla (Lange ex Schrank) Nyman – not accepted
  Euphorbia gerardiana var. intermedia Savul. – not accepted
  Euphorbia gerardiana var. lanceolata Cariot – not accepted
  Euphorbia gerardiana var. latifolia J.J. Schmitz & Regel – not accepted
  Euphorbia gerardiana var. minor Duby – not accepted
  Euphorbia gerardiana var. sturii Holuby – not accepted
  Euphorbia germainii Phil. – accepted
  Euphorbia geroldii Rauh – accepted
  Euphorbia gerstneriana Bruyns – accepted
  Euphorbia geyeri Engelm. – accepted – Geyer's sandmat, Geyer's spurge
  Euphorbia geyeri var. geyeri Engelm. – accepted – Geyer's sandmat, Geyer's spurge
  Euphorbia geyeri var. microsperma A. Gray – not accepted
  Euphorbia geyeri var. wheeleriana Warnock & M.C. Johnst. – accepted – Geyer's sandmat
  Euphorbia gibelliana Peola – not accepted
  Euphorbia gibraltarica Wolley-Dod – not accepted
  Euphorbia giessii L.C. Leach – accepted
  Euphorbia gilbertiana Bisseret & Specks – accepted
  Euphorbia gilbertii A. Berger – not accepted
  Euphorbia gillettii P.R.O. Bally & S. Carter – accepted
  Euphorbia gillettii ssp. gillettii P.R.O. Bally & S. Carter – accepted
  Euphorbia gillettii ssp. tenuior S. Carter – accepted
  Euphorbia giumboensis A. Hässl. – accepted
  Euphorbia glaberrima K. Koch – accepted
  Euphorbia glaberrima Klotzsch – not accepted
  Euphorbia glabrata Sw. – not accepted
  Euphorbia glabriflora Vis. – accepted
  Euphorbia gladiata (P.R.O. Bally) Bruyns – accepted
  Euphorbia gladiosa M.E. Jones – not accepted
  Euphorbia glanduligera Pax – accepted
  Euphorbia glareosa Pall. ex M. Bieb. – accepted
  Euphorbia glareosa ssp. maleevii (Tamamsch.) Tamamsch. – not accepted
  Euphorbia glareosa var. lasiocarpa Boiss. – not accepted
  Euphorbia glareosa var. pannonica (Host) Nyman – not accepted
  Euphorbia glareosa var. varnensis Velen. – not accepted
  Euphorbia glauca G. Forst. – accepted
  Euphorbia glauca Steud. – not accepted
  Euphorbia glauca Roxb. – not accepted
  Euphorbia glaucella Pax – not accepted
  Euphorbia glaucophylla Poir. – accepted
  Euphorbia glaucopoda Diels – not accepted
  Euphorbia glebulosa Coss. & Durieu – not accepted
  Euphorbia glebulosa ssp. intermedia Maire – not accepted
  Euphorbia glebulosa var. almeriensis Lange – not accepted
  Euphorbia glebulosa var. peplidea Boiss. – not accepted
  Euphorbia globosa (Haw.) Sims – accepted
  Euphorbia globulicaulis S. Carter – accepted
  Euphorbia globulifera Kunth – not accepted
  Euphorbia globulosa Boiss. – not accepted
  Euphorbia glochidiata Pax – accepted
  Euphorbia glomerifera (Millsp.) L.C. Wheeler – not accepted
  Euphorbia glomerulans (Prokh.) Prokh. – accepted
  Euphorbia glyptosperma Engelm. – accepted – ridgeseed spurge, ribseed sandmat
  Euphorbia glyptosperma var. pubescens Boiss. – not accepted
  Euphorbia glyptosperma var. tenerrima Engelm. – not accepted
  Euphorbia gmelinii Steud. – accepted
  Euphorbia godana Buddens., Lawant & Lavranos – accepted
  Euphorbia goeringii Steud. ex Boiss. – not accepted
  Euphorbia goetzei Pax – accepted
  Euphorbia gokakensis S.R. Yadav, Malpure & Chandore – accepted
  Euphorbia goldei Prokh. – not accepted
  Euphorbia goliana Comm. ex Lam. – accepted
  Euphorbia golisana N.E. Br. – not accepted
  Euphorbia gollmeriana Klotzsch ex Boiss. – accepted
  Euphorbia golondrina L.C. Wheeler – accepted – Boquillas sandmat, canyon spurge, swallow spurge
  Euphorbia gorinii Chiov. – not accepted
  Euphorbia gossweileri Pax – not accepted
  Euphorbia gossypina Pax – accepted
  Euphorbia gossypina ssp. gossypina Pax – accepted
  Euphorbia gossypina ssp. mangulensis S. Carter – accepted
  Euphorbia gossypina var. coccinea Pax – accepted
  Euphorbia gossypina var. gossypina Pax – accepted
  Euphorbia gottlebei Rauh – accepted
  Euphorbia goudotii Boiss. – not accepted
  Euphorbia goyazensis Boiss. – accepted
  Euphorbia gracilicaulis L.C. Leach – accepted
  Euphorbia gracilior Cronquist – not accepted
  Euphorbia gracilipes Baill. – not accepted
  Euphorbia graciliramea Pax – accepted
  Euphorbia gracilis Elliott – not accepted
  Euphorbia gracilis Loisel. – not accepted
  Euphorbia gracilis Besser ex M. Bieb. – not accepted
  Euphorbia gracilis var. rotundifolia A. Wood – not accepted
  Euphorbia gracillima S. Watson – accepted – Mexican sandmat
  Euphorbia gradyi V.W. Steinm. & Ram.-Roa – accepted
  Euphorbia graeca Boiss. & Spruner – not accepted
  Euphorbia graeca ssp. dalmatica (Vis.) Nyman – not accepted
  Euphorbia graeca var. brachyceras Candargy – not accepted
  Euphorbia graminea Jacq. – accepted – grassleaf spurge
  Euphorbia graminea Schltdl. & Cham. – not accepted
  Euphorbia graminea f. foliosa McVaugh – accepted
  Euphorbia graminea var. acutifolia Boiss. – not accepted
  Euphorbia graminea var. graminea Jacq. – accepted
  Euphorbia graminea var. lancifolia Millsp. – not accepted
  Euphorbia graminea var. novogaliciana McVaugh – accepted
  Euphorbia graminea var. pedunculosa (A. Rich.) Boiss. – not accepted
  Euphorbia graminea var. picta (Jacq.) Boiss. – not accepted
  Euphorbia graminea var. subsinuata (Klotzsch & Garcke) Boiss. – not accepted
  Euphorbia graminea var. virgata Millsp. – not accepted
  Euphorbia graminifolia Michx. – not accepted
  Euphorbia graminifolia Vill. – accepted
  Euphorbia graminifolia ssp. tommasiniana (Bertol.) Oudejans – not accepted
  Euphorbia graminifolia ssp. zhiguliensis (Prokh.) Oudejans – not accepted
  Euphorbia grammata (McVaugh) Oudejans – accepted
  Euphorbia grandialata R.A. Dyer – accepted
  Euphorbia grandicornis Goebel ex N.E. Br. – accepted
  Euphorbia grandicornis ssp. grandicornis Goebel ex N.E. Br. – accepted
  Euphorbia grandicornis ssp. sejuncta L.C. Leach – accepted
  Euphorbia grandidens Haw. – accepted
  Euphorbia grandidieri Baill. – accepted
  Euphorbia grandifolia Haw. – accepted
  Euphorbia grandis Lem. – not accepted
  Euphorbia graniticola L.C. Leach – accepted
  Euphorbia grantii Oliv. – accepted
  Euphorbia grantii var. friesiorum Hassl. – not accepted
  Euphorbia granulata Forssk. – accepted
  Euphorbia granulata var. decumbens Forssk. – not accepted
  Euphorbia granulata var. dentata N.E. Br. – not accepted
  Euphorbia granulata var. glaberrima Boiss. – not accepted
  Euphorbia granulata var. glabra Maire – not accepted
  Euphorbia granulata var. granulata Forssk. – accepted
  Euphorbia granulata var. turcomanica (Boiss.) Hadidi – accepted
  Euphorbia graveolens N.E. Br. – not accepted
  Euphorbia greenei Millsp. – not accepted
  Euphorbia greenwayi P.R.O. Bally & S. Carter – accepted
  Euphorbia greenwayi ssp. breviaculeata S. Carter – accepted
  Euphorbia greenwayi ssp. greenwayi P.R.O. Bally & S. Carter – accepted
  Euphorbia gregaria Marloth – accepted
  Euphorbia gregersenii K. Malý ex Beck – accepted
  Euphorbia greggii Engelm. ex Boiss. – accepted
  Euphorbia greuteri N. Kilian, Kürschner & P. Hein – accepted
  Euphorbia griffithii Hook. f. – accepted
  Euphorbia griffithii var. bhutanica (Fisch.) D.G. Long – accepted
  Euphorbia griffithii var. griffithii Hook. f. – accepted
  Euphorbia grisea Engelm. ex Boiss. – not accepted
  Euphorbia griseola Pax – accepted
  Euphorbia griseola ssp. griseola Pax – accepted
  Euphorbia griseola ssp. mashonica L.C. Leach – accepted
  Euphorbia griseola ssp. zambiensis L.C. Leach – accepted
  Euphorbia grisophylla M.S. Khan – accepted
  Euphorbia groenewaldii R.A. Dyer – accepted
  Euphorbia grosseri Pax – accepted
  Euphorbia grossheimii (Prokh.) Prokh. – accepted
  Euphorbia guachanca Haenke – accepted
  Euphorbia guadalajarana S. Watson – accepted
  Euphorbia guadalupensis J.T. Howell – not accepted
  Euphorbia guanarensis Pittier – accepted
  Euphorbia guaraniorum P. Carrillo & V.W. Steinm. – accepted
  Euphorbia guatemalensis Standl. & Steyerm. – accepted
  Euphorbia gueinzii Boiss. – accepted
  Euphorbia guentheri (Pax) Bruyns – accepted
  Euphorbia guerichiana Pax – accepted
  Euphorbia guestii Blakelock – not accepted
  Euphorbia guiengola W.R. Buck & Huft – accepted
  Euphorbia guilielmii A. Gray – not accepted
  Euphorbia guillauminiana Boiteau – accepted
  Euphorbia guillemetii Ursch & Leandri – not accepted
  Euphorbia gulestanica Podlech – accepted
  Euphorbia gumaroi J. Meyrán – accepted
  Euphorbia gummifera Boiss. – accepted
  Euphorbia gundlachii Urb. – not accepted
  Euphorbia guntensis (Prokh.) Prokh. – accepted
  Euphorbia gussoneana Lojac. – not accepted
  Euphorbia guyoniana Boiss. & Reut. – accepted
  Euphorbia gymnadenia Urb. – not accepted
  Euphorbia gymnocalycioides M.G. Gilbert & S. Carter – accepted
  Euphorbia gymnoclada Boiss. – accepted
  Euphorbia gymnoclada Engelm. – not accepted
  Euphorbia gymnonota Urb. – accepted
  Euphorbia gynophora Pax – not accepted
  Euphorbia gypsicola Rech. f. & Aellen – accepted
  Euphorbia gypsophila S. Carter – accepted
  Euphorbia hadramautica Baker – accepted
  Euphorbia haeleeleana D.R. Herbst – accepted – Kauai spurge, `akoko
  Euphorbia haematantha Boiss. – accepted
  Euphorbia haematodes Boiss. – not accepted
  Euphorbia haevermansii X. Aubriot & Lowry – accepted
  Euphorbia hainanensis Croizat – accepted
  Euphorbia hajhirensis Radcl.-Sm. – accepted
  Euphorbia hakutosanensis Hurus. – accepted
  Euphorbia halacsyi Formánek – not accepted
  Euphorbia halemanui Sherff – accepted – Kauai sandmat
  Euphorbia halipedicola L.C. Leach – accepted
  Euphorbia halleri Dinter – not accepted
  Euphorbia hallii R.A. Dyer – accepted
  Euphorbia halophila Miq. – not accepted
  Euphorbia halophila Bornm. & Gauba – not accepted
  Euphorbia halophila var. velutina Bornm. & Gauba – not accepted
  Euphorbia hamaderoensis A.G. Mill. – accepted – Gisso, Jissoh
  Euphorbia hamata (Haw.) Sweet – accepted
  Euphorbia hamiltonii Oudejans – not accepted
  Euphorbia handeniensis S. Carter – accepted
  Euphorbia handiensis Burchard – accepted
  Euphorbia harmandii Gagnep. – not accepted
  Euphorbia hartwegiana Boiss. – not accepted
  Euphorbia hassleriana Chodat – not accepted
  Euphorbia hastisquama N.E. Br. – not accepted
  Euphorbia haussknechtii Boiss. – accepted
  Euphorbia havanensis Willd. ex Boiss. – not accepted
  Euphorbia hebecarpa Boiss. – accepted
  Euphorbia hebegyne Pax & K. Hoffm. ex Emrich – not accepted
  Euphorbia hedigeriana (Malaisse) Bruyns – accepted
  Euphorbia hedyotoides N.E. Br. – accepted
  Euphorbia heishuiensis W.T. Wang – accepted
  Euphorbia heldreichii Orph. ex Boiss. – accepted
  Euphorbia heldreichii var. roeseri Boiss. – not accepted
  Euphorbia helenae Urb. – accepted
  Euphorbia helenae ssp. grandifolia Borhidi & O. Muńiz – accepted
  Euphorbia helenae ssp. helenae Urb. – accepted
  Euphorbia heleniana Thell. & Stapf – accepted
  Euphorbia helicothele Lem. – not accepted
  Euphorbia helioscopia L. – accepted – madwoman's milk, summer spurge, sun spurge, wartweed
  Euphorbia helioscopia f. litoralis (Hurus.) Oudejans – not accepted
  Euphorbia helioscopia f. major (Mutel) Oudejans – not accepted
  Euphorbia helioscopia ssp. dominii (Röhl.) K. Malý – not accepted
  Euphorbia helioscopia ssp. helioscopia L. – accepted
  Euphorbia helioscopia ssp. helioscopioides (Loscos & Pardo) Nyman – accepted
  Euphorbia helioscopia ssp. hiemalis A.P. Khokhr. – accepted
  Euphorbia helioscopia var. haussknechtii (Boiss.) Boiss. – not accepted
  Euphorbia helioscopia var. major Mutel – not accepted
  Euphorbia helioscopioides Loscos & Pardo – not accepted
  Euphorbia helioscopioides Blatt. – not accepted
  Euphorbia helleri Millsp. – accepted – Heller's spurge
  Euphorbia helwigii Urb. & Ekman – accepted
  Euphorbia henricksonii M.C. Johnst. – accepted
  Euphorbia henryi Hemsl. – not accepted
  Euphorbia hepatica Urb. & Ekman – accepted
  Euphorbia hepatica P.R.O. Bally & S. Carter – not accepted
  Euphorbia heptagona L. – accepted
  Euphorbia heptapotamica Golosk. – accepted
  Euphorbia heraldiana (Millsp.) Oudejans – not accepted
  Euphorbia herbacea (Pax) Bruyns – accepted
  Euphorbia herbstii (W.L. Wagner) Oudejans – accepted – Herbst's sandmat
  Euphorbia hercegovina Beck – accepted
  Euphorbia hereroensis Pax – not accepted
  Euphorbia hermanschwartzii Rauh – accepted
  Euphorbia hermentiana Lem. – not accepted
  Euphorbia hernandez-pachecoi Caball. – not accepted
  Euphorbia hernariifolia Willd. – not accepted
  Euphorbia herniarifolia Willd. – not accepted – herniaria-leaf spurge
  Euphorbia herniariifolia Willd. – accepted – herniaria-leaf spurge
  Euphorbia herniariifolia var. glaberrima Halácsy – accepted
  Euphorbia herniariifolia var. hebecarpa Boiss. – not accepted
  Euphorbia herniariifolia var. herniariifolia Willd. – accepted
  Euphorbia herniarioides Nutt. – not accepted
  Euphorbia herpetorrhiza Prokh. – not accepted
  Euphorbia herrei A.C. White, R.A. Dyer & B. Sloane – accepted
  Euphorbia herronii Riddell – not accepted
  Euphorbia herteri Arechav. – accepted
  Euphorbia herteri var. glabra Arechav. – not accepted
  Euphorbia heteracantha Pax – not accepted
  Euphorbia heteradena Jaub. & Spach – accepted
  Euphorbia heteradena Boiss. & Buhse – not accepted
  Euphorbia heterantha Nutt. – not accepted
  Euphorbia heterochroma Pax – accepted
  Euphorbia heterochroma ssp. heterochroma Pax – accepted
  Euphorbia heterochroma ssp. tsavoensis S. Carter – accepted
  Euphorbia heterochroma var. mitis (Pax) N.E. Br. – not accepted
  Euphorbia heterodoxa Müll. Arg. – accepted
  Euphorbia heterophylla L. – accepted – Mexican fireplant, painted euphorbia
  Euphorbia heterophylla Desf. – not accepted
  Euphorbia heterophylla f. cyathophora (Murray) Voss – not accepted
  Euphorbia heterophylla f. hirticaulis Kuntze – not accepted
  Euphorbia heterophylla var. barbellata (Engelm.) Holz. – not accepted
  Euphorbia heterophylla var. brasiliensis Müll. Arg. – not accepted
  Euphorbia heterophylla var. cyathophora (Murray) Griseb. – not accepted
  Euphorbia heterophylla var. elliptica (Lam.) Kuntze – not accepted
  Euphorbia heterophylla var. eriocarpa Millsp. – not accepted
  Euphorbia heterophylla var. geniculata (Ortega) M. Gómez – not accepted
  Euphorbia heterophylla var. genuina Boiss. – not accepted
  Euphorbia heterophylla var. graminifolia Engelm. – not accepted
  Euphorbia heterophylla var. linifolia Kuntze – not accepted
  Euphorbia heterophylla var. minor Boiss. – not accepted
  Euphorbia heteropoda Pax – accepted
  Euphorbia heteropoda var. formosa (P.R.O. Bally) Bruyns – accepted
  Euphorbia heteropoda var. heteropoda Pax – accepted
  Euphorbia heterospina S. Carter – accepted
  Euphorbia heterospina ssp. baringoensis S. Carter – accepted
  Euphorbia heterospina ssp. heterospina S. Carter – accepted
  Euphorbia hexadenia Denis – accepted
  Euphorbia hexagona Nutt. ex Spreng. – accepted – sixangle spurge, six-angle spurge
  Euphorbia hexagonoides S. Watson – accepted
  Euphorbia heyligersiana P.I. Forst. – accepted
  Euphorbia heyneana Spreng. – accepted
  Euphorbia heyneana ssp. galioides (Boiss.) Panigrahi – accepted
  Euphorbia heyneana ssp. heyneana Spreng. – accepted
  Euphorbia heyneana ssp. nilagirica (Miq.) Panigrahi – accepted
  Euphorbia heyneana var. scindica Boiss. – not accepted
  Euphorbia hiberna Welw. ex Nyman – not accepted
  Euphorbia hiberna Lepech. – not accepted
  Euphorbia hibernica Spreng. – not accepted
  Euphorbia hiernii (Croizat) Oudejans – accepted
  Euphorbia hieroglyphica Coss. & Durieu ex Boiss. – accepted
  Euphorbia hieroglyphica Correll – not accepted
  Euphorbia hieronymi Subils – accepted
  Euphorbia hieronymi f. parvifolia (Hieron.) Oudejans – not accepted
  Euphorbia hierosolymitana Boiss. – accepted
  Euphorbia hierosolymitana var. hierosolymitana Boiss. – accepted
  Euphorbia hierosolymitana var. ramanensis (Baum) Zohary – accepted
  Euphorbia hillebrandii H. Lév. – not accepted
  Euphorbia hillebrandii var. palikeana O. Deg. & Sherff ex Sherff – not accepted
  Euphorbia hillebrandii var. typica Sherff – not accepted
  Euphorbia hillebrandii var. waimanoana Sherff – not accepted
  Euphorbia himalayensis (Klotzsch) Boiss. – accepted
  Euphorbia hindsiana Benth. – accepted
  Euphorbia hinkleyorum I.M. Johnst. – accepted
  Euphorbia hintonii L.C. Wheeler – accepted
  Euphorbia hippocrepica Hemsl. – not accepted
  Euphorbia hirsuta L. – accepted
  Euphorbia hirsuta (Torr.) Wiegand – not accepted
  Euphorbia hirsuta Kit. ex Boiss. – not accepted
  Euphorbia hirsuta f. crispata (Willd. ex Hornem.) Oudejans – not accepted
  Euphorbia hirsuta f. glabrescens (St.-Lag.) Oudejans – not accepted
  Euphorbia hirsuta f. integrifolia (Deysson) Oudejans – not accepted
  Euphorbia hirsuta f. laevis (Merino) Oudejans – not accepted
  Euphorbia hirsuta f. serrata (Lojac.) Oudejans – not accepted
  Euphorbia hirsuta f. serrulatifolia (Deysson) Oudejans – not accepted
  Euphorbia hirsuta f. subglabra (Gren. & Godr.) Oudejans – not accepted
  Euphorbia hirsuta var. leucotricha (Boiss.) Oudejans – not accepted
  Euphorbia hirsuta var. subglabra (Gren. & Godr.) Nebot, De la Torrek, Mateo & Alcaraz – not accepted
  Euphorbia hirta L. – accepted – pillpod sandmat, pillpod spurge, asthma spurge
  Euphorbia hirta var. destituta L.C. Wheeler – not accepted
  Euphorbia hirta var. glaberrima Koidz. – not accepted
  Euphorbia hirta var. nocens L.C. Wheeler – not accepted
  Euphorbia hirta var. ophthalmica (Pers.) Allem & Irgang – not accepted
  Euphorbia hirta var. procumbens (Boiss.) N.E. Br. – not accepted
  Euphorbia hirta var. typica L.C. Wheeler – not accepted
  Euphorbia hirtella Boiss. – accepted
  Euphorbia hirtella var. brevifolia Müll. Arg. – not accepted
  Euphorbia hirtella var. genuina Müll. Arg. – not accepted
  Euphorbia hirtella var. longifolia Müll. Arg. – not accepted
  Euphorbia hirtella var. pusilla Müll. Arg. – not accepted
  Euphorbia hirtula Engelm. ex S. Watson – not accepted
  Euphorbia hislopii N.E. Br. – not accepted
  Euphorbia hispida Boiss. – accepted
  Euphorbia hissarica Lipsky ex Prokh. – not accepted
  Euphorbia hochstetteriana Pax – not accepted
  Euphorbia hockii De Wild. – accepted
  Euphorbia hoffmanniana (Klotzsch & Garcke) Boiss. – accepted
  Euphorbia hofstaetteri Rauh – accepted
  Euphorbia hohenackeri Hochst. ex Boiss. – not accepted
  Euphorbia hohenackeri Orph. ex Boiss. – not accepted
  Euphorbia holmesiae Lavranos – accepted
  Euphorbia holochlorina Rizzini – accepted
  Euphorbia holstii Pax – not accepted
  Euphorbia holstii var. hebecarpa Pax – not accepted
  Euphorbia homophylla Lange ex Schrank – not accepted
  Euphorbia hondurana Standl. & L.O. Williams – not accepted
  Euphorbia hookeri Steud. – not accepted
  Euphorbia hookeri var. integrifolia Hillebr. – not accepted
  Euphorbia hookeri var. typica Sherff – not accepted
  Euphorbia hooveri L.C. Wheeler – accepted – Hoover's sandmat
  Euphorbia hormorrhiza Radcl.-Sm. – accepted
  Euphorbia horombensis Ursch & Leandri – accepted
  Euphorbia horrida Boiss. – not accepted
  Euphorbia horrida ssp. noorsveldensis A.C. White, R.A. Dyer & B. Sloane – not accepted
  Euphorbia horrida var. major A.C. White, R.A. Dyer & B. Sloane – not accepted
  Euphorbia horrida var. striata A.C. White, R.A. Dyer & B. Sloane – not accepted
  Euphorbia hortensis Engelm. ex Boiss. – not accepted
  Euphorbia horwoodii S. Carter & Lavranos – accepted
  Euphorbia hottentota Marloth – accepted
  Euphorbia howellii L.C. Wheeler – not accepted
  Euphorbia hsinchuensis (S.C. Lin & S.M. Chaw) C.Y. Wu & J.S. Ma – accepted
  Euphorbia huanchahana (Klotzsch & Garcke) Boiss. – accepted
  Euphorbia huanchahana ssp. huanchahana (Klotzsch & Garcke) Boiss. – accepted
  Euphorbia huanchahana ssp. penazuelensis Croizat – accepted
  Euphorbia huanchahana ssp. typica Croizat – not accepted
  Euphorbia huanchahana var. peperomioides Croizat – not accepted
  Euphorbia hubertii Pax – accepted
  Euphorbia huillensis Pax – not accepted
  Euphorbia humayensis Brandegee – accepted
  Euphorbia humbertiana Maire – not accepted
  Euphorbia humbertii Denis – accepted
  Euphorbia humboldtii Willd. – not accepted
  Euphorbia humifusa Willd. – accepted
  Euphorbia humifusa f. glabra (Thell.) S.Z. Liou – not accepted
  Euphorbia humifusa f. pilosa (Thell.) S.Z. Liou – not accepted
  Euphorbia humifusa var. glabra Thell. – not accepted
  Euphorbia humifusa var. pilosa Thell. – not accepted
  Euphorbia humifusa var. pseudochamaesyce (Fisch. & C.A. Mey.) Murata – not accepted
  Euphorbia humilis Ledeb. – accepted
  Euphorbia humilis Royle – not accepted
  Euphorbia humistrata Engelm. ex A. Gray – accepted – spreading sandmat
  Euphorbia hunzikeri Subils – accepted
  Euphorbia hurusawae Oudejans – not accepted
  Euphorbia hurusawae var. imaii (Hurus.) Oudejans – not accepted
  Euphorbia huttonae N.E. Br. – accepted
  Euphorbia hyberna L. – accepted
  Euphorbia hyberna ssp. canuti (Parl.) Tutin – accepted
  Euphorbia hyberna ssp. gibelliana (Peola) Raffaelli – accepted
  Euphorbia hyberna ssp. hyberna L. – accepted
  Euphorbia hyberna ssp. insularis (Boiss.) Briq. – accepted
  Euphorbia hydnorae E. Mey. ex Boiss. – not accepted
  Euphorbia hylonoma Hand.-Mazz. – accepted
  Euphorbia hypericifolia L. – accepted – graceful sandmat
  Euphorbia hypericifolia var. bracteolaris (Boiss.) Ewart – not accepted
  Euphorbia hypericifolia var. coimbatorensis Chandrab. – not accepted
  Euphorbia hypericifolia var. communis Engelm. – not accepted
  Euphorbia hypericifolia var. falciformis Klotzsch – not accepted
  Euphorbia hypericifolia var. hirsuta Torr. – not accepted
  Euphorbia hypericifolia var. maculata Klotzsch – not accepted
  Euphorbia hypericifolia var. pusilla Webb – not accepted
  Euphorbia hypogaea Marloth – accepted
  Euphorbia hypoleuca (Prokh.) Rech. – not accepted
  Euphorbia hyrcana Grossh. – accepted
  Euphorbia hyssopifolia L. – accepted – hyssopleaf sandmat
  Euphorbia hyssopifolia var. blanchetii (Miq. ex Boiss.) Oudejans – not accepted
  Euphorbia hyssopifolia var. paraguayensis (Chodat) Oudejans – not accepted
  Euphorbia hyssopifolia var. pruinosa (Chodat) Oudejans – not accepted
  Euphorbia hyssopifolia var. pubescenticocca Christenh. – not accepted
  Euphorbia hyssopifolia var. pulchella (Kunth) Oudejans – not accepted
  Euphorbia hyssopifolia var. uniflora (Chodat & Hassl.) Oudejans – not accepted
  Euphorbia hystrix Jacq. – not accepted
  Euphorbia iancannellii Bruyns – accepted
  Euphorbia iberica Boiss. – accepted
  Euphorbia iberica var. intermedia Boiss. – not accepted
  Euphorbia idzuensis Nakai ex Hurus. – not accepted
  Euphorbia iharanae Rauh – accepted
  Euphorbia illirica Lam. – accepted
  Euphorbia illirica ssp. semivillosa (Prokh.) Govaerts – not accepted
  Euphorbia iloitaii Powys & S. Carter – accepted
  Euphorbia imaii Hurus. – not accepted
  Euphorbia imaii f. denudata Hurus. – not accepted
  Euphorbia imbricata Vahl – not accepted
  Euphorbia imbricata E.A. Bruce – not accepted
  Euphorbia imbricata Sessé & Moç. – not accepted
  Euphorbia imerina Cremers – accepted
  Euphorbia imitata N.E. Br. – accepted
  Euphorbia immersa P.R.O. Bally & S. Carter – accepted – Denegu
  Euphorbia imparispina S. Carter – accepted
  Euphorbia imperfoliata Vis. – accepted
  Euphorbia impervia A. Berger – not accepted
  Euphorbia implexa Stapf – not accepted
  Euphorbia impressa Chiov. – accepted
  Euphorbia inaequalis N.E. Br. – not accepted
  Euphorbia inaequilatera Sond. – accepted
  Euphorbia inaequilatera var. dentata (N.E. Br.) M.G. Gilbert – not accepted
  Euphorbia inaequilatera var. jemenica (Schweinf.) Oudejans – not accepted
  Euphorbia inaequilatera var. perennis N.E. Br. – not accepted
  Euphorbia inaequilatera var. spanothrix S. Carter – not accepted
  Euphorbia inaequispina N.E. Br. – accepted
  Euphorbia inaguaensis Oudejans – accepted
  Euphorbia inappendiculata Domin – accepted
  Euphorbia inappendiculata var. queenslandica Domin – not accepted
  Euphorbia inarticulata Schweinf. – accepted
  Euphorbia incana Schur – not accepted
  Euphorbia incerta Brandegee – accepted
  Euphorbia incisa Engelm. – not accepted – Mojave spurge
  Euphorbia incisa var. incisa Engelm. – not accepted – Mojave spurge
  Euphorbia incisa var. mollis (Norton) L.C. Wheeler – not accepted – Mojave spurge
  Euphorbia inclinata Boiss. – not accepted
  Euphorbia incompta Ces. – not accepted
  Euphorbia inconspicua Ball – not accepted
  Euphorbia inculta P.R.O. Bally – accepted
  Euphorbia incurva N.E. Br. – not accepted
  Euphorbia indecora N.E. Br. – accepted
  Euphorbia inderiensis Less. ex Kar. & Kir. – accepted
  Euphorbia indica Lam. – accepted
  Euphorbia indica var. angustifolia Boiss. – not accepted
  Euphorbia indica var. pubescens Pax – not accepted
  Euphorbia indistincta P.I. Forst. – accepted
  Euphorbia indivisa (Engelm.) Tidestr. – accepted – royal sandmat
  Euphorbia indurescens L.C. Leach – accepted
  Euphorbia inelegans N.E. Br. – not accepted
  Euphorbia inermis Mill. – accepted
  Euphorbia inermis Pancic ex Boiss. – not accepted
  Euphorbia inermis var. huttonae A.C. White, R.A. Dyer & B. Sloane – not accepted
  Euphorbia inermis var. laniglans N.E. Br. – not accepted
  Euphorbia infausta N.E. Br. – not accepted
  Euphorbia infernidialis V.W. Steinm. – accepted
  Euphorbia infesta Pax – not accepted
  Euphorbia inflexa Urb. & Ekman – accepted
  Euphorbia ingallsii (Small) Cory – not accepted
  Euphorbia ingens E. Mey. ex Boiss. – accepted
  Euphorbia ingenticapsa L.C. Leach – accepted
  Euphorbia innocua L.C. Wheeler – accepted – velvet spurge
  Euphorbia inornata (Dressler) Radcl.-Sm. – not accepted
  Euphorbia insarmentosa P.G. Mey. – accepted
  Euphorbia insulae-europae Pax – not accepted
  Euphorbia insulana Vell. – accepted
  Euphorbia insulana ssp. insulana Vell. – accepted
  Euphorbia insulana ssp. pilcomayensis Croizat – accepted
  Euphorbia insulana ssp. tovarensis (Boiss.) Croizat – accepted
  Euphorbia insulana ssp. typica Croizat – not accepted
  Euphorbia insulana var. minor Müll. Arg. – not accepted
  Euphorbia insulana var. pilcomayensis (Croizat) Oudejans – not accepted
  Euphorbia insulana var. tovarensis (Boiss.) Oudejans – not accepted
  Euphorbia insularis Boiss. – not accepted
  Euphorbia interaxillaris Fernald – not accepted
  Euphorbia intercedens Pax – not accepted
  Euphorbia intermedia Bréb. – not accepted
  Euphorbia intermedia Fisch. & C.A. Mey. ex Boiss. – not accepted
  Euphorbia intermedia Hochst. ex Boiss. – not accepted
  Euphorbia intermixta S. Watson – not accepted
  Euphorbia intisy Drake – accepted
  Euphorbia intricata S. Carter – accepted
  Euphorbia inundata Torr. ex Chapm. – accepted – Florida pineland spurge
  Euphorbia inundata var. garrettii E.L. Bridges & Orzell – accepted – Florida pineland spurge
  Euphorbia inundata var. inundata Torr. ex Chapm. – accepted – Florida pineland spurge
  Euphorbia inundaticola L.C. Leach – accepted
  Euphorbia invaginata Croizat – accepted
  Euphorbia invenusta (N.E. Br.) Bruyns – accepted
  Euphorbia invenusta var. angusta (P.R.O. Bally) Bruyns – accepted
  Euphorbia invenusta var. invenusta (N.E. Br.) Bruyns – accepted
  Euphorbia involucrata (Klotzsch & Garcke) Boiss. – not accepted
  Euphorbia involucrata var. megastegia Boiss. – not accepted
  Euphorbia involuta Millsp. – not accepted
  Euphorbia ipecacuanhae L. – accepted – American ipecac, Carolina ipecac
  Euphorbia ipecacuanhae f. linearis (Moldenke) Fernald – not accepted
  Euphorbia ipecacuanhae var. gracilis Boiss. – not accepted
  Euphorbia ipecacuanhae var. portulacoides Boiss. – not accepted
  Euphorbia iranshahri Pahlevani – accepted
  Euphorbia irgisensis Litv. – accepted
  Euphorbia isacantha Pax – accepted
  Euphorbia isalensis Leandri – accepted
  Euphorbia isatidifolia Lam. – accepted
  Euphorbia isatis Pers. – not accepted
  Euphorbia isaurica M.S. Khan – accepted
  Euphorbia isophylla Bornm. – not accepted
  Euphorbia ispahanica Boiss. – not accepted
  Euphorbia issykkulensis Prokh. – not accepted
  Euphorbia isthmia Täckh. – not accepted
  Euphorbia italica Lam. – not accepted
  Euphorbia italica Salzm. ex Boiss. – not accepted
  Euphorbia italica G. Tineo – not accepted
  Euphorbia iteophylla Boiss. – not accepted
  Euphorbia itremensis Kimnach & Lavranos – accepted
  Euphorbia ivanjohnstonii M.C. Johnst. – accepted
  Euphorbia ixtlana Huft – accepted
  Euphorbia jablonskii V.W. Steinm. – accepted
  Euphorbia jacquemontii Boiss. – accepted
  Euphorbia jacquemontii var. jacquemontii Boiss. – accepted
  Euphorbia jacquemontii var. lasiocarpa Boiss. – accepted
  Euphorbia jacquinii Fenzl ex Boiss. – accepted
  Euphorbia jacquiniiflora Hook. – not accepted
  Euphorbia jacquiniiflora Neumann – not accepted
  Euphorbia jaegeri V.W. Steinm. & J. André – accepted
  Euphorbia jaegeriana Pax – not accepted
  Euphorbia jaliscensis B.L. Rob. & Greenm. – accepted
  Euphorbia jaliscensis var. durangensis Millsp. – not accepted
  Euphorbia jamesonii Boiss. – accepted
  Euphorbia jansenvillensis Nel – accepted
  Euphorbia japonica Siebold ex Boiss. – not accepted
  Euphorbia japonica Zoll. ex Boiss. – not accepted
  Euphorbia japygica Ten. – not accepted
  Euphorbia jaroslavii Poljakov – not accepted
  Euphorbia jasiewiczii (Chrtek & Krísa) Radcl.-Sm. – not accepted
  Euphorbia jatrophoides Pax – accepted
  Euphorbia javanica Jungh. – not accepted
  Euphorbia jaxartica (Prokh.) Krylov – accepted
  Euphorbia jejuna M.C. Johnst. & Warnock – accepted – dwarf sandmat, dwarf broomspurge
  Euphorbia jenisseiensis Baikov – accepted
  Euphorbia jessonii Oudejans – not accepted
  Euphorbia jodhpurensis Blatt. & Hallb. – accepted
  Euphorbia johannis S. Carter – accepted
  Euphorbia johnsonii N.E. Br. – not accepted
  Euphorbia johnstonii Mayfield – accepted
  Euphorbia jolkinii Boiss. – accepted
  Euphorbia jolkinii f. insularis (Hurus.) Oudejans – not accepted
  Euphorbia jonesii Millsp. – not accepted
  Euphorbia josei Oudejans – not accepted – Jose spurge
  Euphorbia jovetii Huguet – not accepted
  Euphorbia joyae P.R.O. Bally & S. Carter – accepted
  Euphorbia jubata L.C. Leach – accepted
  Euphorbia juncea Aiton – not accepted
  Euphorbia junciformis Sessé & Moç. – not accepted
  Euphorbia juncoides (Haw.) Sweet – not accepted
  Euphorbia juniperifolia Rich. ex Boiss. – not accepted
  Euphorbia juttae Dinter – accepted
  Euphorbia kabridarensis Thulin – accepted
  Euphorbia kadapensis Sarojin. & R.R.V. Raju – accepted
  Euphorbia kaessneri Pax – accepted
  Euphorbia kaessneri (N.E. Br.) Bruyns – not accepted
  Euphorbia kahirensis Raeusch. – not accepted
  Euphorbia kalaharica Marloth – not accepted
  Euphorbia kaleniczenkii Czern. – not accepted
  Euphorbia kalisana S. Carter – accepted
  Euphorbia kamerunica Pax – accepted
  Euphorbia kamponii Rauh & Petignat – accepted
  Euphorbia kanalensis Boiss. – accepted
  Euphorbia kanaorica Boiss. – accepted
  Euphorbia kangdingensis W.T. Wang – not accepted
  Euphorbia kangdingensis var. puberula W.T. Wang – not accepted
  Euphorbia kansuensis Prokh. – accepted
  Euphorbia kansui S.L. Liou ex S.B. Ho – accepted
  Euphorbia kaokoensis (A.C. White, R.A. Dyer & B. Sloane) L.C. Leach – accepted
  Euphorbia karibensis S. Carter – accepted
  Euphorbia karoi Freyn – not accepted
  Euphorbia karroensis (Boiss.) N.E. Br. – accepted
  Euphorbia karwinskyi Boiss. – not accepted
  Euphorbia kaschgarica Regel – not accepted
  Euphorbia katrajensis Gage – accepted
  Euphorbia kazerouni Parsa – not accepted
  Euphorbia keithii R.A. Dyer – accepted
  Euphorbia kelleri Pax – accepted
  Euphorbia kelleri var. kelleri Pax – accepted
  Euphorbia kelleri var. latifolia Pax – accepted
  Euphorbia kemulariae Ter-Chatsch. – not accepted
  Euphorbia kerneri Huter ex A. Kern. – accepted
  Euphorbia kerrii Craib – not accepted
  Euphorbia kerstingii Pax – accepted
  Euphorbia khasyana Boiss. – accepted
  Euphorbia khorasanica Saeidi & Ghayorm. – accepted
  Euphorbia kibwezensis N.E. Br. – not accepted
  Euphorbia kilimandscharica Pax ex Engl. – not accepted
  Euphorbia kilwana N.E. Br. – accepted
  Euphorbia kimberleyana (G. Will.) Bruyns – accepted
  Euphorbia kimberleyensis B.G. Thomson – accepted
  Euphorbia kimmerica Lipsky ex Grossh. – accepted
  Euphorbia kingdon-wardii Binojk. & N.P. Balakr. – accepted
  Euphorbia kirimzjulica Stepanov – accepted
  Euphorbia kiritensis P.R.O. Bally & S. Carter – accepted
  Euphorbia kirkii (N.E. Br.) Bruyns – accepted
  Euphorbia kischenensis Vierh. – accepted
  Euphorbia kitagawae (Hurus.) Kitag. – not accepted
  Euphorbia klokoviana Railyan – not accepted
  Euphorbia klokovii Dubovik – not accepted
  Euphorbia klotzschiana Miq. – not accepted
  Euphorbia klotzschii Oudejans – accepted
  Euphorbia klotzschii var. argentina (Müll. Arg. ex Griseb.) Oudejans – not accepted
  Euphorbia klotzschii var. dentata (R.E. Fr.) Oudejans – not accepted
  Euphorbia klotzschii var. schizosepala (Engelm. ex Boiss.) Oudejans – not accepted
  Euphorbia knobelii Letty – accepted
  Euphorbia knuthii Pax – accepted
  Euphorbia knuthii ssp. johnsonii (N.E. Br.) L.C. Leach – accepted
  Euphorbia knuthii ssp. knuthii Pax – accepted
  Euphorbia koerneriana Allem & Irgang – not accepted
  Euphorbia komaroviana Prokh. – accepted
  Euphorbia kondoi Rauh & Razaf. – accepted
  Euphorbia kopetdaghensis Korovin ex Prokh. – not accepted
  Euphorbia kopetdaghi (Prokh.) Prokh. – accepted
  Euphorbia korovinii Pavlov – not accepted
  Euphorbia korshinskyi Geltman – accepted
  Euphorbia kotschyana Fenzl – accepted
  Euphorbia kotschyana var. kotschyana Fenzl – accepted
  Euphorbia kotschyana var. thyrsoidea Boiss. – accepted
  Euphorbia kouandenensis Beille ex A. Chev. – accepted
  Euphorbia kozlovii Prokh. – accepted
  Euphorbia kozlovii var. angustifolia S.Q. Zhou – not accepted
  Euphorbia kralickii Coss. ex Batt. & Trab. – not accepted
  Euphorbia kraussiana Bernh. ex Krauss – accepted
  Euphorbia kudrjaschevii (Pazij) Prokh. – accepted
  Euphorbia kundelunguensis (Malaisse) Bruyns – accepted
  Euphorbia kunzei Lehm. – not accepted
  Euphorbia kurdica Boiss. – not accepted
  Euphorbia kuriensis Vierh. – accepted
  Euphorbia kurioca Bornm. – not accepted
  Euphorbia kurtzii Subils – accepted
  Euphorbia kuwaleana O. Deg. & Sherff – accepted – kokomalei
  Euphorbia kwebensis N.E. Br. – not accepted
  Euphorbia labatii Rauh & Bard.-Vauc. – accepted
  Euphorbia labbei H. Lév. – not accepted
  Euphorbia lacei Craib – accepted
  Euphorbia lacera Boiss. – accepted
  Euphorbia laciniata Panigrahi – accepted
  Euphorbia laciniata ssp. burmanica Panigrahi – not accepted
  Euphorbia lactea Haw. – accepted – mottled spurge
  Euphorbia lactea Roxb. – not accepted
  Euphorbia lactiflua Phil. – accepted
  Euphorbia laeta Aiton – not accepted
  Euphorbia laeta B. Heyne ex Roth – not accepted
  Euphorbia laevigata Lam. – accepted
  Euphorbia laevigata Vahl – not accepted
  Euphorbia lagascae Spreng. – accepted
  Euphorbia lagascae Spruner ex Nyman – not accepted
  Euphorbia lagunensis Huft – accepted
  Euphorbia lagunillarum Croizat – accepted
  Euphorbia laikipiensis S. Carter – accepted
  Euphorbia lamarckii Sweet – accepted
  Euphorbia lamarckii f. latibracteata (G. Kunkel) Oudejans – not accepted
  Euphorbia lamarckii ssp. regis-jubae (Webb & Berthel.) Oudejans – not accepted
  Euphorbia lamarckii var. berthelotii (Bolle ex Boiss.) Oudejans – not accepted
  Euphorbia lamarckii var. desfoliata (Menezes) Oudejans – not accepted
  Euphorbia lamarckii var. pseudodendroides (H. Lindb.) Oudejans – not accepted
  Euphorbia lambii Svent. – not accepted
  Euphorbia lamprocarpa (Prokh.) Prokh. – accepted
  Euphorbia lanata Sieber ex Spreng. – not accepted
  Euphorbia lancasteriana Radcl.-Sm. – not accepted
  Euphorbia lanceolaria Wall. – not accepted
  Euphorbia lanceolata Spreng. – not accepted
  Euphorbia lanceolata Larrańaga – not accepted
  Euphorbia lanceolata Liou – not accepted
  Euphorbia lanceolata Phil. – not accepted
  Euphorbia lancifolia Schltdl. – accepted – ixbut
  Euphorbia lancifolia var. villicaulis Fernald – not accepted
  Euphorbia lanuginosa Lam. – not accepted
  Euphorbia lanuginosa Thuill. – not accepted
  Euphorbia laredana Millsp. – accepted – Laredo sandmat
  Euphorbia larica Boiss. – accepted
  Euphorbia laro Drake – not accepted
  Euphorbia larranagae Oudejans – accepted
  Euphorbia lasiocarpa Klotzsch – accepted – roadside sandmat
  Euphorbia lasiocarpa K. Koch – not accepted
  Euphorbia lasiocarpa var. subprostrata Boiss. – not accepted
  Euphorbia lasiocaula Boiss. – not accepted
  Euphorbia lasiocaula f. maritima (Hurus.) T. Kuros. & H. Ohashi – not accepted
  Euphorbia lasiocaula var. ibukiensis (Hurus.) T. Kuros. & H. Ohashi – not accepted
  Euphorbia lata Engelm. – accepted – hoary sandmat, broadleaf spurge
  Euphorbia latazi Kunth – not accepted
  Euphorbia latazi var. glabra Steyerm. – not accepted
  Euphorbia latericolor Brandegee – not accepted
  Euphorbia lateriflora Schumach. – accepted
  Euphorbia lateriflora Jaub. & Spach – not accepted
  Euphorbia lathyris L. – accepted – moleplant, cańamón purgante, gopher plant, caper spurge
  Euphorbia lathyris Georgi – not accepted
  Euphorbia lathyris var. minor Hook. & Arn. – not accepted
  Euphorbia lathyrus L. – not accepted
  Euphorbia latifolia C.A. Mey. ex Ledeb. – accepted
  Euphorbia latifolia Boiss. – not accepted
  Euphorbia latifolia Salzm. ex Boiss. – not accepted
  Euphorbia latifolia var. intermedia Boiss. – not accepted
  Euphorbia laurentii De Wild. – not accepted
  Euphorbia laurifolia Juss. ex Lam. – accepted – Nonocta, nońocta, Lechero
  Euphorbia lavicola S. Carter – accepted
  Euphorbia lavranii L.C. Leach – accepted
  Euphorbia lawsonii Binojk. & Dwarakan – accepted
  Euphorbia laxiflora Kuntze – not accepted
  Euphorbia leachii Lawant & van Veldh. – accepted
  Euphorbia lecheoides Millsp. – accepted
  Euphorbia lecheoides var. exumensis (Millsp.) Oudejans – accepted
  Euphorbia lecheoides var. lecheoides Millsp. – accepted
  Euphorbia lecheoides var. wilsonii (Millsp.) Oudejans – accepted
  Euphorbia ledebourii Boiss. – not accepted
  Euphorbia ledermanniana Pax & K. Hoffm. – accepted
  Euphorbia ledienii A. Berger – accepted
  Euphorbia lehmanniana Pax – not accepted
  Euphorbia lehmbachii Pax – not accepted
  Euphorbia leiococca (Engelm.) Norton – not accepted
  Euphorbia leiosperma Sibth. & Sm. – not accepted
  Euphorbia leiosperma (Klotzsch & Garcke) Boiss. – not accepted
  Euphorbia leistneri R.H. Archer – accepted
  Euphorbia lemaireana Boiss. – not accepted
  Euphorbia lemesiana Hadjik., Hand, Christodoulou & Frajman – accepted
  Euphorbia lenensis Baikov – accepted
  Euphorbia lenewtonii S. Carter – accepted
  Euphorbia leonardii (D.G. Burch) Radcl.-Sm. – accepted
  Euphorbia leoncroizatii Oudejans – not accepted
  Euphorbia leonensis N.E. Br. – not accepted
  Euphorbia leontopoda S. Carter – accepted
  Euphorbia lepidocarpa Pax – not accepted
  Euphorbia leptalea S. Schauer – not accepted
  Euphorbia leptocaula Boiss. – accepted
  Euphorbia leptocaula var. praecox Boiss. – not accepted
  Euphorbia leptocera Engelm. ex Boiss. – not accepted
  Euphorbia leptocera Engelm. ex Torr. – not accepted
  Euphorbia leptocera var. crenulata (Engelm.) Boiss. – not accepted
  Euphorbia leptoclada Balf. f. – accepted
  Euphorbia leptomyura Baill. ex Poiss. – not accepted
  Euphorbia leptophylla Vill. – not accepted
  Euphorbia leshumensis N.E. Br. – not accepted
  Euphorbia letestuana (Denis) Bruyns – accepted
  Euphorbia letestui J. Raynal – accepted
  Euphorbia letouzeyana (Malaisse) Bruyns – accepted
  Euphorbia leucantha (Klotzsch & Garcke) Boiss. – accepted
  Euphorbia leucocephala Lotsy – accepted – pascuita
  Euphorbia leucochlamys Chiov. – accepted
  Euphorbia leucodendron Drake – not accepted
  Euphorbia leucodendron ssp. oncoclada (Drake) Rauh & Koutnik – not accepted
  Euphorbia leucoloma Raf. – not accepted
  Euphorbia leuconeura Boiss. – accepted
  Euphorbia leucophylla Benth. – accepted
  Euphorbia leucophylla ssp. comcaacorum V.W. Steinm. & Felger – accepted
  Euphorbia leucophylla ssp. leucophylla Benth. – accepted
  Euphorbia leucotricha Boiss. – not accepted
  Euphorbia leviana Croizat – not accepted
  Euphorbia levis Poir. – not accepted
  Euphorbia levis var. imbricata Boiss. – not accepted
  Euphorbia libassii Lojac. – not accepted
  Euphorbia lignosa Marloth – accepted
  Euphorbia ligulata Chaub. – not accepted
  Euphorbia ligustrina Boiss. – not accepted
  Euphorbia liliputiana C. Wright ex Urb. – not accepted
  Euphorbia limaensis Oudejans – not accepted
  Euphorbia limpopoana L.C. Leach ex S. Carter – accepted
  Euphorbia linaria Link – not accepted
  Euphorbia linarifolia Willd. – not accepted
  Euphorbia linariifolia Lam. – not accepted
  Euphorbia linarioides Poir. – not accepted
  Euphorbia lindeniana A. Rich. – not accepted
  Euphorbia lindenii (S. Carter) Bruyns – accepted
  Euphorbia lindheimeriana Engelm. ex Boiss. – not accepted
  Euphorbia linearibracteata L.C. Leach – accepted
  Euphorbia linearifolia Roth – not accepted
  Euphorbia linearifolia var. nallamalayana J.L. Ellis – not accepted
  Euphorbia linearis Retz. – accepted
  Euphorbia linearis Schrank – not accepted
  Euphorbia linearis B. Heyne ex Roth – not accepted
  Euphorbia linearis var. heterophylla Kuntze – not accepted
  Euphorbia lineata S. Watson – accepted
  Euphorbia lingiana C. Shih – not accepted
  Euphorbia linguiformis McVaugh – accepted
  Euphorbia linguiformis var. actinadenia (McVaugh) Oudejans – not accepted
  Euphorbia lingulata Heuff. – not accepted
  Euphorbia linifolia Nath. ex L. – not accepted
  Euphorbia linifolia Wall. ex Boiss. – not accepted
  Euphorbia linifolia Burm. f. – not accepted
  Euphorbia linifolia Vahl – not accepted
  Euphorbia lioui C.Y. Wu & J.S. Ma – accepted
  Euphorbia lipskyi (Prokh.) Prokh. – accepted
  Euphorbia lissosperma S. Carter – accepted
  Euphorbia literata Jacq. – not accepted
  Euphorbia litoralis Kunth – not accepted
  Euphorbia litoralis Sessé & Moç. – not accepted
  Euphorbia litoralis Noë ex Nyman – not accepted
  Euphorbia littorea Miq. ex Boiss. – not accepted
  Euphorbia litwinowii Prokh. – not accepted
  Euphorbia liukiuensis Hayata – accepted
  Euphorbia livida E. Mey. ex Boiss. – accepted
  Euphorbia lividiflora L.C. Leach – accepted
  Euphorbia loandensis N.E. Br. – accepted
  Euphorbia lockhartii Steud. – not accepted
  Euphorbia lohaensis Baill. – not accepted
  Euphorbia loiseleurii Rouy – not accepted
  Euphorbia lombardensis Nel – not accepted
  Euphorbia lomelii V.W. Steinm. – accepted
  Euphorbia longibracteata DC. – not accepted
  Euphorbia longibracteata Pax – not accepted
  Euphorbia longicorniculata Kitam. – not accepted
  Euphorbia longicornuta S. Watson – accepted
  Euphorbia longicornuta Pax ex Engl. – not accepted
  Euphorbia longicornuta var. pubescens N.E. Br. – not accepted
  Euphorbia longicruris Scheele – accepted – wedgeleaf spurge, wedge-leaf spurge
  Euphorbia longifolia Lam. – not accepted
  Euphorbia longifolia D. Don – not accepted
  Euphorbia longifolia Baill. ex Boiss. – not accepted
  Euphorbia longifolia Gueldenst. – not accepted
  Euphorbia longifolia var. canariensis (Boiss.) Oudejans – not accepted
  Euphorbia longinsulicola S.R. Hill – accepted
  Euphorbia longipetiolata Pax & K. Hoffm. – not accepted
  Euphorbia longipetiolata M.E. Jones – not accepted
  Euphorbia longipila Rusby – not accepted
  Euphorbia longiradiata Lapeyr. – not accepted
  Euphorbia longiramosa S. Watson – not accepted
  Euphorbia longispina Chiov. – accepted
  Euphorbia longistyla Boiss. – accepted
  Euphorbia longituberculosa Hochst. ex Boiss. – accepted
  Euphorbia lophiosperma S. Carter – accepted
  Euphorbia lophogona Lam. – accepted
  Euphorbia lophogona var. lophogona Lam. – accepted
  Euphorbia lophogona var. tenuicaulis Rauh – accepted
  Euphorbia lorentii Hochst. – not accepted
  Euphorbia lorentzii Müll. Arg. – not accepted
  Euphorbia loreyi Jord. – not accepted
  Euphorbia loricata Lam. – accepted
  Euphorbia lorifolia (A. Gray ex H. Mann) Hillebr. – not accepted
  Euphorbia lorifolia var. gracilis Rock – not accepted
  Euphorbia lottiae V.W. Steinm. – accepted
  Euphorbia louisii Thiébaut – not accepted
  Euphorbia louwii L.C. Leach – accepted
  Euphorbia luapulana L.C. Leach – accepted
  Euphorbia lucida Waldst. & Kit. – accepted – shining spurge
  Euphorbia lucida f. angustifolia (Tausch) Slavík – not accepted
  Euphorbia lucida f. leiocarpa (Tausch) Slavík – not accepted
  Euphorbia lucida var. androsaemifolia (Haw.) Schur – not accepted
  Euphorbia lucida var. angustifolia Tausch – not accepted
  Euphorbia lucida var. esulolucida André – not accepted
  Euphorbia lucida var. leiocarpa Tausch – not accepted
  Euphorbia lucida var. salicifolia Wimm. & Grab. – not accepted
  Euphorbia luciismithii B.L. Rob. & Greenm. – accepted
  Euphorbia lucorum Rupr. – accepted
  Euphorbia lucorum var. parvifolia H.L. Yang – not accepted
  Euphorbia lugardiae (N.E. Br.) Bruyns – accepted
  Euphorbia lugubris Chabert – not accepted
  Euphorbia lukoseana S. Carter – accepted
  Euphorbia lumbricalis L.C. Leach – accepted
  Euphorbia lundelliana Croizat – accepted
  Euphorbia lunulata Bunge – accepted
  Euphorbia lupatensis N.E. Br. – accepted
  Euphorbia lupulina Boiss. – not accepted
  Euphorbia lurida Engelm. – accepted – San Francisco Mountain spurge, woodland spurge
  Euphorbia lurida var. pringlei Norton – not accepted
  Euphorbia lusitanica Steud. – not accepted
  Euphorbia lutea Alam. ex Boiss. – not accepted
  Euphorbia luteola Kralik – not accepted
  Euphorbia luteoviridis D.G. Long – accepted
  Euphorbia lutescens C.A. Mey. – not accepted
  Euphorbia luticola Hand.-Mazz. – not accepted
  Euphorbia lutosa S. Carter – accepted
  Euphorbia lutulenta (Croizat) Oudejans – accepted
  Euphorbia lutzenbergeriana Croizat – not accepted
  Euphorbia luzoniensis Merr. – accepted
  Euphorbia lycia Boiss. – not accepted
  Euphorbia lycioides Boiss. – accepted
  Euphorbia lyciopsis Pax – not accepted
  Euphorbia lydenburgensis Schweick. & Letty – accepted
  Euphorbia maackii Meinsh. – not accepted
  Euphorbia macella N.E. Br. – not accepted
  Euphorbia macgillivrayi Boiss. – accepted
  Euphorbia macgillivrayi var. filipes (Benth.) Domin – not accepted
  Euphorbia macgillivrayi var. micradenia (Boiss.) Domin – not accepted
  Euphorbia macgillivrayi var. pseudoserrulata Domin – not accepted
  Euphorbia macgillivrayi var. typica Domin – not accepted
  Euphorbia macgillivrayi var. yarrabensis Domin – not accepted
  Euphorbia machrisiae Steyerm. – accepted
  Euphorbia maconochieana B.G. Thomson – accepted
  Euphorbia macowanii N.E. Br. – not accepted
  Euphorbia macra Hiern – accepted
  Euphorbia macraulonia Phil. – accepted
  Euphorbia macrocarpa Boiss. & Buhse – accepted
  Euphorbia macroceras Fisch. & C.A. Mey. – accepted
  Euphorbia macroclada Boiss. – accepted
  Euphorbia macroclada var. aceras Hand.-Mazz. – not accepted
  Euphorbia macrophylla Pax – accepted
  Euphorbia macropodoides B.L. Rob. & Greenm. – accepted
  Euphorbia macropus (Klotzsch & Garcke) Boiss. – accepted – Huachuca Mountain spurge
  Euphorbia macrorhiza Ledeb. – accepted
  Euphorbia macrostegia Boiss. – not accepted
  Euphorbia macrostegia var. pauciradiata Bornm. – not accepted
  Euphorbia maculata auct. non L. – not accepted
  Euphorbia maculata L. – accepted – milk purslane, prostrate spurge, spotted spurge, spotted sandmat
  Euphorbia maculata Lechl. ex Boiss. – not accepted
  Euphorbia maculata var. detonsa Engelm. ex Boiss. – not accepted
  Euphorbia maculata var. parvula Riddell – not accepted
  Euphorbia macvaughii Carvajal & Lomelí – accepted
  Euphorbia madagascariensis Comm. ex Lam. – not accepted
  Euphorbia maddenii Boiss. – accepted
  Euphorbia madinahensis Fayed & D. Al-Zahrani – accepted – Karath, Karathah
  Euphorbia mafingensis (Hargreaves) Bruyns – accepted
  Euphorbia magdalenae Benth. – accepted
  Euphorbia maglicensis Rohlena – not accepted
  Euphorbia magnicapsula S. Carter – accepted
  Euphorbia magnicapsula var. lacertosa S. Carter – accepted
  Euphorbia magnicapsula var. magnicapsula S. Carter – accepted
  Euphorbia magnidens Haw. ex Salm.-Dyck – not accepted
  Euphorbia magnifica (E.A. Bruce) Bruyns – accepted
  Euphorbia mahabobokensis Rauh – accepted
  Euphorbia mahafalensis Denis – accepted
  Euphorbia mahafalensis var. mahafalensis Denis – accepted
  Euphorbia mahafalensis var. xanthadenia (Denis) Leandri – accepted
  Euphorbia mainiana Poiss. – accepted
  Euphorbia mainty Denis ex Leandri – accepted
  Euphorbia mairei H. Lév. – not accepted
  Euphorbia mairei var. luteociliata W.T. Wang – not accepted
  Euphorbia major (Pax) Bruyns – accepted
  Euphorbia makallensis S. Carter – accepted
  Euphorbia makinoi Hayata – accepted
  Euphorbia malaca (Small) Little – not accepted
  Euphorbia malachophylla Clarke – not accepted
  Euphorbia malacitana Pau – not accepted
  Euphorbia maleevii Tamamsch. – not accepted
  Euphorbia maleolens E. Phillips – accepted
  Euphorbia malevola L.C. Leach – accepted
  Euphorbia malevola ssp. bechuanica L.C. Leach – not accepted
  Euphorbia malleata Boiss. – accepted
  Euphorbia malurensis Rech. f. – accepted
  Euphorbia malvana Maire – accepted
  Euphorbia mamfwensis (Malaisse & Lecron) Bruyns – accepted
  Euphorbia mamillosa Lem. – not accepted
  Euphorbia mammillaris L. – accepted
  Euphorbia mananarensis Leandri – accepted
  Euphorbia manca A. Nelson – not accepted
  Euphorbia mancinella Baill. – not accepted
  Euphorbia mandoniana Boiss. – accepted
  Euphorbia mandravioky Leandri – accepted
  Euphorbia mandshurica Maxim. – accepted
  Euphorbia mangelsdorffii Rauh – accepted
  Euphorbia mangletii Urb. – not accepted
  Euphorbia mangokyensis Denis – accepted
  Euphorbia mangorensis Leandri – accepted
  Euphorbia maoershanensis F.N. Wei & J.S. Ma – accepted
  Euphorbia marayensis Subils – accepted
  Euphorbia maresii Knoche – accepted
  Euphorbia maresii ssp. balearica (Willk.) Malag. – accepted
  Euphorbia maresii ssp. maresii Knoche – accepted
  Euphorbia margalidiana Kuhbier & Lewej. – accepted
  Euphorbia margaretae S. Carter – accepted
  Euphorbia marginata Pursh – accepted – snow on the mountain, snow-on-the-mountain, smoke-on-the-prairie, variegated spurge, whitemargined spurge
  Euphorbia marginata Kunth – not accepted
  Euphorbia marginata var. uloleuca Engelm. & A. Gray – not accepted
  Euphorbia marianoi Oudejans – not accepted
  Euphorbia marie-cladieae Rzepecky – accepted
  Euphorbia marilandica Greene – not accepted
  Euphorbia mariolensis Rouy – not accepted
  Euphorbia maritae Rauh – accepted
  Euphorbia maritima Nutt. – not accepted
  Euphorbia maritima Willd. ex Boiss. – not accepted
  Euphorbia marlothii Pax – not accepted
  Euphorbia marrupana Bruyns – accepted
  Euphorbia marsabitensis S. Carter – accepted
  Euphorbia marschalliana Boiss. – accepted
  Euphorbia marschalliana Kotschy ex Boiss. – not accepted
  Euphorbia marschalliana ssp. armena (Prokh.) Oudejans – accepted
  Euphorbia marschalliana ssp. marschalliana Boiss. – accepted
  Euphorbia martinae Rauh – accepted
  Euphorbia martiusiana Steud. – not accepted
  Euphorbia maryrichardsiae G. Will. – accepted
  Euphorbia masirahensis Ghaz. – accepted
  Euphorbia massiliensis DC. – not accepted
  Euphorbia matabelensis Pax – accepted
  Euphorbia matritensis Boiss. – accepted
  Euphorbia mauritanica L. – accepted
  Euphorbia mauritanica Webb ex J. Gay – not accepted
  Euphorbia mayana Millsp. – not accepted
  Euphorbia mayfieldii V.W. Steinm. – accepted
  Euphorbia maysillesii McVaugh – not accepted
  Euphorbia mayuranathanii Croizat – accepted
  Euphorbia mazandaranica Pahlevani – accepted
  Euphorbia mazarronensis Esteve – not accepted
  Euphorbia mazatlamensis Oudejans – not accepted
  Euphorbia mazicum Emb. & Maire – accepted
  Euphorbia mbaluensis Pax – not accepted
  Euphorbia mcvaughiana M.C. Johnst. – accepted
  Euphorbia mcvaughii M.C. Johnst. – not accepted
  Euphorbia media N.E. Br. – not accepted
  Euphorbia media var. bashawei N.E. Br. – not accepted
  Euphorbia medicaginea Boiss. – accepted
  Euphorbia medicaginea ssp. arsenariensis (Batt.) Batt. – not accepted
  Euphorbia medicaginea var. arsenariensis Batt. – not accepted
  Euphorbia medicaginea var. genuina Maire – not accepted
  Euphorbia medicaginea var. oblongifolia Ball – not accepted
  Euphorbia medusae Panz. – not accepted
  Euphorbia meenae S. Carter – accepted
  Euphorbia megalantha Boiss. – not accepted
  Euphorbia megalantha var. denticulata Boiss. – not accepted
  Euphorbia megalantha var. gracilis Boiss. – not accepted
  Euphorbia megalantha var. hirtiflora Boiss. – not accepted
  Euphorbia megalatlantica Ball – accepted
  Euphorbia megalatlantica ssp. briquetii (Emb. & Maire) Losa & Vindt – not accepted
  Euphorbia megalocarpa Rech. f. – accepted
  Euphorbia meganaesos Featherman – accepted
  Euphorbia megapolitana Henker & Kiesew. – accepted
  Euphorbia megistopoda Diels – not accepted
  Euphorbia mehadiensis Kit. – not accepted
  Euphorbia melanacantha Drake – not accepted
  Euphorbia melanadenia Torr. & A. Gray – accepted – prostrate spurge, red-gland spurge, squaw sandmat
  Euphorbia melanadenia var. subinappendiculata Engelm. – not accepted
  Euphorbia melanocarpa Boiss. – not accepted
  Euphorbia melanohydrata Nel – accepted
  Euphorbia melanohydrata ssp. conica Swanepoel – accepted
  Euphorbia melanohydrata ssp. melanohydrata Nel – accepted
  Euphorbia melanosticta E. Mey. ex Boiss. – not accepted
  Euphorbia melapetala Gasp. ex Guss. – accepted
  Euphorbia melapetala var. leiocarpa Guss. ex Boiss. – not accepted
  Euphorbia melicae Ewest – accepted
  Euphorbia melillensis Sennen & Mauricio – not accepted
  Euphorbia melitensis Parl. – accepted
  Euphorbia mellifera Aiton – accepted
  Euphorbia mellifera Seub. – not accepted
  Euphorbia mellifera var. canariensis Boiss. – not accepted
  Euphorbia meloformis Aiton – accepted
  Euphorbia meloformis f. falsa (N.E. Br.) Marx – not accepted
  Euphorbia meloformis f. magna R.A. Dyer ex G. Marx – not accepted
  Euphorbia meloformis ssp. meloformis Aiton – accepted
  Euphorbia meloformis ssp. valida (N.E. Br.) G.D. Rowley – accepted
  Euphorbia meloniformis Lem. – not accepted
  Euphorbia membranacea Pax – not accepted
  Euphorbia memoralis R.A. Dyer – accepted
  Euphorbia mendax Maire & Wilczek – not accepted
  Euphorbia mendezii Boiss. – accepted – Mendez's sandmat
  Euphorbia menelikii Pax – not accepted
  Euphorbia mercurialina Michx. – accepted – mercury spurge
  Euphorbia mercurialis Pers. – not accepted
  Euphorbia meridensis Pittier – not accepted
  Euphorbia meridionalis P.R.O. Bally & S. Carter – accepted
  Euphorbia merkeri N.E. Br. – not accepted
  Euphorbia mertonii Fosberg – accepted
  Euphorbia mesembrianthemifolia Jacq. – not accepted – coastal beach sandmat
  Euphorbia mesembryanthemifolia Jacq. – accepted – Coastal beach sandmat
  Euphorbia mesembryanthemifolia f. florida (Millsp.) Oudejans – not accepted
  Euphorbia mesembryanthemifolia f. reclinata (Millsp.) Oudejans – not accepted
  Euphorbia mesembryanthemifolia f. seminuda (Millsp.) Oudejans – not accepted
  Euphorbia mesembryanthemifolia var. flexuosa (Kunth) Oudejans – not accepted
  Euphorbia mesembryanthemifolia var. ramosissima (Millsp.) Oudejans – not accepted
  Euphorbia mesopotamica M.S. Khan – not accepted
  Euphorbia messeniaca Heldr. ex Halácsy – not accepted
  Euphorbia meuleniana O. Schwartz – accepted
  Euphorbia meuselii Geltman – not accepted
  Euphorbia mexiae Standl. – accepted
  Euphorbia mexicana (Engelm.) Norton – not accepted
  Euphorbia meyeniana Klotzsch – accepted
  Euphorbia meyeniana var. viscidula Boiss. – not accepted
  Euphorbia meyeri Boiss. – not accepted
  Euphorbia meyeri Steud. – not accepted
  Euphorbia meyeri Nel – not accepted
  Euphorbia meyeriana Galushko – not accepted
  Euphorbia micans Scheele – not accepted
  Euphorbia michaelii Thulin – accepted
  Euphorbia micracantha Boiss. – accepted
  Euphorbia micractina Boiss. – accepted
  Euphorbia micractina var. tangutica (Prokh.) W.T. Wang – not accepted
  Euphorbia micradenia Boiss. – not accepted
  Euphorbia micrantha Stephan ex Willd. – not accepted
  Euphorbia microappendiculata Lotsy – not accepted
  Euphorbia microcarpa (Prokh.) Krylov – accepted
  Euphorbia microcephala Boiss. – not accepted
  Euphorbia microclada Urb. – not accepted
  Euphorbia micromera Boiss. ex Engelm. – accepted – Sonoran sandmat, tiny sandmat, desert spurge
  Euphorbia microphylla Lam. – not accepted
  Euphorbia microphylla B. Heyne ex Roth – not accepted
  Euphorbia microsciadia Boiss. – accepted
  Euphorbia microsperma (Murb.) K. Malý – not accepted
  Euphorbia microsphaera Boiss. – accepted
  Euphorbia migiurtinorum Chiov. – accepted
  Euphorbia milii Des Moul. – accepted – christplant
  Euphorbia milii f. lutea Leandri – not accepted
  Euphorbia milii var. bevilaniensis (Croizat) Ursch & Leandri – accepted
  Euphorbia milii var. bosseri Rauh – not accepted
  Euphorbia milii var. breoni Ursch & Leandri – not accepted
  Euphorbia milii var. hislopii (N.E. Br.) Ursch & Leandri – accepted
  Euphorbia milii var. imperatae Ursch & Leandri – not accepted
  Euphorbia milii var. longifolia Rauh – accepted
  Euphorbia milii var. milii Des Moul. – accepted
  Euphorbia milii var. roseana Marn.-Lap. ex J.-P. Demoly – accepted
  Euphorbia milii var. splendens (Bojer ex Hook.) Ursch & Leandri – accepted
  Euphorbia milii var. tananarivae Leandri – not accepted
  Euphorbia milii var. tenuispina Rauh & Razaf. – accepted
  Euphorbia milii var. tulearensis Ursch & Leandri – accepted
  Euphorbia milii var. vulcani Leandri – not accepted
  Euphorbia millotii Ursch & Leandri – accepted
  Euphorbia millspaughii V.W. Steinm. & P.E. Berry – accepted
  Euphorbia minbuensis Gage – accepted
  Euphorbia minima (Haw.) Mart. – not accepted
  Euphorbia minuta Loscos & Pardo – accepted
  Euphorbia minuta Phil. – not accepted
  Euphorbia minuta ssp. minuta Loscos & Pardo – accepted
  Euphorbia minuta ssp. moleroi P. Monts. & Ferrández – accepted
  Euphorbia minutiflora N.E. Br. – not accepted
  Euphorbia minutifolia Boiss. – not accepted
  Euphorbia minutula Boiss. – accepted
  Euphorbia minxianensis W.T. Wang – not accepted
  Euphorbia miricornis Maire & Wilczek – not accepted
  Euphorbia miscella L.C. Leach – not accepted
  Euphorbia misella S. Watson – accepted
  Euphorbia misera Benth. – accepted – cliff spurge
  Euphorbia missurica Raf. – accepted – prairie spurge, prairie sandmat, Missouri spurge
  Euphorbia missurica var. calcicola (Shinners) Waterf. – not accepted
  Euphorbia missurica var. intermedia (Engelm.) L.C. Wheeler – not accepted
  Euphorbia missurica var. missurica Raf. – not accepted – prairie spurge
  Euphorbia missurica var. petaloidea (Engelm.) Dorn – not accepted
  Euphorbia missurica var. typica L.C. Wheeler – not accepted
  Euphorbia mitchelliana Boiss. – accepted
  Euphorbia mitchelliana var. cairnsiana Domin – not accepted
  Euphorbia mitchelliana var. dietrichiae Domin – not accepted
  Euphorbia mitchelliana var. filifolia Domin – not accepted
  Euphorbia mitchelliana var. glauca Benth. – not accepted
  Euphorbia mitchelliana var. hirta Boiss. – not accepted
  Euphorbia mitchelliana var. oblongifolia Boiss. – not accepted
  Euphorbia mitchelliana var. obtusifolia Domin – not accepted
  Euphorbia mitchelliana var. stenophylla Benth. – not accepted
  Euphorbia mitchelliana var. typica Domin – not accepted
  Euphorbia mitis Pax – not accepted
  Euphorbia mitriformis P.R.O. Bally & S. Carter – accepted
  Euphorbia mixta N.E. Br. – not accepted
  Euphorbia mlanjeana L.C. Leach – accepted
  Euphorbia mocinoi Oudejans – not accepted
  Euphorbia modesta Boiss. – not accepted
  Euphorbia moehringioides Pax – not accepted
  Euphorbia moenchiana Steud. – not accepted
  Euphorbia mohammerensis Boiss. – not accepted
  Euphorbia mollis C.C. Gmel. – not accepted
  Euphorbia momccoyae Lavranos – accepted
  Euphorbia monacantha Pax – accepted
  Euphorbia monadenioides M.G. Gilbert – accepted
  Euphorbia monantha C. Wright ex Boiss. – accepted
  Euphorbia monchiquensis Franco & P. Silva – not accepted
  Euphorbia monensis (Millsp.) Urb. – not accepted
  Euphorbia mongolica (Prokh.) Prokh. – accepted
  Euphorbia monocephala Pax – not accepted
  Euphorbia monocephala Baker ex Denis – not accepted
  Euphorbia monocyathium (Prokh.) Prokh. – accepted
  Euphorbia monostyla Prokh. – accepted
  Euphorbia montana Engelm. – not accepted
  Euphorbia montana var. gracilior Engelm. – not accepted
  Euphorbia montana var. robusta Engelm. – not accepted
  Euphorbia montana var. trifaris Norton – not accepted
  Euphorbia monteiroi Hook. – accepted
  Euphorbia monteiroi ssp. brandbergensis B. Nord. – accepted
  Euphorbia monteiroi ssp. monteiroi Hook. – accepted
  Euphorbia monteiroi ssp. ramosa L.C. Leach – accepted
  Euphorbia montenegrina (Bald.) K. Malý – accepted
  Euphorbia montereyana Millsp. – accepted
  Euphorbia montevidensis Casar. ex Boiss. – not accepted
  Euphorbia montevidensis Klotzsch ex Boiss. – not accepted
  Euphorbia monticola Boiss. – not accepted
  Euphorbia monticola Hochst. ex A. Rich. – not accepted
  Euphorbia moratii Rauh – accepted
  Euphorbia moratii var. antsingiensis Cremers – accepted
  Euphorbia moratii var. bemarahensis Cremers – accepted
  Euphorbia moratii var. moratii Rauh – accepted
  Euphorbia moratii var. multiflora Rauh – accepted
  Euphorbia morinii A. Berger – not accepted
  Euphorbia morisoniana Klotzsch ex Seem. – not accepted
  Euphorbia mosaica P.R.O. Bally & S. Carter – accepted
  Euphorbia mosana Lej. – not accepted
  Euphorbia mossambicensis (Klotzsch & Garcke) Boiss. – accepted
  Euphorbia mossambicensis var. fischeri (Pax) N.E. Br. – not accepted
  Euphorbia mossambicensis var. nyasica N.E. Br. – not accepted
  Euphorbia mossamedensis N.E. Br. – accepted
  Euphorbia mtolohensis Lodé – accepted
  Euphorbia mucronata Lam. – not accepted
  Euphorbia mucronata Lapeyr. – not accepted
  Euphorbia mucronata Clarke – not accepted
  Euphorbia mucronulata (Prokh.) Pavlov – accepted
  Euphorbia muelleri Boiss. – accepted
  Euphorbia mulemae Rendle – not accepted
  Euphorbia multicaulis Thuill. – not accepted
  Euphorbia multicaulis Engelm. – not accepted
  Euphorbia multiceps A. Berger – accepted
  Euphorbia multiclava P.R.O. Bally & S. Carter – accepted
  Euphorbia multiflora Willd. ex Klotzsch – not accepted
  Euphorbia multifolia A.C. White, R.A. Dyer & B. Sloane – accepted
  Euphorbia multifoliosa M.E. Jones – not accepted
  Euphorbia multiformis Gaudich. ex Hook. & Arn. – accepted – variable sandmat
  Euphorbia multiformis Schur – not accepted
  Euphorbia multiformis var. celastroides A. Gray – not accepted
  Euphorbia multiformis var. haleakalana Sherff – not accepted
  Euphorbia multiformis var. kaalana Sherff – not accepted
  Euphorbia multiformis var. kapuleiensis O. Deg. & Sherff – not accepted
  Euphorbia multiformis var. lorifolia A. Gray ex H. Mann – not accepted
  Euphorbia multiformis var. manoana Sherff – not accepted
  Euphorbia multiformis var. microphylla Boiss. – accepted – variable sandmat
  Euphorbia multiformis var. mohihiensis Sherff – not accepted
  Euphorbia multiformis var. multiformis Gaudich. ex Hook. & Arn. – accepted – variable sandmat
  Euphorbia multiformis var. perdita Sherff – not accepted
  Euphorbia multiformis var. sparsiflora (A. Heller) Sherff – not accepted
  Euphorbia multiformis var. tenuior A. Gray ex H. Mann – not accepted
  Euphorbia multiformis var. tomentella Boiss. – not accepted
  Euphorbia multiformis var. typica Sherff – not accepted
  Euphorbia multifurcata Rech. f., Aellen & Esfand. – not accepted
  Euphorbia multinodis Urb. – accepted
  Euphorbia multiradiata Pax & K. Hoffm. – not accepted
  Euphorbia multiramosa Nel – not accepted
  Euphorbia multiseta Benth. – accepted
  Euphorbia mundii N.E. Br. – accepted
  Euphorbia munizii Borhidi – accepted
  Euphorbia muraltioides N.E. Br. – accepted
  Euphorbia muricata Thunb. – accepted
  Euphorbia muricata M. Bieb. – not accepted
  Euphorbia muricata var. wilhelmsiana K. Koch – not accepted
  Euphorbia murielii N.E. Br. – not accepted
  Euphorbia murrayana J.M. Black – not accepted
  Euphorbia muscicola Fernald – accepted
  Euphorbia muscosa Ten. – not accepted
  Euphorbia mwinilungensis L.C. Leach – accepted
  Euphorbia myrioclada S. Carter – accepted
  Euphorbia myrsinites L. – accepted – myrtle spurge, donkey tail, blue spurge, creeping spurge
  Euphorbia myrsinites Pall. ex Ledeb. – not accepted
  Euphorbia myrsinites ssp. litardierei Font Quer & Garcias Font – not accepted
  Euphorbia myrsinites ssp. pontica (Prokh.) R. Turner – not accepted
  Euphorbia myrsinites ssp. rechingeri (Greuter) Aldén – not accepted
  Euphorbia myrtifolia Hook. & Arn. – not accepted
  Euphorbia myrtifolia (L.) Lam. – not accepted
  Euphorbia myrtillifolia L. – accepted
  Euphorbia myrtilloides Schltdl. ex Klotzsch & Garcke – not accepted
  Euphorbia myrtoides Boiss. – not accepted
  Euphorbia nagleri (Klotzsch & Garcke) Boiss. – accepted
  Euphorbia nagleri var. baliensis Boiss. – not accepted
  Euphorbia nakaiana H. Lév. – not accepted
  Euphorbia nakaii Hurus. – accepted
  Euphorbia namaquensis N.E. Br. – accepted
  Euphorbia namibensis Marloth – accepted
  Euphorbia namuliensis Bruyns – accepted
  Euphorbia namuskluftensis L.C. Leach – accepted
  Euphorbia nana Royle – accepted
  Euphorbia nana Klotzsch ex Boiss. – not accepted
  Euphorbia napoides Pax – accepted
  Euphorbia natalensis Bernh. ex Krauss – accepted
  Euphorbia nayarensis V.W. Steinm. – accepted
  Euphorbia ndurumensis P.R.O. Bally – not accepted
  Euphorbia nealleyi J.M. Coult. & Fisher – not accepted
  Euphorbia neapolitana Ten. – not accepted
  Euphorbia nebrownii Merr. – not accepted
  Euphorbia neglecta N.E. Br. – not accepted
  Euphorbia negromontana N.E. Br. – accepted
  Euphorbia neilmulleri M.C. Johnst. – accepted
  Euphorbia nelii A.C. White, R.A. Dyer & B. Sloane – not accepted
  Euphorbia nelsii Pax – not accepted
  Euphorbia nelsonii Millsp. – not accepted
  Euphorbia nematocypha Hand.-Mazz. – not accepted
  Euphorbia nematocypha var. induta Hand.-Mazz. – not accepted
  Euphorbia nemoralis Salisb. – not accepted
  Euphorbia nemoralis Kit. – not accepted
  Euphorbia nemoralis Darl. – not accepted
  Euphorbia nenensis Hiern – not accepted
  Euphorbia neoangolensis Bruyns – accepted
  Euphorbia neoarborescens Bruyns – accepted
  Euphorbia neobosseri (Rauh) Rauh – accepted
  Euphorbia neobosseri var. itampolensis Rauh – accepted
  Euphorbia neobosseri var. neobosseri (Rauh) Rauh – accepted
  Euphorbia neocaledonica Boiss. – accepted
  Euphorbia neocapitata Bruyns – accepted
  Euphorbia neochamaeclada Bruyns – accepted
  Euphorbia neococcinea Bruyns – accepted
  Euphorbia neocrispa Bruyns – accepted
  Euphorbia neocymosa Bruyns – accepted
  Euphorbia neoerubescens Bruyns – not accepted
  Euphorbia neogillettii Bruyns – accepted
  Euphorbia neoglabrata Bruyns – accepted
  Euphorbia neoglaucescens Bruyns – accepted
  Euphorbia neogoetzei Bruyns – accepted
  Euphorbia neogossweileri Bruyns – accepted
  Euphorbia neogracilis Bruyns – accepted
  Euphorbia neohalipedicola Bruyns – accepted
  Euphorbia neohumbertii Boiteau – accepted
  Euphorbia neohumbertii var. aureoviridiflora Rauh – not accepted
  Euphorbia neokaessneri Bruyns – accepted
  Euphorbia neomexicana Greene – not accepted
  Euphorbia neomontana Bruyns – accepted
  Euphorbia neoparviflora Bruyns – accepted
  Euphorbia neopedunculata Bruyns – accepted
  Euphorbia neopolycnemoides Pax & K. Hoffm. – accepted
  Euphorbia neoreflexa Bruyns – accepted
  Euphorbia neorubella Bruyns – accepted
  Euphorbia neorugosa Bruyns – accepted
  Euphorbia neospinescens Bruyns – accepted
  Euphorbia neostapelioides Bruyns – not accepted
  Euphorbia neostapelioides var. congesta Bruyns – not accepted
  Euphorbia neostolonifera Bruyns – accepted
  Euphorbia neovirgata Bruyns – accepted
  Euphorbia neovolkensii Pax – not accepted
  Euphorbia nepalensis Boiss. – not accepted
  Euphorbia nephradenia Barneby – accepted – Paria spurge, Utah spurge
  Euphorbia nereidum Jahand. & Maire – accepted
  Euphorbia neriifolia L. – accepted – Indian spurgetree
  Euphorbia neriifolia Roxb. – not accepted
  Euphorbia nervosa Kit. – not accepted
  Euphorbia nesemannii R.A. Dyer – accepted
  Euphorbia nesiotica B.L. Rob. – not accepted
  Euphorbia nesomii Mayfield – accepted
  Euphorbia neutra A. Berger – not accepted
  Euphorbia nevadensis Boiss. & Reut. – accepted
  Euphorbia nevadensis ssp. aragonensis (Loscos & Pardo) O. Bolňs & Vigo – accepted
  Euphorbia nevadensis ssp. bolosii Molero & Rovira – accepted
  Euphorbia nevadensis ssp. nevadensis Boiss. & Reut. – accepted
  Euphorbia nevadensis var. acutifolia (Lange) O. Bolňs & Vigo – not accepted
  Euphorbia nevadensis var. aragonensis (Loscos & Pardo) O. Bolňs & Vigo – not accepted
  Euphorbia nevadensis var. carpetana Pau ex Losa – not accepted
  Euphorbia nevadensis var. granatensis Ladero & Valdés Berm. – not accepted
  Euphorbia nicaeensis All. – accepted
  Euphorbia nicaeensis f. latibracteata (Prodán) Kuzmanov – not accepted
  Euphorbia nicaeensis f. varnensis (Velen.) Kuzmanov – not accepted
  Euphorbia nicaeensis ssp. cadrilateri (Prodán) Kuzmanov – accepted
  Euphorbia nicaeensis ssp. demnatensis (Coss. ex Batt. & Trab.) Breistr. – accepted
  Euphorbia nicaeensis ssp. dobrogensis (Prodán) Kuzmanov – accepted
  Euphorbia nicaeensis ssp. goldei (Prokh.) Greuter & Burdet – accepted
  Euphorbia nicaeensis ssp. hispanica Degen & Hervier – not accepted
  Euphorbia nicaeensis ssp. japygica (Ten.) Arcang. – not accepted
  Euphorbia nicaeensis ssp. maleevii (Tamamsch.) Oudejans – not accepted
  Euphorbia nicaeensis ssp. nicaeensis All. – accepted
  Euphorbia nicaeensis ssp. prostrata (Fiori) Arrigoni – not accepted
  Euphorbia nicaeensis ssp. stepposa (Zoz) Greuter & Burdet – not accepted
  Euphorbia nicaeensis ssp. volgensis (Krysht.) Oudejans – accepted
  Euphorbia nicaeensis var. hispanica (Degen & Hervier) Cuatrec. – accepted
  Euphorbia nicaeensis var. japygica (Ten.) Nyman – not accepted
  Euphorbia nicaeensis var. lasiocarpa (Boiss.) Radcl.-Sm. & Govaerts – accepted
  Euphorbia nicaeensis var. nicaeensis All. – accepted
  Euphorbia nicholasii Oudejans – accepted
  Euphorbia niciciana Borbás ex Novák – accepted
  Euphorbia nigrispina N.E. Br. – accepted
  Euphorbia nigrispinoides M.G. Gilbert – accepted
  Euphorbia nilagirica Miq. – not accepted
  Euphorbia nipensis Carabia – not accepted
  Euphorbia niqueroana Urb. – not accepted
  Euphorbia nirurioides (Millsp.) Fawc. & Rendle – not accepted
  Euphorbia nitens Trevir. – not accepted
  Euphorbia nivulia Buch.-Ham. – accepted
  Euphorbia nivulia var. helicothele (Lem.) Boiss. – not accepted
  Euphorbia nocens (L.C. Wheeler) V.W. Steinm. – accepted
  Euphorbia nodiflora Steud. – not accepted
  Euphorbia nodosa Houtt. – accepted
  Euphorbia nodosa N.E. Br. – not accepted
  Euphorbia noeana Boiss. – not accepted
  Euphorbia nogalensis (A. Hässl.) S. Carter – accepted
  Euphorbia norfolkiana Boiss. – accepted
  Euphorbia normannii Schmalh. ex Lipsky – accepted
  Euphorbia nortoniana A. Nelson – not accepted
  Euphorbia notadenia Boiss. & Hohen. – not accepted
  Euphorbia notata Engelm. ex Boiss. – not accepted
  Euphorbia notoptera Boiss. – accepted
  Euphorbia novomexicana (Klotzsch & Garcke) L.C. Wheeler – not accepted
  Euphorbia noxia Pax – accepted
  Euphorbia nubica N.E. Br. – accepted
  Euphorbia nubigena L.C. Leach – accepted
  Euphorbia nubigena var. nubigena L.C. Leach – accepted
  Euphorbia nubigena var. rutilans L.C. Leach – accepted
  Euphorbia nuda (Velen.) Velen. – not accepted
  Euphorbia nuda Lam. ex Pers. – not accepted
  Euphorbia nudicaulis Chapm. – not accepted – Chapman's spurge
  Euphorbia nudiflora Lam. – not accepted
  Euphorbia nudiflora Jacq. – not accepted
  Euphorbia nummularia Hook. f. – accepted
  Euphorbia nummularia var. glabra B.L. Rob. & Greenm. – not accepted
  Euphorbia nummulariifolia Willd. – not accepted
  Euphorbia nurae P. Fraga & Rossello – accepted
  Euphorbia nusbaumeri X. Aubriot & Lowry – accepted
  Euphorbia nutans Lag. – accepted – eyebane, upright spotted spurge, nodding spurge
  Euphorbia nutans var. glaberrima Thell. – not accepted
  Euphorbia nuttallii (Engelm.) Small – not accepted
  Euphorbia nyassae Pax – accepted
  Euphorbia nyassae ssp. mentiens S. Carter – not accepted
  Euphorbia nyikae Pax ex Engl. – accepted
  Euphorbia nyikae var. neovolkensii (Pax) S. Carter – accepted
  Euphorbia nyikae var. nyikae Pax ex Engl. – accepted
  Euphorbia oahuensis Skottsb. – not accepted
  Euphorbia oatesii Rolfe – accepted
  Euphorbia oaxacana B.L. Rob. & Greenm. – accepted
  Euphorbia obconica Bojer ex N.E. Br. – accepted
  Euphorbia obcordata Balf. f. – accepted
  Euphorbia obcordata Denis – not accepted
  Euphorbia obesa Hook. f. – accepted
  Euphorbia obesa ssp. obesa Hook. f. – accepted
  Euphorbia obesa ssp. symmetrica (A.C. White, R.A. Dyer & B. Sloane) G.D. Rowley – accepted
  Euphorbia obliqua F.A. Bauer ex Endl. – accepted
  Euphorbia obliqua var. phyllanthoides (Boiss.) Boiss. – not accepted
  Euphorbia obliquata Forssk. – not accepted
  Euphorbia obliquifolia Kunze ex Boiss. – not accepted
  Euphorbia obliterata Jacq. – not accepted
  Euphorbia oblongata Griseb. – accepted – eggleaf spurge, oblong spurge, egg-leaf spurge
  Euphorbia oblongata ssp. sessiliflora (Boiss.) Nyman – not accepted
  Euphorbia oblongata var. oblongata Griseb. – accepted
  Euphorbia oblongata var. sessiliflora Boiss. – accepted
  Euphorbia oblongicaulis Baker – not accepted
  Euphorbia oblongifolia (K. Koch) K. Koch – accepted
  Euphorbia obovalifolia A. Rich. – not accepted
  Euphorbia obovata Decne. – accepted
  Euphorbia obscura Loisel. – not accepted
  Euphorbia obscura Láng ex Rchb. – not accepted
  Euphorbia obtusata Pursh – not accepted
  Euphorbia obtusifolia Lam. – not accepted
  Euphorbia obtusifolia Poir. – not accepted
  Euphorbia obtusifolia f. barbaricensis Pedro – not accepted
  Euphorbia obtusifolia f. latibracteata G. Kunkel – not accepted
  Euphorbia obtusifolia f. sesimbrensis Pedro – not accepted
  Euphorbia obtusifolia ssp. regis-jubae (Webb & Berthel.) Maire – not accepted
  Euphorbia obtusifolia var. despoliata Menezes – not accepted
  Euphorbia obtusifolia var. wildpretii Molero & Rovira – not accepted
  Euphorbia occidentalis Drew – not accepted
  Euphorbia occidentaustralica Radcl.-Sm. & Govaerts – accepted
  Euphorbia occulta Klotzsch – not accepted
  Euphorbia ocellata Durand & Hilg. – accepted – Contura Creek sandmat
  Euphorbia ocellata ssp. arenicola (Parish) Oudejans – accepted – Contura Creek sandmat, Yellow-flowered sandmat
  Euphorbia ocellata ssp. ocellata Durand & Hilg. – accepted – Contura Creek sandmat
  Euphorbia ocellata ssp. rattanii (S. Watson) Oudejans – accepted – Rattan's sandmat
  Euphorbia ocellata var. arenicola (Parish) Jeps. – not accepted
  Euphorbia ocellata var. kirbyi J.T. Howell – not accepted
  Euphorbia ocellata var. rattanii (S. Watson) L.C. Wheeler – not accepted
  Euphorbia ocellata var. sulfurea (Millsp.) Jeps. – not accepted
  Euphorbia ocellata var. typica L.C. Wheeler – not accepted
  Euphorbia octoradiata H. Lév. & Vaniot – accepted
  Euphorbia ocymoidea L. – accepted
  Euphorbia ocymoidea var. barnesii (Millsp.) McVaugh – not accepted
  Euphorbia ocymoidea var. subreniformis (S. Watson) McVaugh – not accepted
  Euphorbia odontadenia Boiss. – not accepted – Segi Canyon spurge
  Euphorbia odontophora S. Carter – accepted
  Euphorbia odontophylla Willd. – not accepted
  Euphorbia odontophylla Boiss. – not accepted
  Euphorbia oerstediana (Klotzsch & Garcke) Boiss. – accepted – West Indian spurge
  Euphorbia officinarum L. – accepted
  Euphorbia officinarum Hochst. ex Boiss. – not accepted
  Euphorbia officinarum ssp. beaumieriana (Hook. f. & Coss.) Vindt – accepted
  Euphorbia officinarum ssp. echinus (Hook. f. & Coss.) Vindt – accepted
  Euphorbia officinarum ssp. officinarum L. – accepted
  Euphorbia officinarum var. beaumieriana (Hook. f. & Coss.) Maire – not accepted
  Euphorbia officinarum var. genuina Maire – not accepted
  Euphorbia officinarum var. hernandez-pachecoi (Caball.) Oudejans – not accepted
  Euphorbia officinarum var. kolquall Willd. – not accepted
  Euphorbia ogadenensis P.R.O. Bally & S. Carter – accepted
  Euphorbia ohiotica Steud. & Hochst. ex Boiss. – not accepted
  Euphorbia oidorrhiza Pojark. – accepted
  Euphorbia oleifolia Pourr. – not accepted
  Euphorbia oleifolia Gouan – not accepted
  Euphorbia oleracea Pers. – not accepted
  Euphorbia oligantha Boiss. – not accepted
  Euphorbia oligoclada L.C. Leach – accepted
  Euphorbia olivacea Small – not accepted
  Euphorbia olowaluana Sherff – accepted – alpine sandmat
  Euphorbia olowaluana var. gracilis (Rock) Sherff – not accepted
  Euphorbia olowaluana var. lepidofolia O. Deg. & Sherff – not accepted
  Euphorbia olowaluana var. typica Sherff – not accepted
  Euphorbia omariana M.G. Gilbert – accepted
  Euphorbia oncoclada Drake – not accepted
  Euphorbia onoi Franch. & Sav. – not accepted
  Euphorbia opaca Láng ex Rchb. – not accepted
  Euphorbia operta Halford & W.K. Harris – accepted
  Euphorbia ophiolitica (P.I. Forst.) Y. Yang – accepted
  Euphorbia ophthalmica Pers. – accepted – Florida hammock sandmat
  Euphorbia oppositifolia McVaugh – accepted
  Euphorbia opuntioides Welw. ex Hiern – accepted
  Euphorbia orabensis Dinter – not accepted
  Euphorbia oranensis (Croizat) Subils – accepted
  Euphorbia oraria F. Muell. ex Boiss. – not accepted
  Euphorbia orbiculata Kunth – accepted
  Euphorbia orbiculata Miq. – not accepted
  Euphorbia orbiculata var. jawaharii Rajagopal & Panigrahi – not accepted
  Euphorbia orbiculifolia S. Carter – accepted
  Euphorbia orbifolia (Alain) Oudejans – accepted – Mona Island sandmat
  Euphorbia oreophila Miq. – not accepted
  Euphorbia oreophila var. pubescens Boiss. – not accepted
  Euphorbia oreophila var. wightiana (Boiss.) Boiss. – not accepted
  Euphorbia orientalis L. – accepted
  Euphorbia orientalis (Boiss.) Velen. – not accepted
  Euphorbia origanoides L. – accepted
  Euphorbia orizabae Boiss. – accepted
  Euphorbia orjeni Beck – accepted
  Euphorbia ornata Stapf – not accepted
  Euphorbia orobanchoides (P.R.O. Bally) Bruyns – accepted
  Euphorbia orobanchoides var. calycina (P.R.O. Bally) Bruyns – accepted
  Euphorbia orobanchoides var. orobanchoides (P.R.O. Bally) Bruyns – accepted
  Euphorbia orphanidis Boiss. – accepted
  Euphorbia orthoclada Baker – accepted
  Euphorbia oschtenica Galushko – not accepted
  Euphorbia osyridea Boiss. – accepted
  Euphorbia osyridiformis Parsa – accepted
  Euphorbia otjingandu Swanepoel – accepted
  Euphorbia otjipembana L.C. Leach – accepted
  Euphorbia ouachitana Mayfield – accepted
  Euphorbia ovalifolia Kostel. – not accepted
  Euphorbia ovalifolia (Engelm. ex Klotzsch) Boiss. – not accepted
  Euphorbia ovalifolia var. argentina Müll. Arg. ex Griseb. – not accepted
  Euphorbia ovalifolia var. dentata R.E. Fr. – not accepted
  Euphorbia ovalifolia var. montevidensis Boiss. – not accepted
  Euphorbia ovalifolia var. schizosepala Engelm. ex Boiss. – not accepted
  Euphorbia ovalleana Phil. – accepted
  Euphorbia ovata (E. Mey. ex Klotzsch & Garcke) Boiss. – accepted
  Euphorbia ovata Larrańaga – not accepted
  Euphorbia oxycoccoides Boiss. – accepted
  Euphorbia oxyodonta Boiss. – accepted
  Euphorbia oxyphylla Boiss. – accepted
  Euphorbia oxystegia Boiss. – accepted
  Euphorbia pachyceras Coss. ex Lacaita – not accepted
  Euphorbia pachyclada S. Carter – accepted
  Euphorbia pachypoda Urb. – not accepted
  Euphorbia pachypodioides Boiteau – accepted
  Euphorbia pachyrrhiza Kar. & Kir. – accepted
  Euphorbia pachysantha Baill. – accepted
  Euphorbia padifolia (L.) Guss. – not accepted
  Euphorbia padifolia Brandegee – not accepted
  Euphorbia paganorum A. Chev. – accepted
  Euphorbia palatinata F. Zimmerm. ex Thell. & F. Zimmerm. – not accepted
  Euphorbia pallasiana Turcz. ex Fisch. & E.H. Mey. – not accepted
  Euphorbia pallasii Turcz. – not accepted
  Euphorbia pallasii f. glaberrima (Maxim.) Kitag. – not accepted
  Euphorbia pallasii var. glaberrima Maxim. – not accepted
  Euphorbia pallasii var. komaroviana (Prokh.) Y.C. Zhu – not accepted
  Euphorbia pallasii var. pilosa Regel – not accepted
  Euphorbia pallens Dillwyn – not accepted
  Euphorbia pallida Willd. – not accepted
  Euphorbia palmeri Engelm. ex S. Watson – not accepted – wood spurge, woodland spurge
  Euphorbia palmeri var. palmeri Engelm. ex S. Watson – not accepted – woodland spurge
  Euphorbia palmeri var. peplofolia Norton – not accepted
  Euphorbia palmeri var. subpubens (Engelm. ex S. Watson) L.C. Wheeler – not accepted – woodland spurge
  Euphorbia palmyrena Mouterde – not accepted
  Euphorbia paludicola McVaugh – not accepted
  Euphorbia paludosa Rouy – not accepted
  Euphorbia palustris L. – accepted – marsh spurge
  Euphorbia palustris var. brinonense Cezard – not accepted
  Euphorbia pamirica (Prokh.) Prokh. – accepted
  Euphorbia pampeana Speg. – accepted
  Euphorbia panacea Webb & Berthel. – not accepted
  Euphorbia pancheri Baill. – accepted
  Euphorbia pancicii Beck – accepted
  Euphorbia pandurata Huber – not accepted
  Euphorbia pandurifolia Roth – not accepted
  Euphorbia paniculata Elliott – not accepted
  Euphorbia paniculata Desf. – accepted
  Euphorbia paniculata ssp. monchiquensis (Franco & P. Silva) Vicens, Molero & C. Blanché – accepted
  Euphorbia paniculata ssp. paniculata Desf. – accepted
  Euphorbia paniculata ssp. welwitschii (Boiss. & Reut.) Vicens, Molero & C. Blanché – accepted
  Euphorbia panjutinii Grossh. – accepted
  Euphorbia pannonica Host – accepted
  Euphorbia pannonica f. kitaibelii Soó – not accepted
  Euphorbia pantomalaca Standl. & Steyerm. – not accepted
  Euphorbia papilionum S. Carter – accepted
  Euphorbia papillaris (Boiss.) Raffaelli & Ricceri – accepted
  Euphorbia papilligera Boiss. – not accepted
  Euphorbia papillosa A. St.-Hil. – accepted
  Euphorbia papillosa Pouzolz ex Gren. & Godr. – not accepted
  Euphorbia papillosa var. cabrerae Subils – not accepted
  Euphorbia papillosa var. erythrorrhiza (Klotzsch & Garcke) Subils – not accepted
  Euphorbia papillosa var. minor A. St.-Hil. – not accepted
  Euphorbia papillosicapsa L.C. Leach – accepted
  Euphorbia paralias L. – accepted – sea spurge
  Euphorbia paranensis Dusén – accepted
  Euphorbia parannaquensis Blanco – not accepted
  Euphorbia parasitica Pav. ex Boiss. – not accepted
  Euphorbia parciflora Urb. – accepted
  Euphorbia parciramulosa Schweinf. – accepted
  Euphorbia paredonensis (Millsp.) Oudejans – accepted
  Euphorbia parifolia N.E. Br. – accepted
  Euphorbia parishii Greene – accepted – Parish's sandmat
  Euphorbia parkeri Binojk. & N.P. Balakr. – accepted
  Euphorbia parodii Oudejans – accepted
  Euphorbia parryi Engelm. – accepted – Parry's sandmat, dune spurge
  Euphorbia parva N.E. Br. – accepted
  Euphorbia parvicaruncula D.C. Hassall – accepted
  Euphorbia parviceps L.C. Leach – accepted
  Euphorbia parvicyathophora Rauh – accepted
  Euphorbia parviflora L. – accepted
  Euphorbia parvifolia E. Mey. ex Boiss. – not accepted
  Euphorbia parvifolia var. laxa Boiss. – not accepted
  Euphorbia parvimamma Boiss. – not accepted
  Euphorbia parvula Delile – not accepted
  Euphorbia parvula K. Koch – not accepted
  Euphorbia passa N.E. Br. – not accepted
  Euphorbia patagonica Hieron. – not accepted
  Euphorbia patellifera J.T. Howell – not accepted
  Euphorbia patens Kit. – not accepted
  Euphorbia patentispina S. Carter – accepted
  Euphorbia patula Mill. – accepted
  Euphorbia pauciflora Nutt. ex Seem. – not accepted
  Euphorbia pauciflora Dufour – not accepted
  Euphorbia paucifolia Klotzsch – not accepted
  Euphorbia paucipila Urb. – not accepted
  Euphorbia pauciradiata Blatt. – accepted
  Euphorbia paui Lacaita ex Losa – not accepted
  Euphorbia paulianii Ursch & Leandri – accepted
  Euphorbia paxiana Dinter – not accepted
  Euphorbia pearsonii N.E. Br. – not accepted
  Euphorbia pectinata Albov – not accepted
  Euphorbia pedemontana L.C. Leach – accepted
  Euphorbia pedersenii Subils – accepted
  Euphorbia pediculifera Engelm. – accepted – Carrizo Mountain sandmat
  Euphorbia pediculifera var. abramsiana (L.C. Wheeler) Ewan – not accepted
  Euphorbia pediculifera var. inornata Brandegee – not accepted
  Euphorbia pediculifera var. involuta (Millsp.) I.M. Johnst. – not accepted
  Euphorbia pediculifera var. linearifolia S. Watson – accepted
  Euphorbia pediculifera var. minor Millsp. – not accepted
  Euphorbia pediculifera var. pediculifera Engelm. – accepted
  Euphorbia pediculifera var. typica L.C. Wheeler – not accepted
  Euphorbia pedilanthoides Denis – accepted
  Euphorbia pedroi Molero & Rovira – accepted
  Euphorbia pedunculata Klotzsch ex Jabl. – not accepted
  Euphorbia pedunculosa A. Rich. – not accepted
  Euphorbia peganoides Boiss. – not accepted
  Euphorbia pekinensis Rupr. – accepted
  Euphorbia pekinensis f. denudata (Hurus.) Oudejans – not accepted
  Euphorbia pekinensis f. sinanensis Hurus. – not accepted
  Euphorbia pekinensis ssp. asoensis Kuros. & Ohashi – accepted
  Euphorbia pekinensis ssp. fauriei (H. Lév. & Vaniot) Kuros. & Ohashi – not accepted
  Euphorbia pekinensis ssp. pekinensis Rupr. – accepted
  Euphorbia pekinensis var. acuminata Hurus. – not accepted
  Euphorbia pekinensis var. hupehensis Hurus. – not accepted
  Euphorbia pekinensis var. ibukiensis Hurus. – not accepted
  Euphorbia pekinensis var. japonensis Makino – not accepted
  Euphorbia pekinensis var. lasiocaula (Boiss.) Oudejans – not accepted
  Euphorbia pekinensis var. onoi (Franch. & Sav.) Makino – not accepted
  Euphorbia pekinensis var. pseudolucorum (Hurus.) Oudejans – not accepted
  Euphorbia pekinensis var. sinanensis (Hurus.) Oudejans – not accepted
  Euphorbia pekinensis var. subulatifolius (Hurus.) T.B. Lee – not accepted
  Euphorbia pekinensis var. watanabei (Makino) Oudejans – not accepted
  Euphorbia pellegrinii Leandri – accepted
  Euphorbia peltata Roxb. – accepted
  Euphorbia peltata Sessé & Moç. – not accepted
  Euphorbia peltigera E. Mey. ex Boiss. – not accepted
  Euphorbia penicillata (Millsp.) R.E. Schult. – not accepted
  Euphorbia peninsularis I.M. Johnst. – accepted
  Euphorbia pentadactyla Griseb. – accepted
  Euphorbia pentagona Haw. – accepted
  Euphorbia pentagona Royle – not accepted
  Euphorbia pentagona Blanco – not accepted
  Euphorbia pentagona Noronha – not accepted
  Euphorbia pentlandii Boiss. – accepted
  Euphorbia pentops Marloth ex A.C. White, R.A. Dyer & B. Sloane – accepted
  Euphorbia peperomioides Boiss. – accepted
  Euphorbia peplidion Engelm. – accepted – low spurge
  Euphorbia peplis L. – accepted
  Euphorbia peplofolia Engelm. ex Patt. – not accepted
  Euphorbia peploides Gouan – not accepted
  Euphorbia peploides Nutt. – not accepted
  Euphorbia peplus L. – accepted – petty spurge
  Euphorbia peplus var. maritima Boiss. – not accepted
  Euphorbia peplus var. minima DC. – accepted
  Euphorbia peplus var. minor Willd. – not accepted
  Euphorbia peplus var. peploides (Gouan) Vis. – not accepted
  Euphorbia peplus var. peplus L. – accepted
  Euphorbia perangusta R.A. Dyer – accepted
  Euphorbia perangustifolia S. Carter – accepted
  Euphorbia perarmata S. Carter – accepted
  Euphorbia perbracteata Gage – accepted
  Euphorbia perennans (Shinners) Warnock & M.C. Johnst. – accepted – perennial sandmat, Terlingua spurge
  Euphorbia pereskiifolia Houllet ex Baill. – accepted
  Euphorbia perfoliata Scheutz – accepted
  Euphorbia perforata Guss. – not accepted
  Euphorbia perforata Tineo ex Lojac. – not accepted
  Euphorbia pergamena Small – accepted – Southern Florida sandmat, rocklands spurge
  Euphorbia pergracilis P.G. Mey. – accepted
  Euphorbia peritropoides (Millsp.) V.W. Steinm. – accepted
  Euphorbia perlignea McVaugh – accepted
  Euphorbia perpera N.E. Br. – accepted
  Euphorbia perplexa L.C. Leach – accepted
  Euphorbia perplexa var. kasamana L.C. Leach – accepted
  Euphorbia perplexa var. perplexa L.C. Leach – accepted
  Euphorbia perrieri Drake – accepted
  Euphorbia perrieri var. elongata Denis – accepted
  Euphorbia perrieri var. perrieri Drake – accepted
  Euphorbia perrottetii Jaub. & Spach – not accepted
  Euphorbia persepolitana Boiss. – not accepted
  Euphorbia persica Steven ex Boiss. – not accepted
  Euphorbia persica C.A. Mey. ex Boiss. – not accepted
  Euphorbia persistens R.A. Dyer – not accepted
  Euphorbia persistentifolia L.C. Leach – accepted
  Euphorbia personata (Croizat) V.W. Steinm. – accepted
  Euphorbia peruviana L.C. Wheeler – accepted
  Euphorbia pervilleana Baill. – accepted
  Euphorbia pervittata S. Carter – accepted
  Euphorbia pestalozzae Boiss. – accepted
  Euphorbia petala Ewart & L.R. Kerr – not accepted
  Euphorbia petaloidea Engelm. – not accepted
  Euphorbia petaloidea var. flagelliformis Engelm. – not accepted
  Euphorbia petaloidea var. intermedia Engelm. – not accepted
  Euphorbia petaloidea var. nicolletii Engelm. – not accepted
  Euphorbia petaloidea var. nuttallii Engelm. – not accepted
  Euphorbia petaloides G. Don – not accepted
  Euphorbia petiolaris Sims – accepted – manchineel berry
  Euphorbia petiolata Banks & Sol. – accepted
  Euphorbia petiolata var. petiolata Banks & Sol. – accepted
  Euphorbia petiolata var. postii (Boiss.) Radcl.-Sm. – accepted
  Euphorbia petitiana A. Rich. – accepted
  Euphorbia petraea S. Carter – accepted
  Euphorbia petricola P.R.O. Bally & S. Carter – accepted
  Euphorbia petrina S. Watson – accepted
  Euphorbia petrophila C.A. Mey. – accepted
  Euphorbia petrophila var. armena Boiss. – not accepted
  Euphorbia petrophila var. colchica Litv. – not accepted
  Euphorbia phanerophlebias Baker ex Denis – not accepted
  Euphorbia philippiana (Klotzsch & Garcke) Boiss. – accepted
  Euphorbia philippina J. Gay ex Boiss. – not accepted
  Euphorbia phillipsiae N.E. Br. – accepted
  Euphorbia phillipsioides S. Carter – accepted
  Euphorbia philora (Cockerell) Tidestr. – not accepted
  Euphorbia phlomos Candargy – not accepted
  Euphorbia phosphorea Mart. – accepted
  Euphorbia phyllanthoides Boiss. – not accepted
  Euphorbia phylloclada Boiss. – accepted
  Euphorbia phymatoclada Boiss. – not accepted
  Euphorbia phymatosperma Boiss. & Gaill. – accepted
  Euphorbia phymatosperma ssp. cernua (Coss. & Durieu ex Boiss.) Vindt – accepted
  Euphorbia phymatosperma ssp. phymatosperma Boiss. & Gaill. – accepted
  Euphorbia physalifolia Boiss. – not accepted
  Euphorbia physocaulos Mouterde – accepted
  Euphorbia physoclada Boiss. – accepted
  Euphorbia picachensis Brandegee – accepted
  Euphorbia piceoides Thulin – accepted
  Euphorbia picta Jacq. – not accepted
  Euphorbia pileoides Millsp. – not accepted
  Euphorbia pillansii N.E. Br. – accepted
  Euphorbia pilosa L. – accepted
  Euphorbia pilosa Pursh – not accepted
  Euphorbia pilosa ssp. ojensis Stepanov – not accepted
  Euphorbia pilosa ssp. villosa (Waldst. & Kit. ex Willd.) Nyman – not accepted
  Euphorbia pilosa var. austriaca (A. Kern.) Nyman – not accepted
  Euphorbia pilosa var. illirica (Lam.) Nyman – not accepted
  Euphorbia pilosa var. longifolia Rouy – not accepted
  Euphorbia pilosa var. procera (M. Bieb.) Nyman – not accepted
  Euphorbia pilosa var. reichenbachiana (Willk.) Boiss. – not accepted
  Euphorbia pilosa var. trigonocarpa (Fisch.) Boiss. – not accepted
  Euphorbia pilosa var. villosa (Waldst. & Kit. ex Willd.) Nyman – not accepted
  Euphorbia pilosissima S. Carter – accepted
  Euphorbia pilosula Engelm. ex Boiss. – not accepted
  Euphorbia pilulifera auct. non L. – not accepted
  Euphorbia pilulifera L. – not accepted
  Euphorbia pilulifera f. humifusa Domin – not accepted
  Euphorbia pilulifera f. rubromaculata Domin – not accepted
  Euphorbia pilulifera f. viridis Domin – not accepted
  Euphorbia pilulifera var. arechavaletae Herter – not accepted
  Euphorbia pilulifera var. discolor Engelm. – not accepted
  Euphorbia pilulifera var. glabrescens Thell. – not accepted
  Euphorbia pilulifera var. guaranitica Chodat & Hassl. – not accepted
  Euphorbia pilulifera var. hirta (L.) Thell. – not accepted
  Euphorbia pilulifera var. obliterata (Jacq.) Hitchc. – not accepted
  Euphorbia pilulifera var. procumbens Boiss. – not accepted
  Euphorbia pimeleodendron Pax – not accepted
  Euphorbia pinariona Urb. – not accepted
  Euphorbia pindicola Hausskn. – not accepted
  Euphorbia pinea L. – not accepted
  Euphorbia pinea ssp. celerieri Emb. – not accepted
  Euphorbia pinea var. azorica (Hochst.) Boiss. – not accepted
  Euphorbia pinetorum (Small) G.L. Webster – accepted – pineland spurge
  Euphorbia pinetorum (Small) Jabl. – not accepted
  Euphorbia pinetorum Dubovik – not accepted
  Euphorbia pinifolia Lam. – not accepted
  Euphorbia pinifolia Willd. – not accepted
  Euphorbia pinkavana M.C. Johnst. – accepted
  Euphorbia pinnulosa Lojac. – not accepted
  Euphorbia pinus H. Lév. – not accepted
  Euphorbia pionosperma V.W. Steinm. & Felger – accepted
  Euphorbia pirahazo Jum. – not accepted
  Euphorbia pirottae N. Terrac. – accepted
  Euphorbia piscatoria Aiton – accepted
  Euphorbia piscidermis M.G. Gilbert – accepted
  Euphorbia pisidica Hub.-Mor. & M.S. Khan – accepted
  Euphorbia pistiifolia Boiss. – not accepted
  Euphorbia pitcairnensis F. Br. – not accepted
  Euphorbia pithyusa L. – accepted
  Euphorbia pithyusa ssp. cupanii (Guss. ex Bertol.) Radcl.-Sm. – accepted
  Euphorbia pithyusa ssp. pithyusa L. – accepted
  Euphorbia pithyusa var. dianthifolia (Lojac.) Oudejans – not accepted
  Euphorbia pithyusa var. procera Gren. & Godr. – not accepted
  Euphorbia plagiantha Drake – accepted
  Euphorbia planiticola D.C. Hassall – accepted
  Euphorbia platyacantha Drake – not accepted
  Euphorbia platyacantha Pax – not accepted
  Euphorbia platycephala Pax – accepted
  Euphorbia platyclada Rauh – accepted
  Euphorbia platyclada var. hardyi Rauh – accepted
  Euphorbia platyclada var. platyclada Rauh – accepted
  Euphorbia platylepis Decne. – not accepted
  Euphorbia platymammillaris Croizat – not accepted
  Euphorbia platyphylla L. – not accepted
  Euphorbia platyphyllos L. – accepted – broadleaf spurge
  Euphorbia platyphyllos ssp. flavopurpurea (Willk.) Nyman – not accepted
  Euphorbia platyphyllos ssp. literata (Jacq.) Holub – accepted
  Euphorbia platyphyllos ssp. platyphyllos L. – accepted
  Euphorbia platyphyllos var. literata (Jacq.) W. Koch – not accepted
  Euphorbia platyphyllos var. subciliata (Pers.) Nyman – not accepted
  Euphorbia platyrrhiza L.C. Leach – accepted
  Euphorbia platysperma Engelm. ex S. Watson – accepted – flatseed sandmat, flat-seeded spurge, dune spurge
  Euphorbia plebeia Boiss. – accepted
  Euphorbia plenispina S. Carter – accepted
  Euphorbia plicata S. Watson – not accepted
  Euphorbia plumerioides Teijsm. ex Hassk. – accepted
  Euphorbia plumerioides var. acuminata J.J. Sm. – not accepted
  Euphorbia plumerioides var. homochroa Boiss. – not accepted
  Euphorbia plumerioides var. macrocarpa Radcl.-Sm. – not accepted
  Euphorbia plumerioides var. microphylla Radcl.-Sm. – not accepted
  Euphorbia plummerae S. Watson – not accepted
  Euphorbia plummeriae S. Watson – not accepted
  Euphorbia podadenia Boiss. – accepted
  Euphorbia podagrica I.M. Johnst. – not accepted
  Euphorbia podocarpifolia Urb. – accepted
  Euphorbia podperae Croizat – not accepted
  Euphorbia poecilophylla (Prokh.) Prokh. – accepted
  Euphorbia poeppigii (Klotzsch & Garcke) Boiss. – accepted
  Euphorbia poeppigii var. laxa Boiss. – not accepted
  Euphorbia poggei Pax – not accepted
  Euphorbia poggei var. benguelensis Pax – not accepted
  Euphorbia poggei var. villosa Pax – not accepted
  Euphorbia poinsettiana Buist ex Giah. – not accepted
  Euphorbia poissonii Pax – accepted
  Euphorbia poliosperma Urb. – not accepted
  Euphorbia polyacantha Boiss. – accepted
  Euphorbia polyacantha ssp. rosenii Pax – not accepted
  Euphorbia polyacantha var. subinarticulata Schweinf. – not accepted
  Euphorbia polyantha Pax – accepted
  Euphorbia polycarpa Benth. – accepted – smallseed sandmat
  Euphorbia polycarpa var. appendiculata (Engelm.) Munz – not accepted
  Euphorbia polycarpa var. carmenensis (Rose) L.C. Wheeler – accepted
  Euphorbia polycarpa var. genuiflexa L.C. Wheeler – accepted
  Euphorbia polycarpa var. hirtella Boiss. – not accepted
  Euphorbia polycarpa var. intermixta (S. Watson) L.C. Wheeler – not accepted
  Euphorbia polycarpa var. johnstonii L.C. Wheeler – accepted
  Euphorbia polycarpa var. mejamia L.C. Wheeler – accepted
  Euphorbia polycarpa var. parishii (Greene) Jeps. – not accepted
  Euphorbia polycarpa var. petrina (S. Watson) I.M. Johnst. – not accepted
  Euphorbia polycarpa var. polycarpa Benth. – accepted – smallseed sandmat
  Euphorbia polycarpa var. simulans L.C. Wheeler – not accepted
  Euphorbia polycarpa var. typica L.C. Wheeler – not accepted
  Euphorbia polycarpa var. vestita S. Watson – not accepted
  Euphorbia polycaula Boiss. & Hohen. – accepted
  Euphorbia polycephala Marloth – accepted
  Euphorbia polychroma A. Kern. – accepted
  Euphorbia polychroma ssp. lingulata (Heuff.) Soó – not accepted
  Euphorbia polychroma ssp. microsperma (Murb.) Beck – not accepted
  Euphorbia polychroma var. microsperma Murb. – not accepted
  Euphorbia polyclada Boiss. – not accepted
  Euphorbia polycnemoides Hochst. ex Boiss. – accepted
  Euphorbia polygalifolia Boiss. & Reut. – accepted
  Euphorbia polygalifolia ssp. hirta (Lange) M. Laínz – accepted
  Euphorbia polygalifolia ssp. mariolensis (Rouy) Mateo & Figuerola – not accepted
  Euphorbia polygalifolia ssp. polygalifolia Boiss. & Reut. – accepted
  Euphorbia polygalifolia ssp. vasconcensis Vivant ex Kerguélen – accepted
  Euphorbia polygalifolia var. hirta Lange – not accepted
  Euphorbia polygona Haw. – accepted
  Euphorbia polygona var. alba D.H. Schnabel – accepted
  Euphorbia polygona var. ambigua D.H. Schnabel – accepted
  Euphorbia polygona var. anoplia (Stapf) D.H. Schnabel – accepted
  Euphorbia polygona var. exilis D.H. Schnabel – accepted
  Euphorbia polygona var. hebdomadalis D.H. Schnabel – accepted
  Euphorbia polygona var. horrida (Boiss.) D.H.Schnabel – accepted
  Euphorbia polygona var. major (A.C. White, R.A. Dyer & B. Sloane) D.H. Schnabel – accepted
  Euphorbia polygona var. minor D.H. Schnabel – accepted
  Euphorbia polygona var. nivea D.H. Schnabel – accepted
  Euphorbia polygona var. noorsveldensis (A.C. White, R.A. Dyer & B. Sloane) D.H. Schnabel – accepted
  Euphorbia polygona var. polygona Haw. – accepted
  Euphorbia polygona var. striata (A.C. White, R.A. Dyer & B. Sloane) D.H. Schnabel – accepted
  Euphorbia polygonata Lodd. – not accepted
  Euphorbia polygonifolia L. – accepted – seaside sandmat
  Euphorbia polygonisperma Gren. & Godr. – not accepted
  Euphorbia polyphylla Engelm. ex Holz. – accepted – Lesser Florida spurge
  Euphorbia polytimetica (Prokh.) Prokh. – not accepted
  Euphorbia pomiformis Thunb. – not accepted
  Euphorbia ponderosa S. Carter – accepted
  Euphorbia pondii Millsp. – accepted
  Euphorbia pontica Prokh. – not accepted
  Euphorbia popayanensis Pax – not accepted
  Euphorbia porphyrantha Phil. – accepted
  Euphorbia porphyrastra Hand.-Mazz. – not accepted
  Euphorbia porteriana (Small) Oudejans – accepted – Porter's sandmat
  Euphorbia porteriana var. keyensis (Small) Oudejans – not accepted
  Euphorbia porteriana var. scoparia (Small) Oudejans – not accepted
  Euphorbia portlandica L. – accepted
  Euphorbia portlandica ssp. tetraceras (Lange) Nyman – not accepted
  Euphorbia portoricensis Urb. – not accepted
  Euphorbia portoricensis var. albescens Urb. – not accepted
  Euphorbia portoricensis var. genuina Urb. – not accepted
  Euphorbia portucasadiana (Croizat) Subils – accepted
  Euphorbia portulacoides L. – accepted
  Euphorbia portulacoides ssp. collina (Phil.) Croizat – accepted
  Euphorbia portulacoides ssp. major (Müll. Arg.) Croizat – accepted
  Euphorbia portulacoides ssp. nahuelhuapina Croizat – not accepted
  Euphorbia portulacoides ssp. normalis Croizat – not accepted
  Euphorbia portulacoides ssp. portulacoides L. – accepted
  Euphorbia portulacoides var. acutifolia Boiss. – not accepted
  Euphorbia portulacoides var. andensis Croizat – not accepted
  Euphorbia portulacoides var. bridgesii Boiss. – not accepted
  Euphorbia portulacoides var. collina (Phil.) Croizat – not accepted
  Euphorbia portulacoides var. glabra Phil. – not accepted
  Euphorbia portulacoides var. glaucescens Chodat & Wilczek – not accepted
  Euphorbia portulacoides var. major Müll. Arg. – not accepted
  Euphorbia portulacoides var. minor Hicken – not accepted
  Euphorbia portulacoides var. normalis Kuntze – not accepted
  Euphorbia portulacoides var. obtusifolia Müll. Arg. – not accepted
  Euphorbia portulacoides var. porphyrantha Kuntze – not accepted
  Euphorbia portulacoides var. spathulata Chodat & Wilczek – not accepted
  Euphorbia portulacoides var. trinervia Boiss. – not accepted
  Euphorbia portulacoides var. xanthantha Kuntze – not accepted
  Euphorbia portulana S. Watson – not accepted
  Euphorbia postii Boiss. – not accepted
  Euphorbia potaninii Prokh. – accepted
  Euphorbia potentilloides Boiss. – accepted
  Euphorbia potosina Fernald – accepted
  Euphorbia potosina var. lamasis Carvajal & Lomelí – not accepted
  Euphorbia pouzolzii Loisel. – not accepted
  Euphorbia praecox (Boiss.) Fisch. ex Grossh. – not accepted
  Euphorbia preslii Guss. – not accepted
  Euphorbia preslii Spruner ex Nyman – not accepted
  Euphorbia preslii var. andicola Danguy & Cherm. – not accepted
  Euphorbia preslii var. glaberrima Boiss. – not accepted
  Euphorbia preussii Pax – not accepted
  Euphorbia prieuriana Baill. – not accepted
  Euphorbia primulifolia Baker – accepted
  Euphorbia primulifolia var. begardii Cremers – accepted
  Euphorbia primulifolia var. primulifolia Baker – accepted
  Euphorbia proballyana L.C. Leach – accepted
  Euphorbia proballyana var. multangula S. Carter – accepted
  Euphorbia proballyana var. proballyana L.C. Leach – accepted
  Euphorbia procera M. Bieb. – accepted
  Euphorbia procera var. trichocarpa W.D.J. Koch – not accepted
  Euphorbia procera var. tuberculata W.D.J. Koch – not accepted
  Euphorbia proctorii (D.G. Burch) Correll – accepted
  Euphorbia procumbens Mill. – accepted
  Euphorbia procumbens Meerb. – not accepted
  Euphorbia procumbens DC. – not accepted
  Euphorbia prokhanovii Popov – not accepted
  Euphorbia prolifera Buch.-Ham. ex D. Don – accepted
  Euphorbia prolifera Ehrenb. ex Boiss. – not accepted
  Euphorbia promecocarpa P.H. Davis – accepted
  Euphorbia prona S. Carter – accepted
  Euphorbia propinqua R. Br. ex N.E. Br. – not accepted
  Euphorbia prorepens Popov – not accepted
  Euphorbia prostrata Aiton – accepted – ground spurge, blue weed, prostrate sandmat, prostrate spurge
  Euphorbia prostrata Burch. ex Hemsl. – not accepted
  Euphorbia prostrata var. caudirhiza Fosberg – not accepted
  Euphorbia prostrata var. vestita Engelm. ex Boiss. – not accepted
  Euphorbia proteifolia Boiss. – not accepted
  Euphorbia provincialis Willd. – not accepted
  Euphorbia provincialis Noë ex Nyman – not accepted
  Euphorbia prunifolia Jacq. – not accepted – painted euphorbia
  Euphorbia prunifolia f. silvatica Chodat & Hassl. – not accepted
  Euphorbia prunifolia var. angustifolia Müll. Arg. – not accepted
  Euphorbia prunifolia var. genuina Müll. Arg. – not accepted
  Euphorbia prunifolia var. repanda Müll. Arg. – not accepted
  Euphorbia przewalskii Prokh. – not accepted
  Euphorbia psammogeton P.S. Green – accepted
  Euphorbia pseudagraria P.A. Smirn. – accepted
  Euphorbia pseudoapios Maire & Weiller – accepted
  Euphorbia pseudobrachiata Dinter – not accepted
  Euphorbia pseudoburuana P.R.O. Bally & S. Carter – accepted
  Euphorbia pseudocactus A. Berger – accepted
  Euphorbia pseudochamaesyce Fisch. & C.A. Mey. – not accepted
  Euphorbia pseudochamaesyce f. pilosa (C.A. Mey.) Kitag. – not accepted
  Euphorbia pseudocyparissias Jord. – not accepted
  Euphorbia pseudodendroides H. Lindb. – not accepted
  Euphorbia pseudoengleri Pax – not accepted
  Euphorbia pseudofalcata Chiov. – not accepted
  Euphorbia pseudofulva Miranda – not accepted
  Euphorbia pseudoglareosa Klokov – not accepted
  Euphorbia pseudoglobosa Marloth – accepted
  Euphorbia pseudograeca Grossh. – not accepted
  Euphorbia pseudograntii Pax – accepted
  Euphorbia pseudograntii (Hook. f.) Bruyns – not accepted
  Euphorbia pseudohirsuta Bruyns – accepted
  Euphorbia pseudoholstii Pax – not accepted
  Euphorbia pseudolaevis Bruyns – accepted
  Euphorbia pseudomollis Bruyns – accepted
  Euphorbia pseudonervosa Bruyns – not accepted
  Euphorbia pseudonudicaulis Bruyns – accepted
  Euphorbia pseudonutans Thell. – not accepted
  Euphorbia pseudonutans var. hirsuta (Torr.) Farw. – not accepted
  Euphorbia pseudopeplus Speg. – not accepted
  Euphorbia pseudopetiolata Bruyns – accepted
  Euphorbia pseudoracemosa (P.R.O. Bally) Bruyns – accepted
  Euphorbia pseudoracemosa var. lorifolia (P.R.O. Bally) Bruyns – accepted
  Euphorbia pseudoracemosa var. pseudoracemosa (P.R.O. Bally) Bruyns – accepted
  Euphorbia pseudosaxatilis Kanitz – not accepted
  Euphorbia pseudoserpyllifolia Millsp. – not accepted
  Euphorbia pseudoserpyllifolia f. typica J.T. Howell – not accepted
  Euphorbia pseudoserpyllifolia f. villosa J.T. Howell – not accepted
  Euphorbia pseudosikkimensis (Hurus. & Yu. Tanaka) Radcl.-Sm. – accepted
  Euphorbia pseudosimplex Bruyns – accepted
  Euphorbia pseudosororia (Prokh.) Grossh. – not accepted
  Euphorbia pseudostellata Bruyns – accepted
  Euphorbia pseudotrinervis Bruyns – accepted
  Euphorbia pseudotuberosa Pax – accepted
  Euphorbia pseudovillosa Klokov – not accepted
  Euphorbia pseudovirgata (Schur) Soó – not accepted – leafy spurge
  Euphorbia pseudovolkensii Bruyns – accepted
  Euphorbia pteroclada L.C. Leach – accepted
  Euphorbia pterococca Brot. – accepted
  Euphorbia pterococca var. pilosa Lazare & Charpin – not accepted
  Euphorbia pteroneura A. Berger – accepted
  Euphorbia pteroneura var. macdougalliana Croizat – not accepted
  Euphorbia pteroneura var. typica Croizat – not accepted
  Euphorbia pubentissima Michx. – accepted – false flowering spurge, southeastern flowering spurge
  Euphorbia pubentissima var. glabrata Boiss. – not accepted
  Euphorbia pubera Blume – not accepted
  Euphorbia puberula Fernald – not accepted
  Euphorbia pubescens Vahl – not accepted
  Euphorbia pubescens f. subglabra (Gren. & Godr.) O. Bolňs & Vigo – not accepted
  Euphorbia pubescens subvar. integrifolia Deysson – not accepted
  Euphorbia pubescens subvar. serrulatifolia Deysson – not accepted
  Euphorbia pubescens var. crispata (Willd. ex Hornem.) Boiss. – not accepted
  Euphorbia pubescens var. erioclada Sart. ex Nyman – not accepted
  Euphorbia pubescens var. glabrescens St.-Lag. – not accepted
  Euphorbia pubescens var. glabriflora (Vis.) Nyman – not accepted
  Euphorbia pubescens var. laevis Merino – not accepted
  Euphorbia pubescens var. leucotricha (Boiss.) Boiss. – not accepted
  Euphorbia pubescens var. serrata Lojac. – not accepted
  Euphorbia pubescens var. subglabra Gren. & Godr. – not accepted
  Euphorbia pubicaulis S. Moore – not accepted
  Euphorbia pubigera Friv. ex Boiss. – not accepted
  Euphorbia pubiglans N.E. Br. – accepted
  Euphorbia pudibunda (P.R.O. Bally) Bruyns – accepted
  Euphorbia pudibunda var. lanata (S. Carter) Bruyns – accepted
  Euphorbia pudibunda var. pudibunda (P.R.O. Bally) Bruyns – accepted
  Euphorbia pudibunda var. rotundifolia (Malaisse & Lecron) Bruyns – accepted
  Euphorbia pueblensis Brandegee – accepted
  Euphorbia pugniformis Boiss. – not accepted
  Euphorbia pulchella Lag. & Rodr. – not accepted
  Euphorbia pulchella Brouss. ex DC. – not accepted
  Euphorbia pulchella Sessé & Moç. – not accepted
  Euphorbia pulchella Kunth – not accepted
  Euphorbia pulcherrima Willd. ex Klotzsch – accepted – poinsettia, nochebuena, flor de pascua
  Euphorbia pulcherrima f. lutea Standl. – not accepted
  Euphorbia pulverulenta Kit. – not accepted
  Euphorbia pulvinata Marloth – accepted
  Euphorbia pumicicola Huft – accepted
  Euphorbia pumila Sibth. & Sm. – not accepted
  Euphorbia pumila Pall. ex Ledeb. – not accepted
  Euphorbia punctata Delile – accepted
  Euphorbia punctata Krock. – not accepted
  Euphorbia punctulata Andersson – accepted
  Euphorbia pungens Lam. – not accepted
  Euphorbia pungens Banks & Sol. – not accepted
  Euphorbia punicea Sw. – accepted
  Euphorbia purisimana Millsp. – not accepted
  Euphorbia purpurascens Schousb. – not accepted
  Euphorbia purpurascens Schumach. & Thonn. – not accepted
  Euphorbia purpurascens Salzm. ex Ball – not accepted
  Euphorbia purpurascens Deysson – not accepted
  Euphorbia purpurata Thuill. – not accepted
  Euphorbia purpurata var. elliptica Pers. – not accepted
  Euphorbia purpurea (Raf.) Fernald – accepted – Darlington's spurge, Darlington's glade spurge
  Euphorbia purpureomaculata T.J. Feng & J.X. Huang – not accepted
  Euphorbia pusilla Lag. – not accepted
  Euphorbia pusillima Post – not accepted
  Euphorbia pycnanthema Engelm. – not accepted
  Euphorbia pycnanthema f. serrata Millsp. – not accepted
  Euphorbia pycnophylla K. Koch – not accepted
  Euphorbia pycnostegia Boiss. – accepted
  Euphorbia pycnostegia var. laxa Boiss. – not accepted
  Euphorbia pycnostegia var. zornioides (Boiss.) Santapau – not accepted
  Euphorbia pygmaea Ledeb. – accepted
  Euphorbia pygmaea Phil. – not accepted
  Euphorbia pyrenaica Jord. – accepted
  Euphorbia pyrifolia Lam. – accepted
  Euphorbia pyrifolia var. coriacea Radcl.-Sm. – accepted
  Euphorbia pyrifolia var. pyrifolia Lam. – accepted
  Euphorbia pyriformis N.E. Br. – not accepted
  Euphorbia pythinsa Friv. ex Nyman – not accepted
  Euphorbia qarad Deflers – accepted
  Euphorbia quadrangularis Pax – accepted
  Euphorbia quadrata Nel – accepted
  Euphorbia quadrialata Pax – accepted
  Euphorbia quadrilatera L.C. Leach – accepted
  Euphorbia quadrispina S. Carter – accepted
  Euphorbia quaitensis S. Carter – accepted
  Euphorbia quartziticola Leandri – accepted
  Euphorbia quinquecostata Volkens – accepted
  Euphorbia quinqueradiata Kitam. – not accepted
  Euphorbia quintasii Pax – not accepted
  Euphorbia quitensis Boiss. – accepted
  Euphorbia rablensis Wulfen ex Schrank – not accepted
  Euphorbia racemosa E. Mey. ex Boiss. – not accepted
  Euphorbia racemosa Tausch ex Rchb. – not accepted
  Euphorbia radians Benth. – accepted – sun spurge
  Euphorbia radians var. radians Benth. – accepted
  Euphorbia radians var. stormiae (Croizat) Rzed. & Calderón – accepted
  Euphorbia radiata Thunb. – not accepted
  Euphorbia radiata E. Mey. ex Boiss. – not accepted
  Euphorbia radicans Moric. ex Klotzsch & Garcke – not accepted
  Euphorbia radiifera L.C. Leach – accepted
  Euphorbia radioloides Boiss. – accepted
  Euphorbia radioloides var. rubra Millsp. – not accepted
  Euphorbia rafinesquei Greene – not accepted
  Euphorbia ragusana Rchb. – not accepted
  Euphorbia ramanensis Baum – not accepted
  Euphorbia ramena Buddens. & Razaf. – accepted
  Euphorbia ramipressa Croizat – accepted
  Euphorbia ramofraga Denis & Humbert ex Leandri – accepted
  Euphorbia ramosa Seaton – accepted
  Euphorbia ramosa var. villosior Greenm. – not accepted
  Euphorbia ramosissima Loisel. – not accepted
  Euphorbia ramosissima Hook. & Arn. – not accepted
  Euphorbia ramulosa L.C. Leach – accepted
  Euphorbia randrianjohanyi Haev. & J.N. Labat – accepted
  Euphorbia rangeana Dinter ex Jacobsen – not accepted
  Euphorbia rangovalensis Leandri – accepted
  Euphorbia raphanorrhiza (Millsp.) J.F. Macbr. – accepted
  Euphorbia raphilippii Oudejans – accepted
  Euphorbia rapulum Kar. & Kir. – accepted
  Euphorbia rattanii S. Watson – not accepted
  Euphorbia rauhii Haev. & J.N. Labat – accepted
  Euphorbia rayturneri V.W. Steinm. & Jercinovic – accepted
  Euphorbia razafindratsirae Lavranos – accepted
  Euphorbia razafinjohanyi Ursch & Leandri – accepted
  Euphorbia reboudiana Coss. ex Batt. & Trab. – not accepted
  Euphorbia rechingeri Greuter – accepted
  Euphorbia reclinata P.R.O. Bally & S. Carter – accepted
  Euphorbia reconciliationis Radcl.-Sm. – accepted
  Euphorbia recta Klotzsch – not accepted
  Euphorbia rectirama N.E. Br. – accepted
  Euphorbia recurva Hook. f. – accepted
  Euphorbia reflexa Formánek – not accepted
  Euphorbia refracta Lowe – not accepted
  Euphorbia refugii Croizat – not accepted
  Euphorbia reghinii (Chiov.) Vollesen – not accepted
  Euphorbia regina H. Lév. – not accepted
  Euphorbia regis-jubae Webb & Berthel. – accepted
  Euphorbia reichenbachiana Willk. – not accepted
  Euphorbia reichenbachiana Lojac. – not accepted
  Euphorbia reineckei Pax – accepted
  Euphorbia reinhardtii Volkens – not accepted
  Euphorbia reinhardtii var. bilocularis (N.E. Br.) Oudejans – not accepted
  Euphorbia reinwardtiana Steud. – not accepted
  Euphorbia remyi A. Gray ex Boiss. – accepted – Remy's sandmat
  Euphorbia remyi var. hanaleiensis Sherff – not accepted – Remy's sandmat
  Euphorbia remyi var. kahiliana Sherff – not accepted
  Euphorbia remyi var. kauaiensis O. Deg. & Sherff – accepted – Remy's sandmat
  Euphorbia remyi var. leptopoda Sherff – not accepted
  Euphorbia remyi var. lydgatei Sherff – not accepted
  Euphorbia remyi var. molesta Sherff – not accepted
  Euphorbia remyi var. olokelensis Skottsb. & Sherff – not accepted
  Euphorbia remyi var. pteropoda Sherff – not accepted
  Euphorbia remyi var. remyi A. Gray ex Boiss. – accepted – Remy's sandmat
  Euphorbia remyi var. wahiawana Sherff – not accepted
  Euphorbia remyi var. waimeana Sherff – not accepted
  Euphorbia remyi var. wilkesii Sherff – not accepted
  Euphorbia reniformis Blume – accepted
  Euphorbia renneyi (S. Carter) Bruyns – accepted
  Euphorbia renouardii Pax – not accepted
  Euphorbia repanda (Haw.) Sweet – accepted
  Euphorbia repens K. Koch – accepted
  Euphorbia repetita Hochst. ex A. Rich. – accepted
  Euphorbia reptans P.R.O. Bally & S. Carter – accepted
  Euphorbia requienii Lojac. – not accepted
  Euphorbia requienii var. dianthifolia Lojac. – not accepted
  Euphorbia resinifera O. Berg – accepted – resin spurge, Euphorbe ŕ résine
  Euphorbia resinifera var. chlarosoma Croizat – not accepted
  Euphorbia resinifera var. typica Croizat – not accepted
  Euphorbia restiacea Benth. – accepted
  Euphorbia restituta N.E. Br. – accepted
  Euphorbia restricta R.A. Dyer – accepted
  Euphorbia retroscabra S. Watson – not accepted
  Euphorbia retrospina Rauh & Gerold – accepted
  Euphorbia retusa Forssk. – accepted
  Euphorbia retusa (L.) Cav. – not accepted
  Euphorbia reuteriana Boiss. – accepted
  Euphorbia revoluta Engelm. – accepted – threadstem sandmat, threadstem spurge
  Euphorbia rhabdodes Boiss. – accepted
  Euphorbia rhabdotosperma Radcl.-Sm. – accepted
  Euphorbia rhipsaloides Lem. – not accepted
  Euphorbia rhizophora (P.R.O. Bally) Bruyns – accepted
  Euphorbia rhombea Willd. ex Link – not accepted
  Euphorbia rhombifolia Boiss. – accepted
  Euphorbia rhytidosperma Boiss. & Balansa – accepted
  Euphorbia rhytisperma (Klotzsch & Garcke) Boiss. – accepted
  Euphorbia riae Pax & K. Hoffm. – not accepted
  Euphorbia richardiana Baill. – not accepted
  Euphorbia richardsiae L.C. Leach – accepted
  Euphorbia richardsiae ssp. richardsiae L.C. Leach – accepted
  Euphorbia richardsiae ssp. robusta L.C. Leach – accepted
  Euphorbia richardsonii Mayfield – accepted
  Euphorbia ridleyi Croizat – accepted
  Euphorbia riebeckii Pax – accepted
  Euphorbia riedeliana Boiss. – not accepted
  Euphorbia rigens Sweet – not accepted
  Euphorbia rigida M. Bieb. – accepted – upright myrtle spurge
  Euphorbia rigida Loisel. – not accepted
  Euphorbia rigida var. mauretanica (Maire) Oudejans – not accepted
  Euphorbia rigidula Steud. – not accepted
  Euphorbia rigoi Boiss. ex Freyn – not accepted
  Euphorbia riinae V.W. Steinm. – accepted
  Euphorbia rimarum Coss. & Balansa – accepted
  Euphorbia rinconis M.E. Jones – not accepted
  Euphorbia riparia Jord. – not accepted
  Euphorbia ritchiei (P.R.O. Bally) Bruyns – accepted
  Euphorbia ritchiei ssp. marsabitensis (S. Carter) Bruyns – accepted
  Euphorbia ritchiei ssp. nyambensis (S. Carter) Bruyns – accepted
  Euphorbia ritchiei ssp. ritchiei (P.R.O. Bally) Bruyns – accepted
  Euphorbia rivae Pax – accepted
  Euphorbia rivasii P. Palau – not accepted
  Euphorbia rivularis A. Heller – not accepted
  Euphorbia robbiae Turrill – not accepted
  Euphorbia robecchii Pax – accepted
  Euphorbia robivelonae Rauh – accepted
  Euphorbia robusta (Engelm.) Small – not accepted – robust spurge, Rocky Mountain spurge
  Euphorbia robusta var. interioris Norton – not accepted
  Euphorbia rochaensis (Croizat) Alonso Paz & Marchesi – accepted
  Euphorbia rochebrunei Franch. & Sav. – not accepted
  Euphorbia rockii C.N. Forbes – accepted – Koolau Range sandmat
  Euphorbia rockii var. grandiflora (Hillebr.) Oudejans – not accepted
  Euphorbia rockii var. grandifolia (Hillebr.) Oudejans – not accepted
  Euphorbia roemerana Scheele – not accepted
  Euphorbia roemeriana Scheele – accepted – Roemer's spurge
  Euphorbia roeseri (Boiss.) Halácsy – not accepted
  Euphorbia rogeri N.E. Br. – not accepted
  Euphorbia rohlenae Velen. – accepted
  Euphorbia roschanica (Ikonn.) Czerepan. – not accepted
  Euphorbia rosea Retz. – accepted
  Euphorbia rosescens E.L. Bridges & Orzell – accepted – scrub spurge
  Euphorbia rossiana Pax – accepted
  Euphorbia rossica P.A. Smirn. – accepted
  Euphorbia rossii Rauh & Buchloh – accepted
  Euphorbia rosularis Fed. – accepted
  Euphorbia rothiana Spreng. – accepted
  Euphorbia rothiana var. pubescens (Boiss.) Oudejans – not accepted
  Euphorbia rothiana var. wightiana (Boiss.) Oudejans – not accepted
  Euphorbia rothrockii (Millsp.) Oudejans – not accepted
  Euphorbia rotundata Hochst. – not accepted
  Euphorbia rotundifolia (Lam.) Loisel. – not accepted
  Euphorbia rotundifolia Hook. & Arn. – not accepted
  Euphorbia rowlandii R.A. Dyer – accepted
  Euphorbia royleana Boiss. – accepted
  Euphorbia rubella Pax – accepted
  Euphorbia rubens Chaix – not accepted
  Euphorbia rubescens Link – not accepted
  Euphorbia rubicunda Blume – not accepted
  Euphorbia rubida Greenm. – not accepted
  Euphorbia rubra Cav. – not accepted
  Euphorbia rubricaulis Regel – not accepted
  Euphorbia rubriflora N.E. Br. – accepted
  Euphorbia rubriflora H. Lév. – not accepted
  Euphorbia rubriseminalis S. Carter ex Boulos – accepted
  Euphorbia rubrispinosa S. Carter – accepted
  Euphorbia rubromarginata L.E. Newton – accepted
  Euphorbia rubrosperma Lotsy – not accepted
  Euphorbia ruderalis Dumort. – not accepted
  Euphorbia ruderalis Scheele – not accepted
  Euphorbia rudis N.E. Br. – not accepted
  Euphorbia rudolfii N.E. Br. – accepted
  Euphorbia ruegeliana Shuttlew. ex Boiss. – not accepted
  Euphorbia ruficeps S. Carter – accepted
  Euphorbia rugosa Kit. – not accepted
  Euphorbia rugosiflora L.C. Leach – accepted
  Euphorbia rugosissima Pau & Font Quer – not accepted
  Euphorbia rugulosa (Engelm. ex Millsp.) Greene – not accepted
  Euphorbia ruiziana (Klotzsch & Garcke) Boiss. – accepted
  Euphorbia ruizlealii Subils – accepted
  Euphorbia rumelica Formánek – not accepted
  Euphorbia rumicifolia Boiss. – not accepted
  Euphorbia rupestris Ledeb. – accepted
  Euphorbia rupestris Larrańaga – not accepted
  Euphorbia rupicola Boiss. – not accepted
  Euphorbia rupicola Scheele – not accepted
  Euphorbia rupicola var. almeriensis Pau – not accepted
  Euphorbia rupicola var. clementei (Boiss.) Pau – not accepted
  Euphorbia rupicola var. major Boiss. – not accepted
  Euphorbia rusbyi Greene – not accepted
  Euphorbia ruscifolia (Boiss.) N.E. Br. – accepted
  Euphorbia ruscinonensis Boiss. – not accepted
  Euphorbia ruspolii Chiov. – not accepted
  Euphorbia rutilis (Millsp.) Standl. & Steyerm. – accepted
  Euphorbia rzedowskii McVaugh – accepted
  Euphorbia sabulicola Boiss. – accepted
  Euphorbia saccharata Boiss. – accepted
  Euphorbia sacchii Chiov. – not accepted
  Euphorbia sachetiana (J. Florence) Govaerts – accepted
  Euphorbia sagittaria Marloth – not accepted
  Euphorbia sagraeana A. Rich. ex Boiss. – not accepted
  Euphorbia sahendi Bornm. – accepted
  Euphorbia sajanensis (Boiss.) Baikov – not accepted
  Euphorbia sakarahaensis Rauh – accepted
  Euphorbia salicetorum Jord. – not accepted
  Euphorbia salicifolia Host – accepted
  Euphorbia salicifolia f. pseudosalicifolia (Schur) Oudejans – not accepted
  Euphorbia salicifolia var. angustata Rochel – not accepted
  Euphorbia salicifolia var. incana (Schur) Nyman – not accepted
  Euphorbia salicifolia var. pseudosalicifolia Schur – not accepted
  Euphorbia salina Willd. ex Boiss. – not accepted
  Euphorbia salota Leandri – accepted
  Euphorbia salsicola S. Carter – accepted
  Euphorbia salsuginosa (McVaugh) Radcl.-Sm. & Govaerts – not accepted
  Euphorbia samburuensis P.R.O. Bally & S. Carter – accepted
  Euphorbia sampsonii Hance – not accepted
  Euphorbia sanasunitensis Hand.-Mazz. – not accepted
  Euphorbia sancta Pax – not accepted
  Euphorbia sanctae-catharinae Fayed – accepted
  Euphorbia sanguinea Hochst. & Steud. ex Benth. – not accepted
  Euphorbia sanguinea Thore – not accepted
  Euphorbia sanguinea var. intermedia Boiss. – not accepted
  Euphorbia sanguinea var. jemenica Schweinf. – not accepted
  Euphorbia sanguinea var. natalensis Boiss. – not accepted
  Euphorbia sanguinea var. nilagirica (Miq.) Boiss. – not accepted
  Euphorbia sanguinea var. setigera (Klotzsch & Garcke) Boiss. – not accepted
  Euphorbia sanmartensis Rusby – not accepted
  Euphorbia santapaui A.N. Henry – accepted
  Euphorbia sapiifolia Baill. – not accepted
  Euphorbia sapinii De Wild. – accepted
  Euphorbia saratoi Ardoino – not accepted
  Euphorbia sarawschanica Regel – accepted
  Euphorbia sarcoceras O.L.M. Silva & Cordeiro – accepted
  Euphorbia sarcodes Boiss. – accepted
  Euphorbia sarcostemmatoides Dinter – not accepted
  Euphorbia sarcostemmoides J.H. Willis – accepted
  Euphorbia sareciana M.G. Gilbert – accepted
  Euphorbia sareptana Becker – accepted
  Euphorbia sarmentosa Welw. ex Pax – accepted
  Euphorbia satureioides Lam. – not accepted
  Euphorbia saudiarabica Fayed & D. Al-Zahrani – accepted
  Euphorbia sauliana Boreau ex Boiss. – not accepted
  Euphorbia saurica Baikov – accepted
  Euphorbia savaryi Kiss – not accepted
  Euphorbia saxatilis Jacq. – accepted
  Euphorbia saxatilis var. carnica Boiss. – not accepted
  Euphorbia saxicola Radcl.-Sm. – accepted
  Euphorbia saxorum P.R.O. Bally & S. Carter – accepted
  Euphorbia scabrella Boiss. – not accepted
  Euphorbia scabrifolia Kurz – accepted
  Euphorbia scandens Kunth – accepted
  Euphorbia scarlatina S. Carter – accepted
  Euphorbia scatorhiza S. Carter – accepted
  Euphorbia schaeferi Dinter – not accepted
  Euphorbia schaijesii (Malaisse) Bruyns – accepted
  Euphorbia scheffleri Pax – accepted
  Euphorbia schickendantzii Hieron. – accepted
  Euphorbia schiedeana (Klotzsch & Garcke) Mayfield ex C. Nelson – accepted
  Euphorbia schillingii Radcl.-Sm. – accepted
  Euphorbia schillingii var. praecox A.D. Schill. ex Radcl.-Sm. – not accepted
  Euphorbia schimperi C. Presl – accepted
  Euphorbia schimperiana Scheele – accepted
  Euphorbia schimperiana Hochst. ex A. Rich. – not accepted
  Euphorbia schimperiana var. buchananii (Pax) N.E. Br. – not accepted
  Euphorbia schimperiana var. pubescens (N.E. Br.) S. Carter – accepted
  Euphorbia schimperiana var. schimperiana Scheele – accepted
  Euphorbia schimperiana var. velutina N.E. Br. – accepted
  Euphorbia schinzii Pax – accepted
  Euphorbia schizacantha Pax – accepted
  Euphorbia schizadenia Boiss. & Hohen. – not accepted
  Euphorbia schizoceras Boiss. – not accepted
  Euphorbia schizolepis F. Muell. ex Boiss. – accepted
  Euphorbia schizolepis var. glabra Benth. – not accepted
  Euphorbia schizoloba Engelm. – accepted – Mojave spurge
  Euphorbia schizoloba var. mollis Norton – not accepted
  Euphorbia schlechtendalii Boiss. – accepted
  Euphorbia schlechtendalii var. pacifica McVaugh – accepted
  Euphorbia schlechtendalii var. schlechtendalii Boiss. – accepted
  Euphorbia schlechtendalii var. websteri McVaugh – accepted
  Euphorbia schlechteri Pax – accepted
  Euphorbia schmitzii L.C. Leach – accepted
  Euphorbia schoenlandii Pax – accepted
  Euphorbia schottiana Boiss. – accepted
  Euphorbia schubei Pax – accepted
  Euphorbia schugnanica B. Fedtsch. – accepted
  Euphorbia schultzii Benth. – accepted
  Euphorbia schumannii Radcl.-Sm. – accepted
  Euphorbia schweinfurthii Balf. f. – accepted
  Euphorbia sciadophila Boiss. – accepted
  Euphorbia sciadophila f. orbicularis Chodat & Hassl. – not accepted
  Euphorbia scitula L.C. Leach – accepted
  Euphorbia sclerocyathium Korovin & Popov – accepted
  Euphorbia sclerophylla Boiss. – accepted
  Euphorbia sclerophylla var. myrtifolia Boiss. – not accepted
  Euphorbia sclerophylla var. ruscifolia Boiss. – not accepted
  Euphorbia scolopendrea Haw. – not accepted
  Euphorbia scoparia N.E. Br. – not accepted
  Euphorbia scopiformis (Klotzsch & Garcke) Boiss. – not accepted
  Euphorbia scopoliana Steud. – not accepted
  Euphorbia scopulorum Brandegee – accepted
  Euphorbia scopulorum var. inornata M.C. Johnst. – accepted
  Euphorbia scopulorum var. nuda M.C. Johnst. – accepted
  Euphorbia scopulorum var. scopulorum Brandegee – accepted
  Euphorbia scordiifolia Jacq. – accepted
  Euphorbia scotanum Schltdl. – accepted
  Euphorbia scotanum var. yavalquahuitl (Schltdl.) Boiss. – not accepted
  Euphorbia scripta Sommier & Levier – accepted
  Euphorbia scutiformis V.W. Steinm. & P.E. Berry – accepted
  Euphorbia scyphadena S. Carter – accepted
  Euphorbia sebastinei Binojk. & N.P. Balakr. – accepted
  Euphorbia sebsebei M.G. Gilbert – accepted
  Euphorbia seclusa N.E. Br. – not accepted
  Euphorbia seemannii Klotzsch – not accepted
  Euphorbia segetalis L. – accepted – grainfield spurge
  Euphorbia segetalis ssp. linifolia (Nath. ex L.) Oudejans – not accepted
  Euphorbia segetalis var. litoralis Lange – not accepted
  Euphorbia segetalis var. longibracteata (DC.) Boiss. – not accepted
  Euphorbia segetalis var. pinea (L.) Lange – accepted
  Euphorbia segetalis var. segetalis L. – accepted
  Euphorbia segoviensis (Klotzsch & Garcke) Boiss. – accepted
  Euphorbia seguieri (Scop.) All. – not accepted
  Euphorbia seguieriana Neck. – accepted
  Euphorbia seguieriana ssp. hohenackeri (Boiss.) Rech. f. – accepted
  Euphorbia seguieriana ssp. loiseleurii (Rouy) Greuter & Burdet – not accepted
  Euphorbia seguieriana ssp. seguieriana Neck. – accepted
  Euphorbia seguieriana var. arenivaga (Martrin-Donos) Oudejans – not accepted
  Euphorbia seguieriana var. dentata (Chabert) Oudejans – not accepted
  Euphorbia seguieriana var. firma (Ledeb.) Oudejans – not accepted
  Euphorbia seguieriana var. intermedia (Savul.) Oudejans – not accepted
  Euphorbia seguieriana var. lanceolata (Cariot) Oudejans – not accepted
  Euphorbia seguieriana var. latifolia (J.J. Schmitz & Regel) Oudejans – not accepted
  Euphorbia seguieriana var. minor (Duby) Wilczek – not accepted
  Euphorbia seguieriana var. prostrata Fiori – not accepted
  Euphorbia seguieriana var. sturii (Holuby) Oudejans – not accepted
  Euphorbia seibanica Lavranos & Gifri – accepted
  Euphorbia sekukuniensis R.A. Dyer – accepted
  Euphorbia seleri Donn. Sm. – accepted
  Euphorbia selloi (Klotzsch & Garcke) Boiss. – accepted
  Euphorbia selloi var. setosa Boiss. – not accepted
  Euphorbia selousiana S. Carter – accepted
  Euphorbia semiperfoliata Viv. – accepted
  Euphorbia semiverticillata Halácsy – not accepted
  Euphorbia semivillosa (Prokh.) Krylov – accepted
  Euphorbia semperflorens L.C. Leach – accepted
  Euphorbia sendaica Makino – accepted
  Euphorbia senguptae N.P. Balakr. & Subr. – accepted
  Euphorbia senilis Standl. & Steyerm. – not accepted
  Euphorbia sennenii Pau – not accepted
  Euphorbia sennii Chiov. – accepted
  Euphorbia sepens ssp. flexicaulis (Scheele) Thell. – not accepted
  Euphorbia sepens ssp. psilocyanthia Thell. – not accepted
  Euphorbia sepium N.E. Br. – not accepted
  Euphorbia septentrionalis P.R.O. Bally & S. Carter – accepted
  Euphorbia septentrionalis ssp. gamugofana M.G. Gilbert – accepted
  Euphorbia septentrionalis ssp. septentrionalis P.R.O. Bally & S. Carter – accepted
  Euphorbia sepulta P.R.O. Bally & S. Carter – accepted
  Euphorbia sera-comans Bubani – not accepted
  Euphorbia serbica Formánek – not accepted
  Euphorbia serendipita L.E. Newton – accepted
  Euphorbia seretii De Wild. – accepted
  Euphorbia seretii ssp. seretii De Wild. – accepted
  Euphorbia seretii ssp. variantissima L.C. Leach – accepted
  Euphorbia sericocarpa Hand.-Mazz. – not accepted
  Euphorbia serotina Host – not accepted
  Euphorbia serpens Kunth – accepted – matted sandmat, creeping spurge, round-leafed spurge
  Euphorbia serpens Balb. ex Boiss. – not accepted
  Euphorbia serpens var. fissistipula Thell. – not accepted
  Euphorbia serpens var. flexicaulis (Scheele) J.M. Coult. – not accepted
  Euphorbia serpens var. imbricata Boiss. – not accepted
  Euphorbia serpens var. indica Engelm. ex Boiss. – not accepted
  Euphorbia serpens var. microphylla Müll. Arg. – not accepted
  Euphorbia serpens var. montevidensis (Boiss.) Cabrera – not accepted
  Euphorbia serpens var. ovalifolia (Engelm. ex Klotzsch) Allem – not accepted
  Euphorbia serpens var. radicans Englm. ex Boiss. – not accepted
  Euphorbia serpentini Novák – accepted
  Euphorbia serpicula Hiern – not accepted
  Euphorbia serpiformis Boiss. – not accepted
  Euphorbia serpyllifolia Pers. – accepted – thymeleaf sandmat
  Euphorbia serpyllifolia ssp. hirtella (Engelm. ex S. Watson) Oudejans – not accepted
  Euphorbia serpyllifolia var. consanguinea Boiss. – not accepted
  Euphorbia serpyllifolia var. genuina Boiss. – not accepted
  Euphorbia serpyllifolia var. hirtella (Engelm. ex S. Watson) L.C. Wheeler – accepted – thymeleaf sandmat
  Euphorbia serpyllifolia var. hirtula (Engelm. ex S. Watson) L.C. Wheeler – accepted – Thymeleaf sandmat
  Euphorbia serpyllifolia var. rugulosa Engelm. ex Millsp. – not accepted
  Euphorbia serpyllifolia var. serpyllifolia Pers. – accepted – thymeleaf sandmat
  Euphorbia serrata L. – accepted – serrate spurge, toothed spurge, saw-toothed spurge
  Euphorbia serrata f. phylloclada (Lange) O. Bolňs & Vigo – not accepted
  Euphorbia serrata f. subacaulis (Rouy) Oudejans – not accepted
  Euphorbia serrata f. ternata (Cout.) Oudejans – not accepted
  Euphorbia serrata var. phylloclada Lange – not accepted
  Euphorbia serrata var. subacaulis Rouy – not accepted
  Euphorbia serrata var. ternata Cout. – not accepted
  Euphorbia serrata var. truncata Pers. – not accepted
  Euphorbia serratifolia S. Carter – accepted
  Euphorbia serrula Engelm. – accepted – sawtooth sandmat
  Euphorbia serrulata Thuill. – not accepted
  Euphorbia serrulata Vell. – not accepted
  Euphorbia serrulata Reinw. ex Blume – not accepted
  Euphorbia serrulata var. pubescens Warb. – not accepted
  Euphorbia seshachalamensis K. Prasad & Prasanna – accepted
  Euphorbia sessei Oudejans – not accepted
  Euphorbia sessiliflora Roxb. – accepted
  Euphorbia sessiliflora Boiss. & Spruner – not accepted
  Euphorbia sessilifolia Klotzsch ex Boiss. – accepted
  Euphorbia seticornis Poir. – not accepted
  Euphorbia setigera E. Mey. – not accepted
  Euphorbia setiloba Engelm. ex Torr. – accepted – Yuma sandmat, fringed spurge, shaggy spurge
  Euphorbia setiloba var. dentata Engelm. ex Boiss. – not accepted
  Euphorbia setiloba var. nodulosa Jeps. – not accepted
  Euphorbia setispina S. Carter – accepted
  Euphorbia setosa (Boiss.) Müll. Arg. – accepted
  Euphorbia sewerzowii (Prokh.) Pavlov – accepted
  Euphorbia sexangularis Henckel – not accepted
  Euphorbia shaferi (Millsp.) L.G. Gonzáles & Bisse – not accepted
  Euphorbia sharkoensis Baill. – accepted
  Euphorbia sharmae U.C. Bhattach. – accepted
  Euphorbia shebeliensis (M.G. Gilbert) Bruyns – accepted
  Euphorbia shetoensis Pax & K. Hoffm. – not accepted
  Euphorbia shirensis Baker f. – not accepted
  Euphorbia shouanensis H. Keng – not accepted
  Euphorbia sibirica Fisch. ex Boiss. – not accepted
  Euphorbia sibthorpii Boiss. – not accepted
  Euphorbia sieboldiana C. Morren & Decne. – accepted
  Euphorbia sieboldiana f. peninsularis Hurus. – not accepted
  Euphorbia sieboldiana f. sylvatica Hurus. – not accepted
  Euphorbia sieboldiana var. grandifolia (Franch. & Sav. ex Hurus.) Oudejans – not accepted
  Euphorbia sieboldiana var. idzuensis (Nakai ex Hurus.) Oudejans – not accepted
  Euphorbia sieboldiana var. montana Tatew. – not accepted
  Euphorbia sieboldiana var. ohsumiensis (Hurus.) Hatus. – not accepted
  Euphorbia sieboldiana var. peninsularis (Hurus.) Kitag. – not accepted
  Euphorbia sieboldiana var. sylvatica (Hurus.) Oudejans – not accepted
  Euphorbia siguatepequensis Standl. – not accepted
  Euphorbia sikkimensis Boiss. – accepted
  Euphorbia sikkimensis ssp. bhutanica Fisch. – not accepted
  Euphorbia silenifolia (Haw.) Sweet – accepted
  Euphorbia siliciicola Dinter – not accepted
  Euphorbia similiramea S. Carter – accepted
  Euphorbia similis A. Berger – not accepted
  Euphorbia simplex K. Koch – not accepted
  Euphorbia simulans (L.C. Wheeler) Warnock & M.C. Johnst. – accepted – mimicking sandmat, similar spurge
  Euphorbia sinaica Hochst. ex Boiss. – not accepted
  Euphorbia sinaloensis Brandegee – accepted
  Euphorbia sinanensis (Hurus.) T. Kuros. & H. Ohashi – not accepted
  Euphorbia sinclairiana Benth. – accepted
  Euphorbia sinensis Jesson & Turrill – not accepted
  Euphorbia sintenisii Boiss. ex Freyn – accepted
  Euphorbia sipolisii N.E. Br. – accepted
  Euphorbia sistanica Dinelli & De Marco – not accepted
  Euphorbia skottsbergii Sherff – accepted – coastal sandmat
  Euphorbia skottsbergii var. audens Sherff – not accepted
  Euphorbia skottsbergii var. kalaeloana Sherff – not accepted
  Euphorbia skottsbergii var. skottsbergii Sherff – accepted – coastal sandmat
  Euphorbia skottsbergii var. typica Sherff – not accepted
  Euphorbia skottsbergii var. vaccinioides Sherff – accepted – coastal sandmat
  Euphorbia sloanei L.C. Wheeler – not accepted
  Euphorbia smallii Oudejans – not accepted
  Euphorbia smirnovii Geltman – accepted
  Euphorbia smithii S. Carter – accepted
  Euphorbia socialis Zoll. – not accepted
  Euphorbia socotrana Balf. f. – accepted
  Euphorbia socotrana ssp. purpurea N. Kilian & P. Hein – accepted
  Euphorbia socotrana ssp. socotrana Balf. f. – accepted
  Euphorbia sogdiana Popov – accepted
  Euphorbia sojakii (Chrtek & Krísa) Dubovik – accepted
  Euphorbia soliflora Vis. ex Boiss. – not accepted
  Euphorbia solisequa Rchb. – not accepted
  Euphorbia somalensis Pax – accepted
  Euphorbia somalensis var. nogalensis A. Hässl. – not accepted
  Euphorbia songweana S. Carter – accepted
  Euphorbia sonorae Rose – accepted
  Euphorbia soobyi McVaugh – accepted
  Euphorbia soongarica Boiss. – accepted
  Euphorbia soongarica Hayek – not accepted
  Euphorbia soongarica ssp. lamprocarpa (Prokh.) Prokh. – not accepted
  Euphorbia sororia Schrenk – accepted
  Euphorbia sparrmanii Boiss. – accepted
  Euphorbia sparsiflora A. Heller – accepted – Wahiawa bog sandmat
  Euphorbia sparsiglandulosa Ponert – accepted
  Euphorbia spartaria N.E. Br. – accepted
  Euphorbia spartiformis Mobayen – accepted
  Euphorbia spartioides Jacq. – not accepted
  Euphorbia spathulata Lam. – accepted – roughpod spurge, warty spurge
  Euphorbia spathulata var. mexicana (Engelm.) Oudejans – not accepted
  Euphorbia speciosa L.C. Leach – accepted
  Euphorbia specksii Rauh – accepted
  Euphorbia spectabilis (S. Carter) Bruyns – accepted
  Euphorbia spellenbergiana Mayfield & V.W. Steinm. – accepted
  Euphorbia sphaerococca Salzm. ex Rchb. – not accepted
  Euphorbia sphaerorhiza Benth. – accepted
  Euphorbia sphaerosperma Shuttlew. ex Boiss. – not accepted
  Euphorbia spicata E. Mey. ex Boiss. – accepted
  Euphorbia spinea N.E. Br. – accepted
  Euphorbia spinescens Pax – not accepted
  Euphorbia spinicapsula Rauh & Petignat – not accepted
  Euphorbia spinidens (Prokh.) Bornm. ex Prokh. – accepted
  Euphorbia spinosa L. – accepted
  Euphorbia spinosa f. ligustica Fiori – not accepted
  Euphorbia spinosa ssp. ligustica (Fiori) Pignatti – accepted
  Euphorbia spinosa ssp. melitensis (Parl.) Nyman – not accepted
  Euphorbia spinosa ssp. spinosa L. – accepted
  Euphorbia spinosa var. bivonae (Steud.) Fiori – not accepted
  Euphorbia spinosa var. brachyadenia Boiss. – not accepted
  Euphorbia spinosa var. inermis Boiss. – not accepted
  Euphorbia spinosa var. melitensis (Parl.) Fiori – not accepted
  Euphorbia spinosa var. montana (Lojac.) Fiori – not accepted
  Euphorbia spinulosa (S. Carter) Bruyns – accepted
  Euphorbia spiralis Balf. f. – accepted
  Euphorbia spissa Thulin – accepted
  Euphorbia spissiflora S. Carter – accepted
  Euphorbia splendens Bojer ex Hook. – not accepted
  Euphorbia splendens ssp. bojeri (Hook.) Denis – not accepted
  Euphorbia splendens var. betsileana Leandri – not accepted
  Euphorbia splendens var. bevilaniensis (Croizat) Leandri – not accepted
  Euphorbia splendens var. bojeri (Hook.) Costantin & Gallaud – not accepted
  Euphorbia splendens var. breonii (Nois.) Leandri – not accepted
  Euphorbia splendens var. hislopii (N.E. Br.) Leandri – not accepted
  Euphorbia splendens var. imperatae Leandri – not accepted
  Euphorbia splendens var. tananarivae Leandri – not accepted
  Euphorbia splendens var. vulcani Leandri – not accepted
  Euphorbia spongiosa Ledeb. ex Schrank – not accepted
  Euphorbia spruceana Boiss. – accepted
  Euphorbia squamigera Loisel. – accepted
  Euphorbia squamigera ssp. clementei (Boiss.) Losa & Vindt – not accepted
  Euphorbia squamigera ssp. margalidiana (Kuhbier & Lewej.) O. Bolňs & Vigo – not accepted
  Euphorbia squamigera var. carthaginiensis (Porta & Rigo) O. Bolňs & Vigo – not accepted
  Euphorbia squamigera var. faurei Maire – not accepted
  Euphorbia squamigera var. mentagensis Maire – not accepted
  Euphorbia squamigera var. montgoi O. Bolňs & Vigo – not accepted
  Euphorbia squamigera var. pseudatlantica Maire – not accepted
  Euphorbia squamigera var. rupicola (Boiss.) Maire – not accepted
  Euphorbia squamosa Willd. – accepted
  Euphorbia squamosa var. serrata (Boiss.) Oudejans – not accepted
  Euphorbia squamosa var. talyschensis (Boiss. & Buhse) Oudejans – not accepted
  Euphorbia squamosa var. wilhelmsiana (K. Koch) Oudejans – not accepted
  Euphorbia squarrosa Haw. – not accepted
  Euphorbia standleyi (Millsp.) Oudejans – accepted
  Euphorbia stanfieldii (Small) Cory – not accepted
  Euphorbia stapelioides Boiss. – accepted
  Euphorbia stapfii A. Berger – accepted
  Euphorbia stegmatica Nel – not accepted
  Euphorbia stellata Willd. – accepted
  Euphorbia stellispina Haw. – accepted
  Euphorbia stellulata Salzm. – not accepted
  Euphorbia stenocaulis Bruyns – accepted
  Euphorbia stenoclada Baill. – accepted
  Euphorbia stenoclada ssp. ambatofinandranae (Leandri) Cremers – accepted
  Euphorbia stenoclada ssp. stenoclada Baill. – accepted
  Euphorbia stenomeres S.F. Blake – not accepted
  Euphorbia stenophylla (Klotzsch & Garcke) Boiss. – accepted
  Euphorbia stepposa Zoz – accepted
  Euphorbia stevenii F.M. Bailey – accepted
  Euphorbia stevensii A. Stewart – not accepted
  Euphorbia steyermarkii Standl. – not accepted
  Euphorbia stictospora Engelm. – accepted – slimseed sandmat, mat spurge, narrow-seeded spurge
  Euphorbia stictospora var. stictospora Engelm. – accepted
  Euphorbia stictospora var. sublaevis M.C. Johnst. – accepted
  Euphorbia stipitata Millsp. – not accepted
  Euphorbia stipulacea Engelm. ex Boiss. – not accepted
  Euphorbia stocksiana Boiss. – not accepted
  Euphorbia stocksiana var. ovata Boiss. – not accepted
  Euphorbia stoddartii Fosberg – accepted
  Euphorbia stokesii C.N. Forbes – not accepted
  Euphorbia stolonifera Marloth ex A.C. White, R.A. Dyer & B. Sloane – accepted
  Euphorbia stormiae Croizat – not accepted
  Euphorbia stracheyi Boiss. – accepted
  Euphorbia strangulata N.E. Br. – accepted
  Euphorbia striata Thunb. – accepted
  Euphorbia striata Boiss. – not accepted
  Euphorbia striata var. brachyphylla Boiss. – not accepted
  Euphorbia striata var. cuspidata Boiss. – accepted
  Euphorbia striata var. striata Thunb. – accepted
  Euphorbia striatella Boiss. – not accepted
  Euphorbia striatella var. microsciadia (Boiss.) Boiss. – not accepted
  Euphorbia striatella var. persepolitana (Boiss.) Boiss. – not accepted
  Euphorbia stricta L. – accepted
  Euphorbia stricta f. pubescens (Erdner) Oudejans – not accepted
  Euphorbia stricta ssp. micrantha (Stephan ex Willd.) Nyman – not accepted
  Euphorbia stricta var. dubia (Dierb.) Nyman – not accepted
  Euphorbia stricta var. pubescens Erdner – not accepted
  Euphorbia strictior Holz. – accepted – panhandle spurge
  Euphorbia strigosa Hook. & Arn. – accepted
  Euphorbia strobilifera Dalzell – not accepted
  Euphorbia stuhlmannii Pax – not accepted
  Euphorbia stuhlmannii Schweinf. ex Volkens – not accepted
  Euphorbia sturii Holuby ex Velen – not accepted
  Euphorbia stygiana H.C. Watson – accepted
  Euphorbia stygiana ssp. santamariae H. Schäf. – accepted
  Euphorbia stygiana ssp. stygiana H.C. Watson – accepted
  Euphorbia suareziana Croizat – not accepted
  Euphorbia subamplexicaulis Kar. & Kir. – accepted
  Euphorbia subapoda Baill. – not accepted
  Euphorbia subcaerulea B.L. Rob. & Greenm. – not accepted
  Euphorbia subcaerulea var. tresmariae Millsp. – not accepted
  Euphorbia subciliata Pers. – not accepted
  Euphorbia subcordata Ledeb. – accepted
  Euphorbia subcordata (Klotzsch & Garcke) Schur – not accepted
  Euphorbia subcordata var. eriophylla (Kar. & Kir.) Boiss. – not accepted
  Euphorbia subfalcata Hiern – not accepted
  Euphorbia subhastata Vis. & Pancic – not accepted
  Euphorbia submamillaris (A. Berger) A. Berger – not accepted
  Euphorbia suborbicularis Thulin – accepted
  Euphorbia subpeltata S. Watson – accepted
  Euphorbia subpeltatophylla Rauh – accepted
  Euphorbia subpubens Engelm. ex S. Watson – not accepted
  Euphorbia subreniformis S. Watson – accepted
  Euphorbia subsalsa Hiern – accepted
  Euphorbia subsalsa ssp. fluvialis L.C. Leach – accepted
  Euphorbia subsalsa ssp. subsalsa Hiern – accepted
  Euphorbia subsalsa var. kaokoensis A.C. White, R.A. Dyer & B. Sloane – not accepted
  Euphorbia subscandens P.R.O. Bally & S. Carter – accepted
  Euphorbia subserrata Engelm. ex Boiss. – not accepted
  Euphorbia subterminalis N.E. Br. – accepted
  Euphorbia subtilis (Prokh.) Prokh. – accepted
  Euphorbia subtrifoliata Rusby – accepted
  Euphorbia subtuberculata C.A. Mey. ex Boiss. – not accepted
  Euphorbia subulatifolia Hurus. – not accepted
  Euphorbia subumbellata Steud. ex Boiss. – not accepted
  Euphorbia succedanea L.C. Wheeler – accepted
  Euphorbia succulenta (Schweick.) Bruyns – accepted
  Euphorbia succulenta var. congesta (P.R.O. Bally) Bruyns – accepted
  Euphorbia succulenta var. succulenta (Schweick.) Bruyns – accepted
  Euphorbia sudanica A. Chev. – accepted
  Euphorbia suffruticosa Forssk. – not accepted
  Euphorbia suffruticulosa Lecoq & Lamotte – not accepted
  Euphorbia suffulta Bruyns – accepted
  Euphorbia sulcata Lens ex Loisel. – accepted
  Euphorbia sulcata Lem. ex Boiss. – not accepted
  Euphorbia sulcata var. maroccana Molero, Rovira & Vicens – not accepted
  Euphorbia sulphurea Pahlevani – accepted
  Euphorbia sultan-hassei Strid, Bentzer, Bothmer, Engstrand & M.A. Gust. – accepted
  Euphorbia sumati S. Carter – accepted
  Euphorbia sumbawensis Boiss. – accepted
  Euphorbia supina Raf. – not accepted
  Euphorbia surinamensis Lanj. – accepted
  Euphorbia susan-holmesiae Binojk. & Gopalan – accepted
  Euphorbia susannae Marloth – accepted
  Euphorbia suzannae-marnierae Rauh & Petignat – accepted
  Euphorbia sventenii Marcet – not accepted
  Euphorbia swatensis Kitam. – not accepted
  Euphorbia sylvatica L. – not accepted
  Euphorbia sylvatica subvar. purpurata Coss. & Germ. – not accepted
  Euphorbia sylvatica var. minor Gaudin – not accepted
  Euphorbia symmetrica A.C. White, R.A. Dyer & B. Sloane – not accepted
  Euphorbia synadenia Baill. – not accepted
  Euphorbia synadenium Ridl. – not accepted
  Euphorbia syncalycina Bruyns – accepted
  Euphorbia syncameronii Bruyns – accepted
  Euphorbia syriaca Spreng. – not accepted
  Euphorbia syrmiensis Kit. – not accepted
  Euphorbia syspirensis K. Koch – not accepted
  Euphorbia systyla Edgew. – accepted
  Euphorbia systyloides Pax – accepted
  Euphorbia systyloides ssp. porcaticapsa S. Carter – accepted
  Euphorbia systyloides ssp. systyloides Pax – accepted
  Euphorbia systyloides var. hebecarpa (Pax) N.E. Br. – not accepted
  Euphorbia systyloides var. lata N.E. Br. – not accepted
  Euphorbia systyloides var. pedunculata N.E. Br. – not accepted
  Euphorbia szechuanica Pax & K. Hoffm. – not accepted
  Euphorbia szovitsii Fisch. & C.A. Mey. – accepted
  Euphorbia szovitsii var. kharputensis Azn. ex M.S. Khan – accepted
  Euphorbia szovitsii var. szovitsii Fisch. & C.A. Mey. – accepted
  Euphorbia taboraensis A. Hässl. – accepted
  Euphorbia tacnensis Phil. – accepted
  Euphorbia taifensis Fayed & D. Al-Zahrani – accepted – Amaq, Amaqah, Amaqat al-ghanam
  Euphorbia taihsiensis (Chaw & Koutnik) Oudejans – accepted
  Euphorbia taitensis Boiss. – not accepted
  Euphorbia taitensis Pax – not accepted
  Euphorbia taitensis var. stenhymenia Boiss. – not accepted
  Euphorbia taiwaniana S.S. Ying – not accepted
  Euphorbia takouensis H. Lév. & Vaniot – not accepted
  Euphorbia talaina Radcl.-Sm. – accepted
  Euphorbia talastavica (Prokh.) Prokh. – accepted
  Euphorbia taluticola Wiggins – accepted
  Euphorbia talyschensis Boiss. & Buhse – not accepted
  Euphorbia tamanduana Boiss. – accepted
  Euphorbia tamaulipasana (Millsp.) Oudejans – accepted
  Euphorbia tanaensis P.R.O. Bally & S. Carter – accepted
  Euphorbia tanaicensis Guss. – not accepted
  Euphorbia tanaitica Pacz. – not accepted
  Euphorbia tangutica Prokh. – not accepted
  Euphorbia tannensis Spreng. – accepted
  Euphorbia tannensis ssp. eremophila (A. Cunn. ex Hook.) D.C. Hassall – accepted
  Euphorbia tannensis ssp. tannensis Spreng. – accepted
  Euphorbia tannensis var. eremophila (A. Cunn. ex Hook.) D.C. Hassall – not accepted
  Euphorbia tannensis var. finlaysonii (J.M. Black) D.C. Hassall – not accepted
  Euphorbia tanquahuete Sessé & Moç. – accepted – Leche Maria, Palo cucaracha, Palo mulato, Palo amarillo
  Euphorbia taourirtensis Batt. & Trab. – not accepted
  Euphorbia taquetii H. Lév. & Vaniot – not accepted
  Euphorbia tarapacana Phil. – accepted
  Euphorbia tardieuana Leandri – accepted
  Euphorbia tarokoensis Hayata – not accepted
  Euphorbia taruensis S. Carter – accepted
  Euphorbia tashiroi Hayata – not accepted
  Euphorbia tatarica Jacquem. ex Boiss. – not accepted
  Euphorbia tatianae Fed. – not accepted
  Euphorbia taurica (Besser) Steud. – not accepted
  Euphorbia tauricola Prokh. – accepted
  Euphorbia taurinensis All. – accepted
  Euphorbia taurinensis f. isophylla (K. Malý) Kuzmanov – not accepted
  Euphorbia taurinensis var. brachyceras (Candargy) Oudejans – not accepted
  Euphorbia taurinensis var. isophylla (K. Malý) Oudejans – not accepted
  Euphorbia tavoyensis N.P. Balakr. – accepted
  Euphorbia taxifolia Burm. f. – not accepted
  Euphorbia tchen-ngoi (Soják) Radcl.-Sm. – not accepted
  Euphorbia teheranica Boiss. – accepted
  Euphorbia tehuacana (Brandegee) V.W. Steinm. – accepted
  Euphorbia teixeirae L.C. Leach – accepted
  Euphorbia teke Schweinf. ex Pax – accepted
  Euphorbia telephioides Chapm. – accepted – Telephus spurge
  Euphorbia tenax Burch. – accepted
  Euphorbia tenella Pax – not accepted
  Euphorbia tenella Kunth – not accepted
  Euphorbia tenera S. Watson – not accepted
  Euphorbia tenuicaulis Range – not accepted
  Euphorbia tenuicuspis Guss. ex Rchb. – not accepted
  Euphorbia tenuirama Schweinf. ex A. Berger – accepted
  Euphorbia tenuis Buch.-Ham. ex D. Don – not accepted
  Euphorbia tenuispinosa Gilli – accepted
  Euphorbia tenuispinosa var. robusta P.R.O. Bally & S. Carter – accepted
  Euphorbia tenuispinosa var. tenuispinosa Gilli – accepted
  Euphorbia tenuissima M.E. Jones – not accepted
  Euphorbia teres M. Machado & Hofacker – accepted
  Euphorbia terracina L. – accepted – Geraldton carnation weed, Terracina spurge, carnation spurge
  Euphorbia terracina Lag. – not accepted
  Euphorbia terracina f. angustifolia Batt. – not accepted
  Euphorbia terracina var. alexandrina (Delile) El-Kanemy – not accepted
  Euphorbia terracina var. delortii Timb.-Lagr. ex Nyman – not accepted
  Euphorbia terracina var. ecarunculata Boiss. – not accepted
  Euphorbia terracina var. mendax (Maire & Wilczek) Maire – not accepted
  Euphorbia terracina var. modesta (Boiss.) Boiss. – not accepted
  Euphorbia terracina var. ramosissima (Loisel.) Nyman – not accepted
  Euphorbia terracina var. variicornis Maire & Sennen – not accepted
  Euphorbia tescorum S. Carter – accepted
  Euphorbia teskensuensis Orazova – accepted
  Euphorbia tessellata (Haw.) Steud. – not accepted
  Euphorbia tetracantha Rendle – accepted
  Euphorbia tetracantha Pax – not accepted
  Euphorbia tetracanthoides Pax – accepted
  Euphorbia tetraceras Lange – not accepted
  Euphorbia tetragona Haw. – accepted
  Euphorbia tetrapora Engelm. – accepted – weak spurge
  Euphorbia tetrapora var. berlandieri Boiss. – not accepted
  Euphorbia tetraptera Baker – accepted
  Euphorbia tetraptera var. robusta Leandri – accepted
  Euphorbia tetraptera var. tetraptera Baker – accepted