Lisitry ny karazana Euphorbia

Inty ny **lisitry ny karazana ''Euphorbia***. Vondrona misy anarana miisa 5&nbsp;000 eo ho eo no ekena, izay ahitana ny karazana *Euphorbia* sy ny zana-karazana fantara indrindra. Ity lisitra ity dia ahitana ny karazana tao amin' ny vondron-karazana *Chamaesyce* teo aloha (izay tsy mbola nekena amin' ny ankapobeny), ary koa ny vondron-karazana *Elaeophorbia*, *Endadenium*, *Monadenium*, *Synadenium* ary *Pedilanthus* izay samy nampidirina ao anatin' ny *Euphorbia* avokoa araka ny fanadihadiana filôjenetika. Ny anaran-javamaniry mitahiry ranony dia nasiana marika (s).

== A ==

* *Euphorbia aaron-rossii* <small>A.H. Holmgren & N.H. Holmgren</small> 
* *Euphorbia abdelkuri* <small>Balf.f.</small> (s)
* *Euphorbia abdita* <small>(Burch.) Radcl.-Sm.</small>
* *Euphorbia abdulghafooriana* <small>Abedin</small>
* *Euphorbia abramsiana* <small>L.C. Wheeler</small> 
* *Euphorbia abyssinica* <small>J.F. Gmel.</small> (s)
* *Euphorbia acalyphoides* <small>Hochst. ex Boiss.</small>
** *Euphorbia acalyphoides* subsp. *acalyphoides*
** *Euphorbia acalyphoides* subsp. *cicatricosa* <small>S.Carter</small>
* *Euphorbia acanthodes* <small>Akhani</small> (s)
* *Euphorbia acanthothamnos* <small>Heldr. & Sart.</small>  (s)
* *Euphorbia acerensis* <small>Boiss.</small>
* *Euphorbia acervata* <small>S.Carter</small> (s)
* *Euphorbia actinoclada* <small>S.Carter</small> (s)
* *Euphorbia aculeata* <small>Forssk.</small> (s)
* *Euphorbia acuta* <small>Engelm.</small>
* *Euphorbia adenochila* <small>S.Carter</small> (s)
* *Euphorbia adenochlora* <small>C.Morren & Decne.</small>
* *Euphorbia adenopoda* <small>Baillon</small> (s)
** *Euphorbia adenopoda* subsp. *adenopoda* (s)
** *Euphorbia adenopoda* subsp. *canescens* <small>(Proctor) Oudejans</small> (s)
** *Euphorbia adenopoda* subsp. *gundlachii* <small>(Urb.) Oudejans</small> (s)
** *Euphorbia adenopoda* subsp. *pergamena* <small>(Small) Oudejans</small> (s)
* *Euphorbia adenoptera* <small>Bertol.</small>
* *Euphorbia adiantoides* <small>Lam.</small>
* *Euphorbia adjurana* <small>P.R.O.Bally & S.Carter</small> (s)
* *Euphorbia aellenii* <small>Rech.f.</small>
* *Euphorbia aequoris* <small>N.E.Br.</small> (s)
* *Euphorbia aeruginosa* <small>Schweick.</small> (s)
* *Euphorbia aggregata* <small>A.Berger</small> (s)
** *Euphorbia aggregata* var. *aggregata* (s)
** *Euphorbia aggregata* var. *alternicolor* <small>(N.E.Br.) A.C.White, R.A.Dyer & B.Sloane</small> (s)
* *Euphorbia agowensis* <small>Hochst. ex Boiss.</small> (s)
** *Euphorbia agowensis* var. *agowensis* (s)
** *Euphorbia agowensis* var. *pseudoholstii* <small>(Pax) P.R.O.Bally & S.Carter</small> (s)
* *Euphorbia agraria* <small>M.Bieb.</small>  
** *Euphorbia agraria* var. *agraria*
** *Euphorbia agraria* var. *euboea* <small>(Halácsy) Hayek</small>
** *Euphorbia agraria* var. *subhastata* <small>(De Vis) Griseb.</small>
* *Euphorbia akenocarpa* <small>Guss.</small>
* *Euphorbia alaica* <small>(Prokh.) Prokh.</small>
* *Euphorbia alainii* <small>Oudejans</small>
* *Euphorbia alata* <small>Hook.</small> (s)
* *Euphorbia alatavica* <small>Boiss.</small>
* *Euphorbia alatocaulis* <small>V.W.Steinm. & Felger</small>
* *Euphorbia albanica* <small>N.E.Br.</small> (s)
* *Euphorbia albertensis* <small>N.E.Br.</small> (s)
* *Euphorbia albiflora* <small>Taub.</small>
* *Euphorbia albipollinifera* <small>L.C.Leach</small> (s)
* *Euphorbia albomarginata* 
* *Euphorbia alcicornis* <small>Baker</small> (s)
* *Euphorbia aleppica* <small>L.</small>
** *Euphorbia aleppica* var. *aleppica*
** *Euphorbia aleppica* var. *prostrata* <small>Kasapligil</small>
* *Euphorbia alfredii* <small>Rauh</small> (s)
* *Euphorbia allocarpa* <small>S.Carter</small>
* *Euphorbia alluaudii* <small>Drake</small>
* *Euphorbia alpina* <small>C.A.Mey. ex Ledeb.</small>
** *Euphorbia alpina* var. *alpina*
** *Euphorbia alpina* var. *rupicola* <small>Baikov</small>
* *Euphorbia alsiniflora* <small>Baillon</small>
* *Euphorbia alsinifolia* <small>Boiss.</small>
* *Euphorbia alsinoides* <small>Miq.</small>
* *Euphorbia alta* <small>Norton</small>
* *Euphorbia altaica* <small>C.A.Mey. ex Ledeb.</small>
** *Euphorbia altaica* var. *altaica*
** *Euphorbia altaica* var. *pilosa* <small>Stschegl.</small>
** *Euphorbia altaica* var. *sajanensis* <small>Boiss.</small>
* *Euphorbia altissima* <small>Boiss.</small>
** *Euphorbia altissima* var. *altissima*
** *Euphorbia altissima* var. *glabrescens* <small>M.S.Khan</small>
* *Euphorbia altotibetica* <small>Paulsen ex Ostenf. & Paulsen</small>
* *Euphorbia amandii* <small>Oudejans</small>
* *Euphorbia amarifontana* <small>N.E.Br.</small> (s)
* *Euphorbia ambacensis* <small>N.E.Br.</small>
* *Euphorbia ambarivatoensis* <small>Rauh & Bard.-Vauc.</small> (s)
* *Euphorbia ambovombensis* <small>Rauh & Razaf.</small> (s)
** *Euphorbia ambovombensis* var. *ambovombensis* (s)
** *Euphorbia ambovombensis* var. *ambatomenaensis* <small>Rebmann</small> (s)
* *Euphorbia ambroseae* <small>L.C.Leach</small> (s)
** *Euphorbia ambroseae* var. *ambroseae* (s)
** *Euphorbia ambroseae* var. *spinosa* <small>L.C.Leach</small> (s)
* *Euphorbia ambukensis* <small>Stepanov</small>
* *Euphorbia amicorum* <small>S.Carter</small> (s)
* *Euphorbia ammak* <small>Schweinf.</small> (s)
* *Euphorbia ammatotricha* <small>Boiss.</small>
* *Euphorbia ammophila* <small>S.Carter & Dioli</small>
* *Euphorbia amphimalaca* <small>Standl.</small>
* *Euphorbia amplexicaulis* <small>Hook.f.</small>
* *Euphorbia ampliphylla* <small>Pax</small> (s)
* *Euphorbia amygdaloides* <small>L.</small>
** *Euphorbia amygdaloides* subsp. *amygdaloides*
*** *Euphorbia amygdaloides* subsp. *amygdaloides* var. *amygdaloides*
*** *Euphorbia amygdaloides* subsp. *amygdaloides* var. *ligulata* <small>(Chaub.) Boiss. 1862</small>
** *Euphorbia amygdaloides* subsp. *arbuscula* <small>Meusel</small>
** *Euphorbia amygdaloides* subsp. *heldreichii* <small>(Orph. ex Boiss.) Aldén</small>
** *Euphorbia amygdaloides* subsp. *robbiae* <small>(Turrill) Radcl.-Sm.</small>
** *Euphorbia amygdaloides* subsp. *semiperfoliata* <small>(Viv.) Radcl.-Sm.</small>
* *Euphorbia anacampseros* <small>Boiss.</small>
** *Euphorbia anacampseros* var. *anacampseros*
** *Euphorbia anacampseros* var. *tmolea* <small>M.S.Khan</small>
* *Euphorbia anachoreta* <small>Svent.</small> (s)
* *Euphorbia analalavensis* <small>Leandri1966</small> (s)
* *Euphorbia analamerae* <small>Leandri1945</small>
* *Euphorbia analavelonensis* <small>Rauh & Mangelsdorff</small> (s)
* *Euphorbia andrachnoides* <small>Schrenk</small>
* *Euphorbia androsaemifolia* <small>Willd. ex Schltdl.</small>
* *Euphorbia angrae* <small>N.E.Br.</small> (s)
* *Euphorbia angularis* <small>Klotzsch</small> (s)
* *Euphorbia angulata* <small>Jacq.</small>
* *Euphorbia angusta* <small>Engelm.</small> (s)
* *Euphorbia angustiflora* <small>Pax</small> (s)
* *Euphorbia anisopetala* <small>(Prokh.) Prokh.</small>
* *Euphorbia ankaranae* <small>Leandri</small> (s)
* *Euphorbia ankarensis* <small>Boiteau</small> (s)
* *Euphorbia ankazobensis* <small>Rauh & Hofstätter</small> (s)
* *Euphorbia annamarieae* <small>Rauh</small> (s)
* *Euphorbia anoplia* <small>Stapf</small> (s)
* *Euphorbia anthonyi* <small>Brandegee</small> (= *Chamaesyce anthonyi*)
* *Euphorbia anthula* <small>Lavrent. & Papan.</small>
* *Euphorbia antilibanotica* <small>Mouterde</small>
* *Euphorbia antiquorum* <small>L.</small> (s)
* *Euphorbia antisyphilitica*  – "Candelilla", "wax plant" (s)
* *Euphorbia antonii* <small>Oudejans</small>
* *Euphorbia antso* <small>Denis</small> (s)
* *Euphorbia anychioides* <small>Boiss.</small>
* *Euphorbia apatzingana* <small>McVaugh</small>
* *Euphorbia aphylla* <small>Brouss. ex Willd.</small> – Leafless spurge, tolda (s)
* *Euphorbia apicata* <small>L.C.Wheeler</small>
* *Euphorbia apios* <small>L.</small>
* *Euphorbia apocynoides* <small>Klotzsch</small>
* *Euphorbia appariciana* <small>Rizzini</small>
* *Euphorbia appendiculata* <small>P.R.O.Bally & S.Carter ex S.Carter</small>
* *Euphorbia applanata* <small>Thulin & Al-Gifri</small>
* *Euphorbia aprica* <small>Baillon</small> (s)
* *Euphorbia apurimacensis* <small>Croizat</small>
* *Euphorbia arabica* <small>Hochst. & Steud. ex T.Anderson</small>
* *Euphorbia arabicoides* <small>N.E.Br.</small>
* *Euphorbia arahaka* <small>H.Poisson</small> (s)
* *Euphorbia araucana* <small>Phil.</small>
* *Euphorbia arbuscula* <small>Balf.f.</small> (s)
** *Euphorbia arbuscula* var. *arbuscula* (s)
** *Euphorbia arbuscula* var. *Montana* <small>Balf.f.</small> (s)
* *Euphorbia arceuthobioides* <small>Boiss.</small> (s)
* *Euphorbia ardonensis* <small>Galushko</small>
* *Euphorbia arenaria* <small>Kunth</small>
* *Euphorbia arenarioides* <small>Gagnep.</small>
* *Euphorbia argillosa* <small>Chodat & E.Hassler</small>
* *Euphorbia arguta* <small>Banks & Sol.</small>
** *Euphorbia arguta* var. *arguta*
** *Euphorbia arguta* var. *dasycarpa* <small>Plitmann</small>
* *Euphorbia arida* <small>N.E.Br.</small> (s)
* *Euphorbia ariensis* <small>Kunth</small>
** *Euphorbia ariensis* var. *ariensis*
** *Euphorbia ariensis* var. *villicaulis* <small>Fernald</small>
* *Euphorbia aristata* <small>Schmalh.</small>
* *Euphorbia arizonica* <small>Engelm.</small>
* *Euphorbia armena* <small>Prokh.</small>
* *Euphorbia armourii* <small>Millsp.</small>
* *Euphorbia armstrongiana* <small>Boiss.</small>
* *Euphorbia arnottiana* <small>Endl.</small>
* *Euphorbia arrecta* <small>N.E.Br. ex R.E.Fr.</small> (s)
* *Euphorbia arteagae* <small>W.R.Buck & Huft</small> (s)
* *Euphorbia articulata* <small>Burm.</small> (s)
* *Euphorbia artifolia* <small>N.E.Br.</small>
* *Euphorbia arundelana* <small>Bartlett</small>
* *Euphorbia arvalis* <small>Boiss. & Heldr. ex Boiss.</small>
** *Euphorbia arvalis* subsp. *arvalis*
** *Euphorbia arvalis* subsp. *longistyla* <small>(Litard. & Maire) Molero, Rovira & J.Vicens</small>
* *Euphorbia asclepiadea* <small>Milne-Redh.</small> (s)
* *Euphorbia aserbajdzhanica* <small>Bordz.</small>
* *Euphorbia aspericaulis* <small>Pax</small> (s)
* *Euphorbia asthenacantha* <small>S.Carter</small> (s)
* *Euphorbia astroites* <small>Fisch. & C.A.Mey.</small>
* *Euphorbia astrophora* <small>Marx</small> (s)
* *Euphorbia astyla* <small>Engelm. ex Boiss.</small>
* *Euphorbia atlantis* <small>Maire</small>
** *Euphorbia atlantis* var. *atlantis*
** *Euphorbia atlantis* var. *leiocarpa* <small>(Boiss.) Oudejans</small>
** *Euphorbia atlantis* var. *major* <small>(Boiss.) Oudejans</small>
* *Euphorbia atoto* <small>G.Forst.</small> (s)
* *Euphorbia atrispina* <small>N.E.Br.</small> (s)
** *Euphorbia atrispina* var. *atrispina* (s)
** *Euphorbia atrispina* var. *viridis* <small>A.C.White, R.A.Dyer & B.Sloane</small> (s)
* *Euphorbia atrocarmesina* <small>L.C.Leach</small> (s)
** *Euphorbia atrocarmesina* subsp. *arborea* <small>L.C.Leach</small> (s)
** *Euphorbia atrocarmesina* subsp. *atrocarmesina* (s)
* *Euphorbia atrococca* <small>A.Heller</small>
* *Euphorbia atroflora* <small>S.Carter</small> (s)
* *Euphorbia atropurpurea* <small>Brouss. ex Willd.</small> (s)
** *Euphorbia atropurpurea* var. *atropurpurea* (s)
*** *Euphorbia atropurpurea* var. *atropurpurea* f. *atropurpurea* (s)
*** *Euphorbia atropurpurea* var. *atropurpurea* f. *lutea* <small>A.Santos</small> (s)
** *Euphorbia atropurpurea* var. *modesta* <small>Svent.</small> (s)
* *Euphorbia atrox* <small>S.Carter</small> (s)
* *Euphorbia attastoma* <small>Rizzini</small> (s)
** *Euphorbia attastoma* var. *attastoma* (s)
** *Euphorbia attastoma* var. *xanthochlora* <small>Rizzini</small> (s)
* *Euphorbia aucheri* <small>Boiss.</small>
* *Euphorbia aulacosperma* <small>Boiss.</small>
* *Euphorbia aureoviridiflora* <small>(Rauh) Rauh</small> (s)
* *Euphorbia auricularia* <small>Boiss.</small>
* *Euphorbia australis* <small>Boiss.</small>
* *Euphorbia austriaca* <small>A.Kern.</small>
* *Euphorbia austroanatolica* <small>Hub.Mor. & M.S.Khan ex M.S.Khan</small>
* *Euphorbia avasmontana* <small>Dinter</small> (s)
** *Euphorbia avasmontana* var. *avasmontana* (s)
** *Euphorbia avasmontana* var. *sagittaria* <small>(Marloth) A.C.White, R.A.Dyer & B.Sloane</small> (s)
* *Euphorbia awashensis* <small>M.G.Gilbert</small> (s)
* *Euphorbia azorica* <small>Hochst. ex Seub.</small> - endemic to the archipelago of the Azores

== B ==

* *Euphorbia baga* <small>A.Chev.</small> (s)
** *Euphorbia baga var. baga* (s)
** *Euphorbia baga var. parviflora* <small>L.E.Newton</small> (s)
* *Euphorbia bahiensis* <small>(Klotzsch & Garcke ex Klotzsch) Boiss.</small>
* *Euphorbia baioensis* <small>S.Carter</small> (s)
* *Euphorbia balakrishnanii* <small>Binojk. & Gopalan</small>
* *Euphorbia balearica* <small>(Willk.) A.M.Romo</small>
* *Euphorbia baleensis* <small>M.G.Gilbert</small>
* *Euphorbia balbisii* <small>Boiss.</small>
* *Euphorbia baliola* <small>N.E.Br.</small> (s)
* *Euphorbia ballyana* <small>Rauh</small> (s)
* *Euphorbia ballyi* <small>S.Carter</small> (s)
* *Euphorbia balsamifera* <small>Aiton</small> (s)
** *Euphorbia balsamifera subsp. adenensis* <small>(Deflers) P.R.O.Bally</small> (s)
** *Euphorbia balsamifera subsp. balsamifera* (s)
* *Euphorbia banae* <small>Rauh</small> (s)
* *Euphorbia baradii* <small>S.Carter</small> (s)
* *Euphorbia barbicarina* <small>(Millsp.) Standl.</small>
* *Euphorbia barbicollis* <small>P.R.O.Bally</small> (s)
* *Euphorbia bariensis* <small>S.Carter</small> (s)
* *Euphorbia barkeri* <small>Urb. & Ekman ex Urb.</small>
* *Euphorbia barnardii* <small>A.C.White, R.A.Dyer & B.Sloane</small> (s)
* *Euphorbia barnesii* <small>(Millsp.) Oudejans</small>
* *Euphorbia barnhartii* <small>Croizat</small> (s)
* *Euphorbia barrelieri* <small>Savi</small>
* *Euphorbia bartolomaei* <small>Greene</small>
* *Euphorbia basarabica* <small>Prodan</small>
* *Euphorbia baselicis* <small>Ten.</small>
* *Euphorbia baueri* <small>Engelm. ex Boiss.</small>
* *Euphorbia baumii* <small>Pax</small>
* *Euphorbia baxanica* <small>Galushko</small>
* *Euphorbia bayeri* <small>L.C.Leach</small> (s)
* *Euphorbia baylissii* <small>L.C.Leach</small> (s)
* *Euphorbia beamanii* <small>M.C.Johnst.</small>
* *Euphorbia beharensis* <small>Leandri</small> (s)
** *Euphorbia beharensis var. adpressifolia* <small>Rauh</small> (s)
** *Euphorbia beharensis var. beharensis* (s)
** *Euphorbia beharensis var. gullemetii* <small>(Ursch & Leandri) Rauh</small> (s)
** *Euphorbia beharensis var. squarrosa* <small>Rauh</small> (s)
** *Euphorbia beharensis var. truncata* <small>Rauh</small> (s)
* *Euphorbia beillei* <small>A.Chev.</small> (s)
* *Euphorbia bellica* <small>Hiern</small>
* *Euphorbia bemarahaensis* <small>Rauh & Mangelsdorff</small> (s)
* *Euphorbia benthami* <small>Hiern</small>
* *Euphorbia bergeri* <small>N.E.Br.</small> (s)
* *Euphorbia bergii* <small>A.C.White, R.A.Dyer & B.Sloane</small> (s)
* *Euphorbia berorohae* <small>Rauh & Hofstätter</small> (s)
* *Euphorbia berotica* <small>N.E.Br.</small> (s)
* *Euphorbia bertemariae* <small>Bisseret & Dioli</small> (s)
* *Euphorbia berteroana* <small>Balb. ex Spreng.</small>
* *Euphorbia berthelotii* <small>Bolle ex Boiss.</small> (s)
* *Euphorbia berythae* <small>Boiss. & Blanche ex Boiss.</small>
* *Euphorbia bessarabica* <small>Klokov</small>
* *Euphorbia besseri* <small>(Klotzsch & Garcke ex Klotzsch) Boiss.</small>
* *Euphorbia betacea* <small>Baillon</small> (s)
* *Euphorbia betulicortex* <small>M.G.Gilbert</small> (s)
* *Euphorbia bevilaniensis* <small>Croizat</small>
* *Euphorbia biaculeata* <small>Denis</small> (s)
* *Euphorbia bianoensis* <small>(Malaisse & Lecron) Bruyns</small> (s) (= *Monadenium bianoense*)
* *Euphorbia bicapitata* <small>Brandegee</small>
* *Euphorbia bicolor* <small>Engelm. & A.Gray</small> - Snow-on-the-prairie
* *Euphorbia bicompacta* <small>Bruyns</small> (s) (= *Synadenium compactum*)
** *Euphorbia bicompacta var. bicompacta* (s) (= *Synadenium compactum* var. *compactum*)
** *Euphorbia bicompacta var. rubra* <small>(S.Carter) Bruyns 2006</small> (s) (= *Synadenium compactum* var. *rubrum*)
* *Euphorbia biconvexa* <small>Domin</small>
* *Euphorbia bifida*<small>Hook. & Arn.</small>
* *Euphorbia bifurcata* <small>Engelm.</small> 
* *Euphorbia biharamulensis* <small>S.Carter</small> (s)
* *Euphorbia bilobata* <small>Engelm.</small> 
* *Euphorbia biramensis* <small>Urb.</small>
* *Euphorbia biselegans* <small>Bruyns</small> (s) (= *Monadenium elegans*)
* *Euphorbia bisellenbeckii* <small>Bruyns</small> (s) (= *Monadenium ellenbecki*)
* *Euphorbia bisglobosa* <small>Bruyns</small> (s) (= *Monadenium globosum*)
* *Euphorbia bitataensis* <small>M.G.Gilbert</small> (s)
* *Euphorbia biumbellata* <small>Poir.</small> (s)
* *Euphorbia biuncialis* <small>McVaugh</small>
* *Euphorbia bivonae* <small>Steud.</small> (s)
** *Euphorbia bivonae subsp. bivonae* (s)
** *Euphorbia bivonae subsp. tunetana* <small>Murb.</small> (s)
* *Euphorbia blatteri* <small>Oudejans</small>
* *Euphorbia blepharophylla* <small>C.A.Mey.</small> (s)
* *Euphorbia bodenghieniae* <small>(Malaisse & Lecron) Bruyns</small> (s) (= *Monadenium bodenghieniae*)
* *Euphorbia blodgettii* <small>Engelm. ex Hitchc.</small>
* *Euphorbia boerrhavifolia* <small>(Klotzsch & Garcke ex Klotzsch) Boiss.</small>
* *Euphorbia boetica* <small>Boiss.</small>
* *Euphorbia boinensis* <small>Denis ex Humbert & Leandri</small> (s)
* *Euphorbia boissieri* <small>Baillon</small> (s)
* *Euphorbia boissieriana* <small>(Woronow) Prokh.</small>
* *Euphorbia boiteaui* <small>Leandri</small> 1946(s)
* *Euphorbia boivinii* <small>Boiss.</small>
* *Euphorbia boliviana* <small>Rusby</small>
* *Euphorbia bolosii* <small>(Molero & Rovira) Molero & Rovira</small>
* *Euphorbia bolusii* <small>N.E.Br.</small> (s)
* *Euphorbia bombensis* <small>Jacq.</small>
* *Euphorbia bongensis* <small>Kotschy & Peyr. ex Boiss.</small> (s)
* *Euphorbia bongolavensis* <small>Rauh</small> (s)
* *Euphorbia bonpaldii* <small>Sweet</small>
* *Euphorbia boophthona* <small>C.A.Gardner</small>
* *Euphorbia borbonica* <small>Boiss.</small>
* *Euphorbia borealis* <small>Baikov</small>
* *Euphorbia borenensis* <small>M.G.Gilbert ex S.Carter & M.G.Gilbert</small> (s)
* *Euphorbia borodini* <small>Sambuk</small>
* *Euphorbia bosseri* <small>Leandri</small> (s)
* *Euphorbia bothae* <small>Lotsy & Goddijn</small> (hybrid) (s)
* *Euphorbia bottae* <small>Boiss. 1862</small> (s)
* *Euphorbia bougheyi* <small>L.C.Leach</small> (s)
* *Euphorbia bouleyi* <small>S.Moore</small>
* *Euphorbia bourgaeana* <small>J.Gay ex Boiss.</small> (s)
* *Euphorbia brachiata* <small>(Klotzsch & Garcke) E.Mey. ex Boiss.</small> (s)
* *Euphorbia brachycera* <small>Engelm.</small> - Horned spurge
* *Euphorbia brachyphylla* <small>Denis</small>
* *Euphorbia bracteata* <small>Jacq.</small> (s) (= *Pedilanthus bracteatus*)
* *Euphorbia bracteolaris* <small>Boiss.</small>
* *Euphorbia brakdamensis* <small>N.E.Br.</small> (s)
* *Euphorbia brandegei* <small>Millsp.</small>
* *Euphorbia brassii* <small>P.I.Forst.</small> (s)
* *Euphorbia braunsii* <small>N.E.Br.</small> (s)
* *Euphorbia bravoana* <small>Svent.</small> (s)
* *Euphorbia breviarticulata* <small>Pax</small> (s)
** *Euphorbia breviarticulata var. breviarticulata* (s)
** *Euphorbia breviarticulata var. trunciformis* <small>S.Carter</small> (s)
* *Euphorbia brevicornu* <small>Pax</small>
* *Euphorbia brevirama* <small>N.E.Br.</small> (s)
* *Euphorbia brevis* <small>N.E.Br.</small> (s)
* *Euphorbia brevitorta* <small>P.R.O.Bally</small> (s)
* *Euphorbia briquetii* <small>Emb. & Maire</small>
* *Euphorbia brittonii* <small>Millsp.</small> (s)
* *Euphorbia broteri* <small>Daveau</small>
* *Euphorbia brownii* <small>Baillon</small>
* *Euphorbia brunellii* <small>Chiov.</small> (s)
* *Euphorbia bruntii* <small>(Proctor) Oudejans</small>
* *Euphorbia bruynsii* <small>L.C.Leach</small> (s)
* *Euphorbia bryophylla* <small>Donn.Sm.</small>
* *Euphorbia bubalina* <small>Boiss.</small> (s)
* *Euphorbia buchtormensis* <small>C.A.Mey. ex Ledeb.</small>
* *Euphorbia buhsei* <small>Boiss.</small>
* *Euphorbia bulbispina* <small>Rauh & & Razaf.</small> (s)
* *Euphorbia bulleyana* <small>Diels</small>
* *Euphorbia bungei* <small>Boiss.</small>
* *Euphorbia bupleurifolia* <small>Jacq.</small> (s)
* *Euphorbia bupleuroides* <small>Desf.</small>
* *Euphorbia burchellii* <small>Müll.Arg.</small>
* *Euphorbia burgeri* <small>M.G.Gilbert</small>;; (s)
* *Euphorbia burmanica* <small>Hook.f.</small>
* *Euphorbia burmannii* <small>(Klotzsch & Garcke) E.Mey. ex Boiss.</small> (s)
* *Euphorbia buruana* <small>Pax</small> (s)
* *Euphorbia buschiana* <small>Grossh.</small>
* *Euphorbia bussei* <small>Pax</small> (s)
** *Euphorbia bussei var. bussei* (s)
** *Euphorbia bussei var. kibwezensis* <small>(N.E.Br.) S.Carter</small> (s)
* *Euphorbia buxoides* <small>Radcl.-Sm.</small> (s)
* *Euphorbia bwambensis* <small>S.Carter</small> (s)

== C ==

* *Euphorbia cactus* <small>Ehrenb. ex Boiss.</small> (s)
** *Euphorbia cactus var. cactus* (s)
** *Euphorbia cactus var. tortirama* <small>Rauh & Lavranos</small> (s)
* *Euphorbia caducifolia* <small>Haines</small> (s)
* *Euphorbia caecorum* <small>Mart. ex Boiss.</small>
* *Euphorbia caeladenia* <small>Boiss.</small>
* *Euphorbia caerulans* <small>Pax</small> (s)
* *Euphorbia caesia* <small>Kar. & Kir.</small>
* *Euphorbia caespitosa* <small>Lam.</small> (s)
* *Euphorbia calabarica* <small>Burkill</small>
* *Euphorbia calamiformis* <small>P.R.O.Bally & S.Carter</small>
* *Euphorbia calcarata* <small>(Schltdl.) V.W.Steinm.</small> (s) (= *Pedilanthus calcaratus*)
* *Euphorbia calcicola* <small>Fernald</small>
* *Euphorbia californica* <small>Benth.</small> (s)
** *Euphorbia californica var. californica* (s)
** *Euphorbia californica var. hindsiana* <small>(Benth.) Wiggins</small> (s)
* *Euphorbia caloderma* <small>S.Carter</small> (s)
* *Euphorbia calonesica* <small>Croizat</small>
* *Euphorbia calva* <small>N.E.Br.</small>
* *Euphorbia calyculata* <small>Kunth</small> (s)
* *Euphorbia calyptrata* <small>Coss. & Durieu ex Coss. & Kralik</small>
* *Euphorbia camagueyensis* <small>(Millsp.) Urb.</small>
* *Euphorbia cameronii* <small>N.E.Br.</small> (s)
* *Euphorbia canariensis* <small>L.</small> (s) - Canary Island spurge
* *Euphorbia candelabrum* <small>(Kotschy</small> (s)
** *Euphorbia candelabrum var. bilocularis* <small>(N.E.Br.) S.Carter</small> (s)
** *Euphorbia candelabrum var. candelabrum* (s)
* *Euphorbia cannellii* <small>L.C.Leach</small> (s)
* *Euphorbia capansa* <small>Ducke</small>
* *Euphorbia caperonioides* <small>R.A.Dyer & P.G.Meyer</small>
* *Euphorbia capillaris* <small>Gagnep.</small>
* *Euphorbia capitellata* <small>Engelm.</small>
* *Euphorbia capitulata* <small>Rchb.</small>
* *Euphorbia capmanambatoensis* <small>Rauh</small> (s)
* *Euphorbia cap-saintemariensis* <small>Rauh</small> (s)
* *Euphorbia capuronii* <small>Ursch & Leandri</small> (s)
* *Euphorbia caput-aureum* <small>Denis</small> (s)
* *Euphorbia caput-medusae* <small>L.</small> (s) 
* *Euphorbia caracasana* <small>(Klotzsch & Garcke) Boiss.</small> (s)
* *Euphorbia cardiophylla* <small>Boiss. & Heldr. ex Boiss.</small>
* *Euphorbia carinifolia* <small>N.E.Br.</small>
* *Euphorbia carinulata* <small>P.R.O.Bally & S.Carter</small> (s)
* *Euphorbia carissoides* <small>F.M.Bailey</small>
* *Euphorbia carniolica* <small>Jacq.</small>
* *Euphorbia carpartica* <small>Wol.</small>
* *Euphorbia cartaginiensis* <small>Porta 1892 (E. carthaginiensis?)</small>
* *Euphorbia carteriana* <small>P.R.O.Bally</small> (s)
* *Euphorbia carullae* <small>Sennen</small>
* *Euphorbia carunculata* <small>Waterf.</small>
* *Euphorbia carunculifera* <small>L.C.Leach</small> (s)
** *Euphorbia carunculifera subsp. carunculifera* (s)
** *Euphorbia carunculifera subsp. subfastigiata* <small>L.C.Leach</small> (s)
* *Euphorbia cassia* <small>Boiss.</small>
* *Euphorbia cassythoides* <small>Boiss.</small> (s)
* *Euphorbia castillonii* <small>Lavranos</small> (s)
* *Euphorbia catamarcensis* <small>(Croizat) Subils</small>
* *Euphorbia cataractarum* <small>S.Carter</small> (s)
* *Euphorbia catenata* <small>(S.Carter) Bruyns</small> (s) (= *Monadenium catenatum*)
* *Euphorbia caterviflora* <small>N.E.Br.</small> (s)
* *Euphorbia cattimandoo* <small>Elliott ex Wight</small> (s)
* *Euphorbia caucasica* <small>Dubovik ex Dubovik & Klokov</small>
* *Euphorbia caudiculosa* <small>Boiss.</small>
* *Euphorbia cayensis* <small>Millsp.</small> (s)
* *Euphorbia cedrorum* <small>Rauh & Hebding</small> (s)
* *Euphorbia celastroides* <small>Boiss.</small> (s)
* *Euphorbia celata* <small>R.A.Dyer</small> (s)
* *Euphorbia celerieri* <small>(Emb.) Vindt</small>
* *Euphorbia centunculoides* <small>Kunth</small> (s)
* *Euphorbia ceratocarpa* <small>Ten.</small>
* *Euphorbia cereiformis* <small>L.</small> (s) - Milk barrel
* *Euphorbia ceroderma* <small>I.M.Johnst.</small> (s)
* *Euphorbia cervicornu* <small>Baillon</small>
* *Euphorbia chaborasia* <small>Gomb.</small>
* *Euphorbia chaculana* <small>Donn.Sm.</small> (s)
* *Euphorbia chaetocalyx* <small>Boiss.</small>
* *Euphorbia chamaecaula* <small>Weath.</small>
* *Euphorbia chamaeclada* <small>Ule</small>
* *Euphorbia chamaepeplus* <small>Boiss. & Gaill. ex Boiss.</small>
** *Euphorbia chamaepeplus var. chamaepeplus*
** *Euphorbia chamaepeplus var. angustifolia* <small>A.Danin</small>
* *Euphorbia chamaerrhodos* <small>Boiss.</small>
* *Euphorbia chamaesula* <small>Boiss.</small>
* *Euphorbia chamaesyce* <small>L.</small>
** *Euphorbia chamaesyce subsp. chamaesyce*
** *Euphorbia chamaesyce subsp. massiliensis* <small>(DC.) Thell.</small>
* *Euphorbia chamaesycoides* <small>B.Nord.</small>
* *Euphorbia chamissonis* <small>(Klotzsch & Garcke ex Klotzsch) Boiss.</small>
* *Euphorbia chankoana* <small>Vorosch.</small>
* *Euphorbia chapmanii* <small>Oudejans</small>
* *Euphorbia characias* <small>L.</small> (s)
** *Euphorbia characias subsp. characias* (s)
** *Euphorbia characias subsp. wulfenii* <small>(Hoppe ex W.D.J.Koch) Radcl.-Sm.</small> (s)
* *Euphorbia charleswilsoniana* <small>V.Vlk</small> (s)
* *Euphorbia cheiradenia* <small>Boiss. & Hohen. ex Boiss.</small>
* *Euphorbia cheirolepioides* <small>Rech.f.</small>
* *Euphorbia cheirolepis* <small>Fisch. & C.A.Mey. ex Ledeb.</small>
* *Euphorbia chenopodiifolia* <small>Boiss.</small>
* *Euphorbia chersina* <small>N.E.Br.</small> (s)
* *Euphorbia chersonesa* <small>Huft</small>
* *Euphorbia chevalieri* <small>(N.E.Br.) Bruyns</small> (s) (= *Monadenium chevalieri*)
* *Euphorbia chiapensis* <small>Brandegee</small>
* *Euphorbia chimaera* <small>Lipsky</small>
* *Euphorbia chiogenes* <small>(Small) Oudejans</small>
* *Euphorbia chiogenoides* <small>Rusby</small>
* *Euphorbia chiribensis* <small>V.W.Steinm. & Felger</small>
* *Euphorbia chrysochaeta* <small>W.Fitzg.</small>
* *Euphorbia chrysocoma* <small>H.Lév. & Vaniot ex H.Lév.</small>
* *Euphorbia cibdela* <small>N.E.Br.</small> (s)
* *Euphorbia cinerascens* <small>Engelm.</small>
* *Euphorbia cinera* <small>W.Fitzg.</small>
* *Euphorbia citrina* <small>S.Carter</small>
* *Euphorbia clandestina* <small>Jacq.</small> (s)
* *Euphorbia clarae* <small>(Malaisse & Lecron) Bruyns</small> (s) (= *Monadenium clarae*)
* *Euphorbia clarkeana* <small>Hook.f.</small>
* *Euphorbia classenii* <small>P.R.O.Bally & S.Carter</small> (s)
* *Euphorbia clava* <small>Jacq.</small> (s)
* *Euphorbia clavarioides* <small>Boiss.</small> (s)
** *Euphorbia clavarioides var. clavarioides* (s)
** *Euphorbia clavarioides var. truncata* <small>(N.E.Br.) A.C.White, R.A.Dyer & B.Sloane</small> (s)
* *Euphorbia clavidigitata* <small>Gage</small>
* *Euphorbia clavigera* <small>N.E.Br.</small> (s)
* *Euphorbia claytonioides* <small>Pax</small>
* *Euphorbia clementei* <small>Boiss.</small>
** *Euphorbia clementei subsp. clementei*
** *Euphorbia clementei subsp. faurei* <small>(Maire) J.Vicens, Molero & C.Blanché</small>
** *Euphorbia clementei subsp. villosa* <small>(Faure & Maire) J.Vicens, Molero & C.Blanché</small>
* *Euphorbia clementii* <small>Domin</small>
* *Euphorbia clivicola* <small>R.A.Dyer</small> (s)
* *Euphorbia clusiifolia* <small>Hook. & Arn.</small>
* *Euphorbia coalcomanensis* <small>(Croizat) V.W.Steinm.</small> (s) (= *Pedilanthus coalcomanensis*)
* *Euphorbia coccinea* <small>Roth</small>
* *Euphorbia coerulescens* <small>Haw.</small> (s)
* *Euphorbia cofradiana* <small>Brandegee</small>
* *Euphorbia coghlanii* <small>F.M.Bailey</small>
* *Euphorbia cognata* <small>(Klotzsch & Garcke) Boiss.</small>
* *Euphorbia colimae* <small>Rose</small>
* *Euphorbia colchica* <small>(Litv.) D.V.Geltman</small>
* *Euphorbia colletioides* <small>Benth.</small> (s)
* *Euphorbia colliculina* <small>A.C.White, R.A.Dyer & B.Sloane</small> (s)
* *Euphorbia collina* <small>Phil.</small>
* *Euphorbia colligata* <small>V.W.Steinm.</small> (s) (= *Pedilanthus connatus*)
* *Euphorbia colorata* <small>Engelm.</small> (s)
* *Euphorbia colubrina* <small>P.R.O.Bally & S.Carter</small> (s)
* *Euphorbia columnaris* <small>P.R.O.Bally</small> (s)
* *Euphorbia comans* <small>W.Fitzg.</small>
* *Euphorbia commersonii* <small>Baillon emend. Denis</small>
* *Euphorbia commutata* <small>Engelm.</small> 
* *Euphorbia comosa* <small>Vell.</small> (s)
* *Euphorbia complanata* <small>Warb.</small> (s)
* *Euphorbia complexa* <small>R.A.Dyer</small> (s)
* *Euphorbia compressa* <small>Boiss.</small>
* *Euphorbia concanensis* <small>Janarth. & S.R.Yadav</small>
* *Euphorbia condylocarpa* <small>M.Bieb.</small> (s)
* *Euphorbia conferta* <small>(Small) Oudejans</small>
* *Euphorbia confinalis* <small>R.A.Dyer</small> (s)
** *Euphorbia confinalis subsp. confinalis* (s)
** *Euphorbia confinalis subsp. rhodesica* <small>L.C.Leach</small> (s)
* *Euphorbia confluens* <small>Nel</small> (s)
* *Euphorbia conformis* <small>N.E.Br.</small>
* *Euphorbia congenera* <small>Blume</small>
* *Euphorbia congestiflora* <small>L.C.Leach</small> (s)
* *Euphorbia coniosperma* <small>Boiss. & Buhse</small>
* *Euphorbia connata* <small>Boiss.</small>
* *Euphorbia consanguina* <small>Schrenk ex Fisch. & C.A.Mey.</small>
* *Euphorbia consobrina* <small>N.E.Br.</small> (s)
* *Euphorbia consoquitlae* <small>Brandegee</small>
* *Euphorbia conspicua* <small>N.E.Br.</small> (s)
* *Euphorbia contorta* <small>L.C.Leach</small> (s)
* *Euphorbia contoversa* <small>N.E.Br.</small>
* *Euphorbia convolvuloides* <small>Hochst. ex Hook. & Benth.</small>
* *Euphorbia conzattii* <small>V.W.Steinm.</small> (s) (= *Pedilanthus pulchellus*)
* *Euphorbia cooperi* <small>N.E.Br. ex A.Berger</small> (s) 
** *Euphorbia cooperi var. calidicola* <small>L.C.Leach</small> (s)
** *Euphorbia cooperi var. cooperi* (s)
** *Euphorbia cooperi var. ussanguensis* <small>(N.E.Br.) L.C.Leach</small> (s)
* *Euphorbia copiapina* <small>Phil.</small> (s)
* *Euphorbia corallioides* <small>L.</small> 
* *Euphorbia cordatella* <small>Oudejans</small>
* *Euphorbia cordifolia* <small>Elliott</small>
* *Euphorbia cornastra* <small>(Dressler) Radcl.-Sm.</small>
* *Euphorbia corniculata* <small>R.A.Dyer</small> (s)
* *Euphorbia cornigera* <small>Boiss.</small>
* *Euphorbia corollata* <small>L.</small> 
* *Euphorbia correllii* <small>M.C.Johnst.</small>
* *Euphorbia correntina* <small>D.Parodi</small>
* *Euphorbia corsica* <small>Req.</small>
* *Euphorbia corymbosa* <small>N.E.Br.</small> (s)
* *Euphorbia cossoniana* <small>Boiss.</small>
* *Euphorbia cotinifolia* <small>L.</small> (s)
** *Euphorbia cotinifolia subsp. cotinifolia* (s)
** *Euphorbia cotinifolia subsp. cotinoides* <small>(Miq.) Christenh.</small> (s) 
* *Euphorbia coudercii* <small>Gagnep.</small>
* *Euphorbia cowellii* <small>(Millsp. ex N.L.Britton) Oudejans</small> (s)
* *Euphorbia cozumelensis* <small>Millsp.</small>
* *Euphorbia craspedia* <small>Boiss.</small>
* *Euphorbia crassinodis* <small>Urb.</small>
* *Euphorbia crassipes* <small>Marloth</small> (s)
* *Euphorbia crebrifolia* <small>S.Carter</small>
* *Euphorbia cremersii* <small>Rauh & Razaf.</small> (s)
** *Euphorbia cremersii var. cremersii* (s)
*** *Euphorbia cremersii var. cremersii fa. viridiflora* <small>Rauh</small> (s)
** *Euphorbia cremersii var. rakotozafyi* <small>(Cremers) Rauh</small> (s)
* *Euphorbia crenata* <small>(N.E.Br.) Bruyns</small> (s) (= *Monadenium crenatum*)
* *Euphorbia crenulata* <small>Engelm.</small> - Chinese caps
* *Euphorbia crepitata* <small>L.C.Wheeler</small>
* *Euphorbia crepuscula* <small>(L.C.Wheeler) V.W.Steinm. & Felger</small>
* *Euphorbia cressoides* <small>M.C.Johnst.</small>
* *Euphorbia cretophila* <small>Klokov</small>
* *Euphorbia crispa* <small>(Haw.) Sweet</small> (s)
* *Euphorbia cristata* <small>Heyne ex A.W.Roth</small>
* *Euphorbia croizatii* <small>Leandri</small> (s)
* *Euphorbia crossadenia* <small>Pax & K.Hoffmann ex Pax</small>
* *Euphorbia crotonoides* <small>Boiss.</small>
** *Euphorbia crotonoides subsp. crotonoides*
** *Euphorbia crotonoides subsp. narokensis* <small>S.Carter</small>
* *Euphorbia cruentata* <small>Graham</small>
* *Euphorbia cryptocaulis* <small>M.G.Gilbert</small> (s)
* *Euphorbia cryptospinosa* <small>P.R.O.Bally</small> (s)
* *Euphorbia cuatrecasii* <small>Pau ex Cuatrec.</small>
* *Euphorbia cubensis* <small>Boiss.</small> (s)
* *Euphorbia cuchumatensis* <small>Standl. & Steyerm.</small>
* *Euphorbia culminicola* <small>Ant.Molina</small>
* *Euphorbia cumbrae* <small>Boiss.</small>
* *Euphorbia cumulata* <small>R.A.Dyer</small> (s)
* *Euphorbia cumulicola* <small>(Small) Oudejans</small>
* *Euphorbia cuneata* <small>Vahl</small> (s)
** *Euphorbia cuneata subsp. cretacea* <small>S.Carter</small> (s)
** *Euphorbia cuneata subsp. cuneata* (s)
** *Euphorbia cuneata subsp. lamproderma* <small>S.Carter</small> (s)
** *Euphorbia cuneata subsp. spinescens* <small>(Pax) S.Carter</small> (s)
*** *Euphorbia cuneata subsp. spinescens var. pumilans* <small>S.Carter</small> (s)
*** *Euphorbia cuneata subsp. spinescens var. spinescens* (s)
** *Euphorbia cuneata subsp. wajirensis* <small>S.Carter</small> (s)
* *Euphorbia cuneifolia* <small>Guss.</small>
* *Euphorbia cuneneana* <small>L.C.Leach</small> (s)
** *Euphorbia cuneneana subsp. cuneneana* (s)
** *Euphorbia cuneneana subsp. rhizomatosa* <small>L.C.Leach</small> (s)
* *Euphorbia cuphosperma* <small>(Engelm.) Boiss.</small>
* *Euphorbia cupricola* <small>(Malaisse & Lecron) Bruyns</small> (s) (= *Monadenium cupricola*)
* *Euphorbia cuprispina* <small>S.Carter</small> (s)
* *Euphorbia cupularis* <small>Boiss.</small> (s) (= *Synadenium cupulare*)
* *Euphorbia curocana* <small>L.C.Leach</small> (s)
* *Euphorbia curtisii* <small>Engelm. ex Chapm.</small> - Curtis' spurge
* *Euphorbia curvirama* <small>R.A.Dyer</small> (s)
* *Euphorbia cuspidata* <small>Bertol.</small>
* *Euphorbia cussonioides* <small>P.R.O.Bally</small> (s)
* *Euphorbia cyathophora* <small>Murray</small> (s) 
* *Euphorbia cylindrica* <small>A.C.White, R.A.Dyer & B.Sloane</small> (s)
* *Euphorbia cylindrifolia* <small>Marn.-Lap. & Rauh</small> (s)
** *Euphorbia cylindrifolia subsp. cylindrifolia* (s)
** *Euphorbia cylindrifolia subsp. tuberifera* <small>Rauh</small> (s)
* *Euphorbia cymbifera* <small>(Schltdl.) V.W.Steinm.</small> (s) (= *Pedilanthus cymbiferus*)
* *Euphorbia cymbiformis* <small>Rusby</small>
* *Euphorbia cyparissias* <small>L.</small> 
* *Euphorbia cyparissioides* <small>Pax</small>
* *Euphorbia cypria* <small>Boiss.</small>
* *Euphorbia cyri* <small>V.W.Steinm.</small> (= *Pedilanthus tomentellus*)
* *Euphorbia cyrtophylla* <small>(Prokh.) Prokh.</small>
* *Euphorbia czerepanovii* <small>D.V.Geltman</small>

== D ==

* *Euphorbia daghestanica* <small>D.V.Geltman</small>
* *Euphorbia dahurica* <small>Peschkova</small>
* *Euphorbia dalettiensis* <small>M.G.Gilbert</small> (s)
* *Euphorbia dallachyna* <small>Baillon</small>
* *Euphorbia damarana* <small>L.C.Leach</small> (s)
* *Euphorbia damasoi* <small>Oudejans</small>
* *Euphorbia darbandensis* <small>N.E.Br.</small> (s)
* *Euphorbia dasyacantha* <small>S.Carter</small> (s)
* *Euphorbia dauana* <small>S.Carter</small> (s)
* *Euphorbia davidii* <small>Subils</small> 
* *Euphorbia daviesii* <small>E.A.Bruce</small> (s)
* *Euphorbia davisii* <small>M.S.Khan</small>
* *Euphorbia davyi* <small>N.E.Br.</small> (s)
* *Euphorbia dawei* <small>N.E.Br.</small> (s)
* *Euphorbia debilispina* <small>L.C.Leach</small> (s)
* *Euphorbia descampsii* <small>(Pax) Bruyns</small> (s) (= *Monadenium descampsii*)
* *Euphorbia decaryi* <small>Guillaumin</small> (s)
** *Euphorbia decaryi var. ampanihyensis* <small>Cremers</small> (s)
** *Euphorbia decaryi var. decaryi* (s)
** *Euphorbia decaryi var. robinsonii* <small>Cremers</small> (s)
** *Euphorbia decaryi var. spirosticha* <small>Rauh & Buchloh</small> (s)
* *Euphorbia decepta* <small>N.E.Br.</small> (s)
* *Euphorbia decidua* <small>P.R.O.Bally & L.C.Leach</small> (s)
* *Euphorbia decipiens* <small>Boiss. & Buhse</small>
* *Euphorbia decliviticola* <small>L.C.Leach</small> (s)
* *Euphorbia decorsei* <small>Drake</small> (s)
* *Euphorbia dedzana* <small>L.C.Leach</small> (s)
* *Euphorbia deflexa* <small>Sibth. & J.E.Smith</small>
* *Euphorbia defoliata* <small>Urb.</small> (s)
* *Euphorbia degeneri* <small>Sherff</small>
* *Euphorbia deightonii* <small>Croizat</small> (s)
* *Euphorbia dekindtii* <small>Pax</small> (s)
* *Euphorbia delicatula* <small>Boiss.</small>
* *Euphorbia delicatissima* <small>S.Carter</small>
* *Euphorbia delphinensis* <small>Ursch & Leandri</small> (s)
* *Euphorbia deltobracteata* <small>(Prokh.) Prokh.</small>
* *Euphorbia deltoidea* <small>Engelm. ex Chapm.</small>
** *Euphorbia deltoidea subsp. adhaerens* <small>(Small) Oudejans</small>
** *Euphorbia deltoidea subsp. deltoidea*
*** *Euphorbia deltoidea subsp. deltoidea var. deltoidea*
*** *Euphorbia deltoidea subsp. deltoidea var. serpyllum* <small>(Small) Oudejans</small>
** *Euphorbia deltoidea subsp. pinetorum* <small>(Small) Oudejans</small>
* *Euphorbia demissa* <small>L.C.Leach</small> (s)
* *Euphorbia dendroides* <small>L.</small> (s)
* *Euphorbia denisiana* <small>Guillaumin</small> (s)
* *Euphorbia denisii* <small>Oudejans</small> (s)
* *Euphorbia densa* <small>Schrenk</small>
* *Euphorbia densiflora* <small>Klotzsch & Garcke ex Klotzsch</small>
* *Euphorbia densifolia* <small>K.Koch</small>
* *Euphorbia densispina* <small>S.Carter</small> (s)
* *Euphorbia densiuscula* <small>Popov</small>
* *Euphorbia densiusculiformis* <small>(Pazij) Botsch. ex Botsch. & Tscherneva</small>
* *Euphorbia dentata* <small>Michx.</small> 
** *Euphorbia dentata var. dentata*
** *Euphorbia dentata var. lasiocarpa* <small>Boiss.</small>
* *Euphorbia denticulata* <small>Lam.</small>
* *Euphorbia dentosa* <small>I.M.Johnst.</small>
* *Euphorbia depauperata* <small>Hochst. ex A.Rich.</small> (s)
** *Euphorbia depauperata var. depauperata* (s)
** *Euphorbia depauperata var. laevicarpa* <small>Friis & Vollesen</small> (s)
** *Euphorbia depauperata var. trachycarpa* <small>(Pax) S.Carter</small> (s)
** *Euphorbia depauperata var. tsetserrensis* <small>S.Carter</small> (s)
* *Euphorbia deppeana* <small>Boiss.</small>
* *Euphorbia derickii* <small>V.W.Steinm.</small>
* *Euphorbia desmondii* <small>Keay & Milne-Redh.</small> (s)
* *Euphorbia dhofarensis* <small>S.Carter</small> (s)
* *Euphorbia diazlunana* <small>(Lomelí & Sahagún) V.W.Steinm.</small> (s) (= *Pedilanthus diazlunanus*)
* *Euphorbia dichroa* <small>S.Carter</small> (s)
* *Euphorbia didiereoides* <small>Denis & Leandri</small> (s)
* *Euphorbia digestiva* <small>Rojas Acosta</small>
* *Euphorbia digitata* <small>S.Watson</small>
* *Euphorbia dilunguensis* <small>(Malaisse & Lecron) Bruyns</small> (s) (= *Monadenium dilunguense*)
* *Euphorbia dilobadena* <small>S.Carter</small> (s)
* *Euphorbia diminuta* <small>S.Carter</small>
* *Euphorbia dimorphocaulon* <small>P.H.Davis ex Rech.f.</small> (s)
* *Euphorbia dinteri* <small>A.Berger</small>
* *Euphorbia dioeca* <small>Kunth</small>
* *Euphorbia discoidea* <small>(P.R.O.Bally) Bruyns</small> (s) (= *Monadenium discoideum*)
* *Euphorbia discoreoides* <small>Boiss.</small>
** *Euphorbia discoreoides subsp. discoreoides*
** *Euphorbia discoreoides subsp. attenuata* <small>V.W.Steinm.</small>
* *Euphorbia disclusa* <small>N.E.Br.</small>
* *Euphorbia discoidalis* <small>Chapm., 1860</small>
* *Euphorbia discolor* <small>Ledeb.</small>
* *Euphorbia discrepans* <small>S.Carter</small> (s)
* *Euphorbia dispersa* <small>L.C.Leach</small> (s)
* *Euphorbia dissitispina* <small>L.C.Leach</small> (s)
* *Euphorbia distans* <small>W.Fitzg.</small>
* *Euphorbia disticha* <small>Engelm. ex Boiss.</small>
* *Euphorbia distinctissima* <small>L.C.Leach</small> (s)
* *Euphorbia diuretica* <small>Larrañaga</small>
* *Euphorbia djimilensis* <small>Boiss.</small>
* *Euphorbia dolichoceras* <small>S.Carter</small> (s)
* *Euphorbia doloensis* <small>M.G.Gilbert</small> (s)
* *Euphorbia donii* <small>Oudejans</small>
* *Euphorbia dorsiventralis* <small>Urb.</small>
* *Euphorbia dracunculoides* <small>;Lam.</small>
** *Euphorbia dracunculoides subsp. dracunculoides*
** *Euphorbia dracunculoides subsp. inconspicua* <small>(J.Ball) Maire</small>
* *Euphorbia dregeana* <small>E.Mey. ex Boiss.</small> (s)
* *Euphorbia dressleri* <small>V.W.Steinm.</small> (s) (= *Pedilanthus gracilis*)
* *Euphorbia drummondii* <small>Boiss.</small>
* *Euphorbia drupifera* <small>Thonn.</small> (s) (= *Elaeophorbia drupifera*)
* *Euphorbia dubovikii* <small>Oudejans</small>
* *Euphorbia duckei* <small>Oudejans</small>
* *Euphorbia dugandiana* <small>Croizat</small>
* *Euphorbia dulcis* <small>L.</small> - Sweet spurge
* *Euphorbia dumalis* <small>S.Carter</small>
* *Euphorbia dumenticola* <small>P.R.O.Bally & S.Carter</small> (s)
* *Euphorbia dunensis* <small>S.Carter</small> (s)
* *Euphorbia durandoi* <small>Chabert</small>
* *Euphorbia duranii* <small>Ursch & Leandri</small> (s)
** *Euphorbia duranii var. ankaratrae* <small>Ursch & Leandri</small> (s)
** *Euphorbia duranii var. duranii* (s)
* *Euphorbia duriuscula* <small>Pax & K.Hoffmann ex Herzog</small>
* *Euphorbia duseimata* <small>R.A.Dyer</small> (s)
* *Euphorbia dussii* <small>Krug & Urb. ex A.Duss</small>
* *Euphorbia duvalii* <small>H.Lecoq & Lamotte</small>
* *Euphorbia dwyeri* <small>D.G.Burch</small>

== E ==

* *Euphorbia eanophylla* <small>Croizat</small>
* *Euphorbia ebracteolata* <small>Hayata</small>
** *Euphorbia ebracteolata var. ebracteolata*
** *Euphorbia ebracteolata var. anhweiensis* <small>(Hurus.) Oudejans</small>
* *Euphorbia echinulata* <small>(Stapf) Bruyns</small> (s) (= *Monadenium echinulatum*)
* *Euphorbia echinus* <small>Hook. & Cosson</small> (s)
* *Euphorbia ecklonii* <small>(Klotzsch & Garcke) Baillon</small> (s)
* *Euphorbia ecorniculata* <small>Kitam.</small>
* *Euphorbia edgeworthii* <small>Boiss.</small>
* *Euphorbia edmondii* <small>Hochr.</small>
* *Euphorbia eduardoi* <small>L.C.Leach</small> (s)
* *Euphorbia eggersii* <small>Urb.</small>
* *Euphorbia eglandulosa* <small>V.W.Steinm.</small>
* *Euphorbia eichleri* <small>Müll.Arg.</small>
* *Euphorbia eilensis* <small>S.Carter</small> (s)
* *Euphorbia einensis* <small>G.Will.</small> (s)
** *Euphorbia einensis var. anemoarenicola* <small>G.Will.</small> (s)
** *Euphorbia einensis var. einensis* (s)
* *Euphorbia elastica* <small>Jum.</small>
* *Euphorbia eleanoriae* <small>(M.E.Lawr. & W.L.Wagner) Govaerts</small>
* *Euphorbia elegans* <small>Spreng.</small>
* *Euphorbia elegantissima* <small>P.R.O.Bally & S.Carter</small> (s)
* *Euphorbia ellenbeckii* <small>Pax</small> (s)
* *Euphorbia elliotii* <small>Leandri</small> (s)
* *Euphorbia ellipsifolia* <small>Gilli</small>
* *Euphorbia elodes* <small>Boiss.</small>
* *Euphorbia elquiensis* <small>Phil.</small>
* *Euphorbia elwendica* <small>Stapf</small>
* *Euphorbia elymaitica* <small>Bornm.</small>
* *Euphorbia emetica* <small>Padilla</small>
* *Euphorbia emirnensis* <small>Baker</small>
* *Euphorbia engelmannii* <small>Boiss.</small>
* *Euphorbia engleri* <small>Pax</small>
* *Euphorbia engleriana* <small>Dinter</small> (s)
* *Euphorbia enopla* <small>Boiss.</small> (s)
** *Euphorbia enopla var. enopla* (s)
** *Euphorbia enopla var. viridis* <small>A.C.White, R.A.Dyer & B.Sloane</small> (s)
* *Euphorbia enormis* <small>N.E.Br.</small> (s)
* *Euphorbia ensifolia* <small>Baker</small>
* *Euphorbia enterophora* <small>Drake</small> (s)
** *Euphorbia enterophora subsp. crassa* <small>Cremers</small> (s)
** *Euphorbia enterophora subsp. enterophora* (s)
* *Euphorbia ephedroides* <small>E.Mey. ex Boiss.</small> (s)
** *Euphorbia ephedroides var. debilis* <small>L.C.Leach</small> (s)
** *Euphorbia ephedroides var. ephedroides* (s)
** *Euphorbia ephedroides var. imminuta* <small>L.C.Leach & G.Will.</small> (s)
* *Euphorbia ephedromorpha* <small>Bartlett</small> (s)
* *Euphorbia epicyparissias* <small>(Klotzsch & Garcke) Boiss.</small>
* *Euphorbia epilobiifolia* <small>W.T.Wang</small>
* *Euphorbia epiphylloides* <small>Kurz</small> (s)
* *Euphorbia epithymoides* <small>L.</small> (jereo koa *Euphorbia polychroma*)
* *Euphorbia equisetiformis* <small>A.Stewart</small> (s)
* *Euphorbia eranthes* <small>R.A.Dyer & Milne-Redh.</small> (s)
* *Euphorbia eriantha* <small>Benth.</small> 
* *Euphorbia ericoides* <small>Lam.</small>
* *Euphorbia erigavensis* <small>S.Carter</small> (s)
* *Euphorbia erinacea* <small>Boiss. & Kotschy ex Boiss.</small>
* *Euphorbia eriophora* <small>Boiss.</small>
* *Euphorbia erlangeri* <small>Pax</small> (s)
* *Euphorbia ernestii* <small>N.E.Br.</small> (s)
* *Euphorbia erubescens* <small>Boiss.</small>
* *Euphorbia erythradenia* <small>Boiss.</small>
* *Euphorbia erythrina* <small>Link</small>
* *Euphorbia erythrocephala* <small>P.R.O.Bally & Milne-Redh.</small> (s)
* *Euphorbia erythroclada* <small>Boiss.</small>
* *Euphorbia erythrocucullata* <small>Mangelsdorff</small>
* *Euphorbia erythrodon* <small>Boiss. & Heldr. ex Boiss.</small>
* *Euphorbia erythroxyloides* <small>Baker</small>
* *Euphorbia esculenta* <small>Marloth</small> (s)
* *Euphorbia espinosa* <small>Pax</small> (s)
* *Euphorbia estevesii* <small>N.Zimm. & P.J.Braun</small> (s)
* *Euphorbia esula* <small>L.</small> 
* *Euphorbia esuliformis* <small>S.Schauer ex Nees & S.Schauer</small>
* *Euphorbia etuberculata* <small>P.R.O.Bally & S.Carter</small> (s)
* *Euphorbia eugeniae* <small>Prokh.</small>
* *Euphorbia euonymclada* <small>Croizat</small>
* *Euphorbia eustacei [es]* <small>N.E.Br.</small> (s)
* *Euphorbia evansii* <small>Pax</small> (s)
* *Euphorbia excelsa* <small>A.C.White, R.A.Dyer & B.Sloane</small> (s)
* *Euphorbia excisa* <small>Urb. & Ekman</small>
* *Euphorbia exigua* <small>L.</small> - Dwarf spurge
* *Euphorbia exilis* <small>L.C.Leach ex L.C.Leach & G.Will.</small> (s)
* *Euphorbia exilispina* <small>S.Carter</small> (s)
* *Euphorbia exserta* <small>(Small) Coker ex Clewell</small> 
* *Euphorbia exstipulata* <small>Engelm.</small>
* *Euphorbia exumensis* <small>(Millsp.) Correll</small>
* *Euphorbia eyassiana* <small>P.R.O.Bally & S.Carter</small> (s)
* *Euphorbia eylesii* <small>Rendle</small>

== F ==

* *Euphorbia falcata* <small>L.</small> 
* *Euphorbia famatamboay* <small>F.Friedmann & Cremers</small> (s)
** *Euphorbia famatamboay subsp. famatamboay* (s)
** *Euphorbia famatamboay subsp. itampolensis* <small>F.Friedmann & Cremers</small> (s)
* *Euphorbia fanshawei* <small>L.C.Leach</small> (s)
* *Euphorbia fascicaulis* <small>S.Carter</small> (s)
* *Euphorbia fasciculata* <small>Thunb.</small> (s)
* *Euphorbia faucicola* <small>L.C.Leach</small> (s)
* *Euphorbia fauriei* <small>H.Lév. & Vaniot</small> 
* *Euphorbia feddemae* <small>McVaugh</small>
* *Euphorbia fendleri* <small>Torr. & A.Gray</small>
* *Euphorbia ferganensis* <small>B.Fedtsch. ex O.Fedtsch. & B.Fedtsch.</small> (s)
* *Euphorbia ferox* <small>Marloth</small> (s)
* *Euphorbia fianarantsoae* <small>Ursch & Leandri</small> (s)
* *Euphorbia fidjiana* <small>Boiss.</small>
* *Euphorbia fiherenensis* <small>Poiss.</small> (s)
* *Euphorbia filicaulis* <small>Urb.</small>
* *Euphorbia filiflora* <small>Marloth</small> (s)
** *Euphorbia filiflora var. filiflora* (s)
** *Euphorbia filiflora var. nana* <small>G.Will.</small> (s)
* *Euphorbia filiformis* <small>(P.R.O.Bally) Bruyns</small> (s) (= *Monadenium chevalieri* var. *filiforme, Monadenium filiforme*)
* *Euphorbia filipes* <small>Benth.</small>
* *Euphorbia fimbriata* <small>Scop.</small> (s)
* *Euphorbia finkii* <small>(Boiss.) V.W.Steinm.</small> (= *Pedilanthus finkii*)
* *Euphorbia fischeri* <small>Pax</small>
* *Euphorbia fischeriana* <small>Steud.</small>
* *Euphorbia fissispina* <small>P.R.O.Bally & S.Carter</small> (s)
* *Euphorbia fistulosa* <small>M.S.Khan</small>
* *Euphorbia flanaganii* <small>N.E.Br.</small> (s)
* *Euphorbia flavicoma* <small>DC.</small>
* *Euphorbia flerowii* <small>Woronow ex Flerov</small>
* *Euphorbia floribunda* <small>Engelm. ex Boiss.</small>
* *Euphorbia florida* <small>Engelm.</small>
* *Euphorbia floridana* <small>Chapm.</small> 
* *Euphorbia fluminis* <small>S.Carter</small> (s)
* *Euphorbia foliiflua* <small>Ule</small>
* *Euphorbia foliolosa* <small>Boiss.</small>
* *Euphorbia foliosa* <small>(Klotzsch & Garcke ex Klotzsch) N.E.Br.</small> (s)
* *Euphorbia fontqueriana* <small>Greuter</small>
* *Euphorbia formosana* <small>Hayata</small>
* *Euphorbia forolensis* <small>L.E.Newton</small> (s)
* *Euphorbia forskalii* <small>J.Gay</small>
* *Euphorbia fortissima* <small>L.C.Leach</small> (s)
* *Euphorbia fortuita* <small>A.C.White, R.A.Dyer & B.Sloane</small> (s)
* *Euphorbia fosbergii* <small>(J.Florence) Govaerts</small>
* *Euphorbia fractiflexa* <small>S.Carter & J.R.I.Wood</small> (s)
* *Euphorbia fragifera* <small>G.Jan</small>
* *Euphorbia francescae* <small>L.C.Leach</small>
* *Euphorbia franchetii* <small>B.Fedtsch.</small>
* *Euphorbia franckiana* <small>A.Berger</small> (s)
* *Euphorbia francoana* <small>Boiss.</small>
* *Euphorbia francoisii* <small>Leandri</small> (s)
** *Euphorbia francoisii var. crassicaulis* <small>Rauh</small> (s)
** *Euphorbia francoisii var. francoisii* (s)
* *Euphorbia frankii* <small>Lavranos</small> (s)
* *Euphorbia franksiae* <small>N.E.Br.</small> (s)
** *Euphorbia franksiae var. franksiae* (s)
** *Euphorbia franksiae var. zuluensis* <small>A.C.White, R.A.Dyer & B.Sloane</small> (s)
* *Euphorbia fraseri* <small>Boiss.</small>
* *Euphorbia friedrichiae* <small>Dinter</small> (s)
* *Euphorbia friesii* <small>(N.E.Br.) Bruyns</small> (s) (= *Monadenium friesii*)
* *Euphorbia friesiorum* <small>(A.Hässl.) S.Carter</small> (s)
* *Euphorbia frutescens* <small>N.E.Br.</small> (s)
* *Euphorbia fruticosa* <small>Forssk.</small> (s)
* *Euphorbia fruticulosa* <small>Engelm. ex Boiss.</small>
* *Euphorbia fulgens* <small>Karw. ex Klotzsch</small> - Scarlet plume
* *Euphorbia fulva* <small>Stapf</small>
* *Euphorbia furcata* <small>N.E.Br.</small> (s)
* *Euphorbia furcillata* <small>Kunth</small>
* *Euphorbia fusca* <small>Marloth</small> (s)
* *Euphorbia fuscolanata* <small>Gilli</small>
* *Euphorbia fusiformis* <small>Buch.-Ham. ex D.Don</small> (s)
* *Euphorbia fwambensis* <small>(N.E.Br.) Bruyns</small> (s) (= *Monadenium fwambense*)

== G ==

* *Euphorbia gaditana* <small>Coss.</small>
* *Euphorbia gaillardotii* <small>Boiss. & Blanche ex Boiss.</small>
* *Euphorbia galapagaia* <small>B.L.Rob. & Greenm.</small>
* *Euphorbia galgalana* <small>S.Carter</small> (s)
* *Euphorbia galiciana* <small>McVaugh</small>
* *Euphorbia gamkensis* <small>Marx</small> (s)
* *Euphorbia garanbiensis* <small>Hayata</small>
* *Euphorbia garberi* <small>Engelm. ex Chapm.</small>
* *Euphorbia gariepina* <small>Boiss.</small> (s)
** *Euphorbia gariepina subsp. balsamea* <small>(Welw. ex Hiern) L.C.Leach</small> (s)
** *Euphorbia gariepina subsp. gariepina* (s)
* *Euphorbia garkeana* <small>Boiss.</small>
* *Euphorbia garuana* <small>N.E.Br.</small>
* *Euphorbia gasparrinii* <small>Boiss.</small>
* *Euphorbia gatbergensis* <small>N.E.Br.</small> (s)
* *Euphorbia gaubae* <small>(Soják) Radcl.-Sm.</small>
** *Euphorbia gaubae var. gaubae*
** *Euphorbia gaubae var. velutina* <small>(Bornm. & Gauba) Oudejans</small>
* *Euphorbia gaudichaudii* <small>Boiss.</small>
* *Euphorbia gaumeri* <small>Millsp.</small>
* *Euphorbia gayi* <small>Salis</small>
* *Euphorbia gebelica* <small>Brullo</small>
* *Euphorbia gedrosiaca* <small>Rech.f., Aellen & Esfand. ex Rech.f.</small>
* *Euphorbia geldorensis* <small>S.Carter</small> (s)
* *Euphorbia gemmea* <small>P.R.O.Bally & S.Carter</small> (s)
* *Euphorbia genistoides* <small>Bergius</small>
* *Euphorbia genoudiana* <small>Ursch & Leandri</small> (s)
* *Euphorbia gentilis* <small>N.E.Br.</small> (s)
** *Euphorbia gentilis subsp. gentilis* (s)
** *Euphorbia gentilis subsp. tanquana* <small>L.C.Leach</small> (s)
* *Euphorbia gentryi* <small>V.W.Steinm. & T.F.Daniel</small> (s)
* *Euphorbia georgei* <small>Oudejans</small>
* *Euphorbia germainii* <small>Phil.</small>
* *Euphorbia geroldii* <small>Rauh</small> (s)
* *Euphorbia geyeri* <small>Engelm. ex Engelm. & A.Gray</small>
* *Euphorbia giessii* <small>L.C.Leach</small> (s)
* *Euphorbia gillettii* <small>P.R.O.Bally & S.Carter</small> (s)
** *Euphorbia gillettii subsp. gillettii* (s)
** *Euphorbia gillettii subsp. tenuior* <small>S.Carter</small> (s)
* *Euphorbia giumboensis* <small>A.Hässl.</small> (s)
* *Euphorbia glaberrima* <small>K.Koch</small>
* *Euphorbia glabriflora* <small>Vis. ex Vis. & Pančić</small>
* *Euphorbia gladiata* <small>(P.R.O.Bally) Bruyns</small> (s) (= *Monadenium yattanum* var. *gladiatum, Monadenium gladiatum*)
* *Euphorbia glandularis* <small>L.C.Leach & G.Will.</small> (s)
* *Euphorbia glanduligera* <small>Pax</small>
* *Euphorbia glauca* <small>G.Forst.</small> (s)
* *Euphorbia glaucescens* <small>Willd.</small>
* *Euphorbia glaucopoda* <small>Diels</small>
* *Euphorbia globosa* <small>(Haw.) Sims</small> (s) 
* *Euphorbia globulicaulis* <small>S.Carter</small> (s)
* *Euphorbia glochidiata* <small>Pax</small> (s)
* *Euphorbia glomerulans* <small>(Prokh.) Prokh.</small>
* *Euphorbia glytosperma* <small>Engelm.</small>
* *Euphorbia godana* <small>Buddens., Lawant, & Lavranos</small> (s)
* *Euphorbia goetzei* <small>Pax</small> (s)
* *Euphorbia goliana* <small>Comm. ex Lam.</small>
* *Euphorbia golondrina* <small>L.C.Wheeler</small>
* *Euphorbia gorenflotii* <small>Mobayen</small>
* *Euphorbia gorgonis* <small>A.Berger</small> (s)
* *Euphorbia gossypina* <small>Pax</small> (s)
** *Euphorbia gossypina subsp. gossypina* (s)
*** *Euphorbia gossypina subsp. gossypina var. coccinea* <small>Pax</small> (s)
*** *Euphorbia gossypina subsp. gossypina var. gossypina* (s)
** *Euphorbia gossypina subsp. mangulensis* <small>S.Carter</small> (s)
* *Euphorbia gottlebei* <small>Rauh</small> (s)
* *Euphorbia goudotii* <small>Boiss.</small> (s)
* *Euphorbia goyazensis* <small>Boiss.</small> (s)
* *Euphorbia gracilicaulis* <small>L.C.Leach</small> (s)
* *Euphorbia gracilior* <small>Cronquist</small>
* *Euphorbia graciliramea* <small>Pax</small> (s)
* *Euphorbia gracillima* <small>S.Watson</small>
* *Euphorbia gradyi* <small>V.W.Steinm. & Ram.-Roa</small> (s)
* *Euphorbia graminea* <small>Jacq.</small>
* *Euphorbia graminifolia* <small>Vill.</small>
* *Euphorbia graminifolia subsp. graminifolia*
* *Euphorbia graminifolia subsp. tommasiniana* <small>(Bertoloni) Oudejans</small>
* *Euphorbia graminifolia subsp. zhiguliensis* <small>(Prokh.) Oudejans</small>
* *Euphorbia grammata* <small>(McVaugh) Oudejans</small>
* *Euphorbia grandialata* <small>R.A.Dyer</small> (s)
* *Euphorbia grandicornis* <small>Goebel ex N.E.Br.</small> (s)
** *Euphorbia grandicornis subsp. grandicornis* (s)
** *Euphorbia grandicornis subsp. sejuncta* <small>L.C.Leach</small> (s)
* *Euphorbia grandidens* <small>Haw.</small> (s)
* *Euphorbia grandidieri* <small>Baillon</small>
* *Euphorbia grandifolia* <small>Haw.</small> (s) (= *Elaeophorbia grandifolia*)
* *Euphorbia grandiloba* <small>Chiov.</small>
* *Euphorbia graniticola* <small>L.C.Leach</small> (s)
* *Euphorbia grantii* <small>Oliver</small> (s) 
* *Euphorbia granulata* <small>Forssk.</small>
* *Euphorbia greenwayi* <small>P.R.O.Bally & S.Carter</small> (s)
** *Euphorbia greenwayi subsp. breviaculeata* <small>S.Carter</small> (s)
** *Euphorbia greenwayi subsp. greenwayi* (s)
* *Euphorbia gregaria* <small>Marloth</small> (s)
* *Euphorbia gregersenii* <small>K.Maly ex Beck</small>
* *Euphorbia griffithii* <small>Hook.f.</small>
* *Euphorbia grisea* <small>Engelm. ex Boiss.</small>
* *Euphorbia griseola* <small>Pax</small> (s)
** *Euphorbia griseola subsp. griseola* (s)
** *Euphorbia griseola subsp. mashonica* <small>L.C.Leach</small> (s)
** *Euphorbia griseola subsp. zambiensis* <small>L.C.Leach</small> (s)
* *Euphorbia grisophylla* <small>M.S.Khan</small>
* *Euphorbia groenewaldii* <small>R.A.Dyer</small> (s)
* *Euphorbia grosseri* <small>Pax</small> (s)
* *Euphorbia grossheimii* <small>(Prokh.) Prokh.</small>
* *Euphorbia guadalajarana* <small>S.Watson</small>
* *Euphorbia guanarensis* <small>Pittier</small>
* *Euphorbia guatemalensis* <small>Standl. & Steyerm.</small> (s)
* *Euphorbia gueinzii* <small>Boiss.</small> (s)
** *Euphorbia gueinzii var. albovillosa* <small>(Pax) N.E.Br.</small> (s)
** *Euphorbia gueinzii var. gueinzii* (s)
* *Euphorbia guentheri* <small>(Pax) Bruyns</small> (s) (= *Monadenium guentheri*)
* *Euphorbia guerichiana* <small>Pax ex Engl.</small> (s)
* *Euphorbia guiengola* <small>W.R.Buck & Huft</small> (s)
* *Euphorbia guillauminiana* <small>Boiteau</small> (s)
* *Euphorbia guineensis* <small>Brot. ex N.E.Br.</small>
* *Euphorbia gulestanica* <small>Podlech</small>
* *Euphorbia gumaroi* <small>J.Meyrán</small> (s)
* *Euphorbia gummifera* <small>Boiss.</small> (s)
* *Euphorbia guntensis* <small>(Prokh.) Prokh.</small>
* *Euphorbia guyoniana* <small>Boiss. & Reut.</small>
* *Euphorbia gymnadenia* <small>Urb.</small>
* *Euphorbia gymnocalycioides* <small>M.G.Gilbert & S.Carter</small> (s)
* *Euphorbia gymnoclada* <small>Engelm.</small> (s)
* *Euphorbia gymnota* <small>Urb.</small>
* *Euphorbia gypsicola* <small>Rech.f. & Aellen ex Rech.f.</small>
* *Euphorbia gypsophila* <small>S.Carter</small>

== H ==

* *Euphorbia hadramautica* <small>Baker</small> (s)
* *Euphorbia haeleeleana* (s)
* *Euphorbia haematantha* <small>Boiss.</small>
* *Euphorbia hainanensis* <small>Croizat</small> (s)
* *Euphorbia hajhirensis* <small>Radcl.-Sm.</small> (s)
* *Euphorbia hakutosanensis* <small>Hurus.</small>
* *Euphorbia halemanui* <small>Sherff</small>
* *Euphorbia halipedicola* <small>L.C.Leach</small> (s)
* *Euphorbia hallii* <small>R.A.Dyer</small> (s)
* *Euphorbia hamaderoensis* <small>A.G.Mill</small>
* *Euphorbia hamata* <small>(Haw.) Sweet</small> (s)
* *Euphorbia hamiltonii* <small>Oudejans</small>
* *Euphorbia handeniensis* <small>S.Carter</small> (s)
* *Euphorbia handiensis* <small>Burchard</small> (s)
* *Euphorbia hararensis* <small>Pax</small>
* *Euphorbia harmandii* <small>Gagnep.</small>
* *Euphorbia hartwegiana* <small>Boiss.</small>
* *Euphorbia hassleriana* <small>Chodat</small>
* *Euphorbia hausknechtii* <small>Boiss.</small>
* *Euphorbia hebecarpa* <small>Boiss.</small>
* *Euphorbia hedigeriana* <small>(Malaisse & Lecron) Bruyns</small> (= *Monadenium hedigerianum*) (s)
* *Euphorbia hedyotoides* (s)
* *Euphorbia heishuiensis* <small>W.T.Wang</small>
* *Euphorbia helenae* <small>Urb.</small> (s)
** *Euphorbia helenae* subsp. *grandifolia* <small>Borhidi & O.Muñiz</small>
** *Euphorbia helenae* subsp. *helenae*
* *Euphorbia heleniana* <small>Thell. & Stapf</small>
* *Euphorbia helioscopia* 
* *Euphorbia helleri* <small>Millsp.</small> 
* *Euphorbia helwigii* <small>Urb. & Ekman</small>
* *Euphorbia henricksonii* <small>M.C.Johnst.</small>
* *Euphorbia henryi* <small>Hemsl.</small>
* *Euphorbia hepatica* <small>Urb. & Ekman</small>
* *Euphorbia heptagona* <small>L.</small> (s)
** *Euphorbia heptagona* var. *dentata* <small>(A.Berger) N.E.Br.</small>
** *Euphorbia heptagona* var. *heptagona*
** *Euphorbia heptagona* var. *ramosa* <small>A.C.White, R.A.Dyer & B.Sloane</small>
** *Euphorbia heptagona* var. *subsessilis* <small>A.C.White, R.A.Dyer & B.Sloane</small>
** *Euphorbia heptagona* var. *viridis* <small>A.C.White, R.A.Dyer & B.Sloane</small>
* *Euphorbia heptapotamica* <small>V.P.Goloskokov</small>
* *Euphorbia herman-schwartzii* (s)
* *Euphorbia heraldiana* <small>(Millsp.) Oudejans</small>
* *Euphorbia herbacea* <small>(Pax) Bruyns</small> (= *Monadenium herbaceum*) (s)
* *Euphorbia herbstii* <small>(W.L.Wagner) Oudejans</small>
* *Euphorbia herniariifolia* <small>Willd.</small>
* *Euphorbia herrei* <small>A.C.White, R.A.Dyer & B.Sloane</small> (s)
* *Euphorbia herteri* <small>Arechav.</small>
* *Euphorbia heteradena* <small>Jaub. & Spach</small>
* *Euphorbia heterochroma* <small>Pax</small> (s)
** *Euphorbia heterochroma* subsp. *heterochroma*
** *Euphorbia heterochroma* subsp. *tsavoensis* <small>S.Carter</small>
* *Euphorbia heterodoxa* <small>Müll.Arg.</small> (s)
* *Euphorbia heterophylla*
* *Euphorbia heteropoda* <small>Pax</small> (= *Monadenium heteropodum*) (s)
** *Euphorbia heteropoda* var. *formosa* <small>(P.R.O.Bally) Bruyns</small> (= *Monadenium heteropodum* var. *formosum*, *Monadenium schubei* var. *formosum*)
** *Euphorbia heteropoda* var. *heteropoda* (= *Monadenium heteropodum* var. *heteropodum*)
* *Euphorbia heterospina* <small>S.Carter</small> (s)
** *Euphorbia heterospina* subsp. *baringoensis* <small>S.Carter</small>
** *Euphorbia heterospina* subsp. *heterospina*
* *Euphorbia hexadenia*
* *Euphorbia hexagona* <small>Nutt. ex Spreng.</small> 
* *Euphorbia hexagonoides* <small>S.Watson</small>
* *Euphorbia heyligersiana* <small>P.I.Forst.</small> (s)
* *Euphorbia heyneana* <small>Spreng.</small>
* *Euphorbia hiernii* <small>(Croizat) Oudejans</small> (= *Elaeophorbia hiernii*) (s)
* *Euphorbia hieroglyphica* <small>Coss. & Durieu ex Boiss.</small>
* *Euphorbia hieronymi* <small>Subils</small>
* *Euphorbia hierosolymitana* <small>Boiss.</small> (s)
** *Euphorbia hierosolymitana* var. *hierosolymitana*
** *Euphorbia hierosolymitana* var. *ramanensis* <small>(B.Baum) Zohary</small>
* *Euphorbia hildebrandtii*
* *Euphorbia hillebrandii* <small>H.Lév.</small>
* *Euphorbia himalayensis* <small>(Klotzsch & Garcke) Boiss.</small>
* *Euphorbia hinkleyorum* <small>I.M.Johnst.</small> (s)
* *Euphorbia hintonii* <small>L.C.Wheeler</small> (s)
* *Euphorbia hippocrepica* <small>Hemsl.</small>
* *Euphorbia hirsuta* <small>L.</small>
** *Euphorbia hirsuta* var. *hirsuta*
** *Euphorbia hirsuta* var. *leucotricha* <small>(Boiss.) Oudejans</small>
* *Euphorbia hirta* <small>L.</small> (= *Chamaesyce hirta*)
** *Euphorbia hirta* var. *hirta*
* *Euphorbia hirtella* <small>Boiss.</small>
* *Euphorbia hispida* <small>Boiss.</small>
* *Euphorbia hockii* <small>De Wild.</small>
* *Euphorbia hoffmanniana* <small>(Klotzsch & Garcke) Boiss.</small> (s)
* *Euphorbia hondurana* <small>Standl. & L.O.Williams</small>
* *Euphorbia hofstaetteri* (s)
* *Euphorbia holmesiae* <small>Lavranos</small> (s)
* *Euphorbia holochlorina* <small>Rizzini</small> (s)
* *Euphorbia hooveri* <small>L.C.Wheeler</small>
* *Euphorbia hopetownensis* <small>Nel</small> (s)
* *Euphorbia hormorrhiza* <small>Radcl.-Sm.</small> (s)
* *Euphorbia horombensis* (s)
* *Euphorbia horrida* <small>Boiss.</small> (s)
** *Euphorbia horrida* var. *horrida*
** *Euphorbia horrida* var. *major* <small>A.C.White, R.A.Dyer & B.Sloane</small>
** *Euphorbia horrida* var. *noorsvedensis* <small>A.C.White, R.A.Dyer & B.Sloane</small>
** *Euphorbia horrida* var. *striata* <small>A.C.White, R.A.Dyer & B.Sloane</small>
* *Euphorbia horwoodii* <small>S.Carter & Lavranos</small> (s)
* *Euphorbia hottentotoa* <small>Marloth</small> (s)
* *Euphorbia hsinchuensis* <small>(S.C.Lin & Chaw) C.Y.Wu & J.S.Ma</small>
* *Euphorbia huanchahana* <small>(Klotzsch & Garcke ex Klotzsch) Boiss.</small> (s)
** *Euphorbia huanchahana* subsp. *huanchahana*
** *Euphorbia huanchahana* subsp. *penazuelensis* <small>Croizat</small>
* *Euphorbia hubertii* <small>Pax</small> (s)
* *Euphorbia humayensis* <small>Brandegee</small>
* *Euphorbia humbertii*
* *Euphorbia humifusa* <small>Willd.</small>
* *Euphorbia humilis* <small>C.A.Mey. ex Ledeb.</small>
* *Euphorbia humistrata* <small>Engelm. ex A.Gray</small>
* *Euphorbia hunzikeri* <small>Subils</small>
* *Euphorbia hurusawae* <small>Oudejans</small>
* *Euphorbia hurusawae* <small>Oudejans</small>
* *Euphorbia hurusawae var. hurusawae* <small>Oudejans</small>
* *Euphorbia hurusawae var. imaii* <small>(Hurus.) Oudejans</small>
* *Euphorbia hyberna* <small>L.</small> – Irish spurge
** *Euphorbia hyberna* subsp. *canuti* <small>(Parl.) Tutin</small>
** *Euphorbia hyberna* subsp. *gibelliana* <small>(Peola) M.Raffaelli</small>
** *Euphorbia hyberna* subsp. *hyberna*
** *Euphorbia hyberna* subsp. *insularis* <small>(Boiss.) J.I.Briquet</small>
* *Euphorbia hylonoma* <small>Hand.-Mazz.</small>
* *Euphorbia hypericifolia* <small>L.</small>
* *Euphorbia hypogaea* <small>Marloth</small> (s)
* *Euphorbia hyssopifolia* <small>L.</small> (= *Chamaesyce hyssopifolia*)
** *Euphorbia hyssopifolia* var. *blanchetii* <small>(Miq. ex Boiss.) Oudejans</small>
** *Euphorbia hyssopifolia* var. *hyssopifolia*
** *Euphorbia hyssopifolia* var. *paraguayensis* <small>(Chodat) Oudejans</small>
** *Euphorbia hyssopifolia* var. *pruinosa* <small>(Chodat) Oudejans</small>
** *Euphorbia hyssopifolia* var. *pubescenticocca* <small>Christenh.</small>
** *Euphorbia hyssopifolia* var. *pulchella* <small>(Kunth) Oudejans</small>
** *Euphorbia hyssopifolia* var. *uniflora* <small>(Chodat & Hassl.) Oudejans</small>

== I ==

* *Euphorbia iancannellii* <small>Bruyns</small> (= *Monadenium cannellii*) (s)
* *Euphorbia iberica* <small>Boiss.</small>
* *Euphorbia iharanae* <small>Rauh</small> (s)
* *Euphorbia imerina* <small>Cremers</small> (s)
* *Euphorbia imitata* <small>N.E.Br.</small> (s)
* *Euphorbia immersa* <small>P.R.O.Bally & S.Carter</small> (s)
* *Euphorbia imparispina* <small>S.Carter</small> (s)
* *Euphorbia impressa* <small>Chiov.</small>
* *Euphorbia inaequilatera* <small>Sond.</small>
** *Euphorbia inaequilatera* var. *dentata* <small>(N.E.Br.) M.G.Gilbert</small>
** *Euphorbia inaequilatera* var. *inaequilatera*
** *Euphorbia inaequilatera* var. *jemenica* <small>(Schweinf.) Oudejans</small>
** *Euphorbia inaequilatera* var. *spanothrix* <small>S.Carter</small>
* *Euphorbia inaequispina* <small>N.E.Br.</small> (s)
* *Euphorbia inaguaensis* <small>Oudejans</small>
* *Euphorbia inappendiculata* <small>Domin</small>
* *Euphorbia inarticulata* <small>Schweinf.</small>
* *Euphorbia incerta* <small>Brandegee</small> (= *Chamaesyce incerta*)
* *Euphorbia inciformis* <small>Sessé & Moc.</small>
* *Euphorbia inconstantia* <small>R.A.Dyer</small>
* *Euphorbia inculta* <small>P.R.O.Bally</small> (s)
* *Euphorbia indecora* <small>N.E.Br.</small> (s)
* *Euphorbia inderiensis* <small>Less. ex Kar. & Kir.</small>
* *Euphorbia indica* <small>Lam.</small>
* *Euphorbia indistincta* <small>P.I.Forst.</small> (s)
* *Euphorbia indivisa* <small>(Engelm.) Tidestr.</small>
* *Euphorbia indurescens* <small>L.C.Leach</small> (s)
* *Euphorbia inermis* <small>P.Miller</small> (s)
** *Euphorbia inermis* var. *huttoniae* <small>A.C.White, R.A.Dyer & B.Sloane</small> (s)
** *Euphorbia inermis* var. *inermis* (s)
* *Euphorbia infesta* <small>Pax</small>
* *Euphorbia inflexa* <small>Urb. & Ekman</small>
* *Euphorbia ingens* <small>E.Mey. ex Boiss.</small> 
* *Euphorbia ingenticapsa* <small>L.C.Leach</small> (s)
* *Euphorbia innocua* <small>L.C.Wheller</small> 
* *Euphorbia inornata* <small>N.E.Br.</small> (s)
* *Euphorbia insarmentosa* <small>G.P.Meyer</small>
* *Euphorbia insulana* <small>Vell.</small> (s)
** *Euphorbia insulana* var. *insulana* (s)
** *Euphorbia insulana* var. *pilcomayensis* <small>Croizat</small> (s)
** *Euphorbia insulana* var. *tovarenis* <small>(Boiss.) Oudejans</small> (s)
* *Euphorbia interaxillaris* <small>Fernald</small>
* *Euphorbia intisy* <small>Drake</small> (s)
* *Euphorbia intricata* <small>S.Carter</small> (s)
* *Euphorbia inundata* <small>Torr. ex Chapm.</small> 
** *Euphorbia inundata* var. *inundata*
** *Euphorbia inundata* var. *garrettii* <small>E.L.Bridges & Orzell</small>
* *Euphorbia inundaticola* <small>L.C.Leach</small> (s)
* *Euphorbia invaginata* <small>Croizat</small> (s)
* *Euphorbia invenusta* <small>(N.E.Br.) Bruyns</small> (= *Monadenium invenustum*) (s)
** *Euphorbia invenusta* var. *angusta* <small>(P.R.O.Bally) Bruyns</small> (= *Monadenium invenustum* var. *angustum*<sup>[</sup><sup>*fanamarinana ilaina*]</sup>)
** *Euphorbia invenusta* var. *invenusta* (= *Monadenium invenustum* var. *invenustum*<sup>[</sup><sup>*fanamarinana ilaina*]</sup>
* *Euphorbia ipecacuanhae* <small>L.</small> 
* *Euphorbia irgisensis* <small>Litv.</small>
* *Euphorbia isacantha* <small>Pax</small> (s)
* *Euphorbia isaloensis* <small>Drake</small> (s)
* *Euphorbia isatidifolia* <small>Lam.</small> (s)
* *Euphorbia isaurica* <small>M.S.Khan</small>
* *Euphorbia isophylla* <small>Bornm.</small>
* *Euphorbia itremensis* <small>Kimnach & Lavranos</small> (s)
* *Euphorbia ivanjohnstonii* <small>M.C.Johnst.</small>

== J ==

* *Euphorbia jacquemontii* <small>Boiss.</small>
* *Euphorbia jacquinii* <small>Boiss.</small>
* *Euphorbia jaliscensis* <small>B.L.Rob. & Greenm.</small> (s)
* *Euphorbia jamesonii* <small>Boiss.</small>
* *Euphorbia jansenvillensis* <small>Nel</small> (s)
* *Euphorbia jasiewiczii* <small>(Chrtek & Křísa) Radcl.-Sm.</small>
* *Euphorbia jatrophoides* <small>Pax</small> (s)
* *Euphorbia jejuna* <small>M.C.Johnst. & Warnock</small>
* *Euphorbia jenisseiensis* <small>K.S.Baikov</small>
* *Euphorbia jessonii* <small>Oudejans</small>
* *Euphorbia johannis* <small>S.Carter</small> (s)
* *Euphorbia johnstonii* <small>Mayfield</small> (s)
* *Euphorbia jolkinii* <small>Boiss.</small>
* *Euphorbia josei* <small>Oudejans</small> - Jose spurge
* *Euphorbia jovettii* <small>Huguet</small>
* *Euphorbia joyae* <small>P.R.O.Bally & S.Carter</small> (s)
* *Euphorbia jubata* <small>L.C.Leach</small>
* *Euphorbia juglans* <small>Compton</small> (s)
* *Euphorbia juttae* <small>Dinter</small> (s)
* *Euphorbia juvoklanti* <small>Pax</small> (s)

== K ==

* *Euphorbia kaessneri* <small>Pax</small> (s)
* *"Euphorbia kaessneri"* <small>(N.E.Br.) Bruyns 2006 (*non* Pax: preoccupied)</small> (s) (= *Monadenium kaessneri*)
* *Euphorbia kalaharica* <small>Marloth</small>
* *Euphorbia kalisana* <small>S.Carter</small> (s)
* *Euphorbia kamerunica* <small>Pax</small> (s)
* *Euphorbia kamponii* <small>Rauh & Petignat</small> (s)
* *Euphorbia kanalensis* <small>Boiss.</small> (s)
* *Euphorbia kanaorica* <small>Boiss.</small>
* *Euphorbia kanglingensis* <small>W.T.Wang</small>
* *Euphorbia kansuensis* <small>Prokh.</small>
* *Euphorbia kansui* <small>Liou ex S.B.Ho</small>
* *Euphorbia kaokoensis* <small>(A.C.White, R.A.Dyer & B.Sloane) L.C.Leach</small> (s)
* *Euphorbia karibensis* <small>S.Carter</small>
* *Euphorbia karoi* <small>Freyn</small>
* *Euphorbia karroensis* <small>(Boiss.) N.E.Br.</small> (s)
* *Euphorbia karwinskyi* <small>Boiss.</small>
* *Euphorbia katrajensis* <small>Gage</small>
* *Euphorbia keithii* <small>R.A.Dyer</small> (s)
* *Euphorbia kelleri* <small>Pax</small> (s)
** *Euphorbia kelleri var. kelleri* (s)
** *Euphorbia kelleri var. latifolia* <small>Pax</small> (s)
* *Euphorbia kemulariae* <small>Ter-Chatschat.</small>
* *Euphorbia kerrii* <small>Craib</small> (s)
* *Euphorbia kerstingii* <small>Pax</small>
* *Euphorbia khandallensis* <small>Blatt. & Hallb.</small> (s)
* *Euphorbia khasyana* <small>Boiss.</small>
* *Euphorbia kilwana* <small>N.E.Br.</small>
* *Euphorbia kimberleyana* <small>(G.Will.) Bruyns</small> (s) (= *Monadenium kimberleyanum*)
* *Euphorbia kimmerica* <small>Lipsky ex Grossh.</small>
* *Euphorbia kirimzjulica* <small>Stepanov</small>
* *Euphorbia kiritensis* <small>P.R.O.Bally & S.Carter</small> (s)
* *Euphorbia kirkii* <small>(N.E.Br.) Bruyns</small> (s) (= *Synadenium kirkii*)
* *Euphorbia kischenensis* <small>Vierh.</small> (s)
* *Euphorbia kitawagae* <small>(Hurus.) Kitag.</small>
* *Euphorbia klokovii* <small>Dubovik ex Dubovik et al.</small>
* *Euphorbia klotzschii* <small>Oudejans</small>
** *Euphorbia klotzschii var. argentina* <small>(Müll.Arg ex Griseb.) Oudejans</small>
** *Euphorbia klotzschii var. dentata* <small>(R.E.Fr.) Oudejans</small>
** *Euphorbia klotzschii var. klotzschii*
** *Euphorbia klotzschii var. schizosepala* <small>(Boiss.) Oudejans</small>
* *Euphorbia knobelii* <small>Letty</small> (s)
* *Euphorbia knuthii* <small>Pax</small> (s)
** *Euphorbia knuthii subsp. johnsonii* <small>(N.E.Br.) L.C.Leach</small> (s)
** *Euphorbia knuthii subsp. knuthii* (s)
* *Euphorbia koerneriana* <small>Allem & Irgang</small>
* *Euphorbia komaroviana* <small>Prokh.</small>
* *Euphorbia kondoi* <small>Rauh & Razaf.</small> (s)
* *Euphorbia kopetdaghii* <small>(Prokh.) Prokh.</small>
* *Euphorbia kotovii* <small>Klokov ex Dubovik & Klokov</small>
* *Euphorbia kotschyana* <small>Fenzl</small>
* *Euphorbia kouandensis* <small>Beille ex A.Chev.</small>
* *Euphorbia kozlovii* <small>Prokh.</small>
* *Euphorbia kraussiana* <small>Bernh. ex C.Krauss</small>
* *Euphorbia kudrjaschevii* <small>Prokh.</small>
* *Euphorbia kundelunguensis* <small>(Malaisse) Bruyns</small> (s) (= *Monadenium kundelunguense*)
* *Euphorbia kuriensis* <small>Vierh.</small> (s)
* *Euphorbia kurtzii* <small>Subils</small>
* *Euphorbia kuwaleana* <small>O.Deg. & Sherff</small>

== L ==

* *Euphorbia labatii* <small>Rauh & Bard.-Vauc.</small> (s)
* *Euphorbia lacei* <small>Craib</small> (s)
* *Euphorbia lacera* <small>Boiss.</small>
* *Euphorbia laciniata* <small>Panigrahi</small>
* *Euphorbia lactea* <small>Haw.</small> (s) 
* *Euphorbia lactiflua* <small>Phil.</small> (s)
* *Euphorbia laevigata* <small>Lam.</small>
* *Euphorbia lagascae* <small>Spreng.</small>
* *Euphorbia lagunensis* <small>Huft</small>
* *Euphorbia laikipiensis* <small>S.Carter</small>
* *Euphorbia lamarckii* <small>Sweet</small> (s)
* *Euphorbia lambii* <small>Svent.</small> (s)
* *Euphorbia lancasteriana* <small>Radcl.-Sm.</small>
* *Euphorbia lancifolia* <small>Schltdl.</small> (s) 
* *Euphorbia laredana* <small>Millsp.</small>
* *Euphorbia larica* <small>Boiss.</small> (s)
* *Euphorbia larranagae* <small>Oudejans</small>
* *Euphorbia lasiocarpa* <small>Klotzsch</small>
* *Euphorbia lata* <small>Engelm.</small>
* *Euphorbia latazi* <small>Kunth</small>
* *Euphorbia latericolor* <small>Brandegee</small> (s)
* *Euphorbia lateriflora* <small>Schumach. & Thonn.</small> (s)
* *Euphorbia lathyris* <small>L.</small> - Caper spurge, gopher spurge
* *Euphorbia latifolia* <small>C.A.Mey. ex Ledeb.</small>
* *Euphorbia laurifolia* <small>Lam.</small> (s)
* *Euphorbia lavicola* <small>S.Carter</small> (s)
* *Euphorbia lavrani* <small>L.C.Leach</small> (s)
* *Euphorbia laxa* <small>Drake</small>
* *Euphorbia leandriana* <small>Boiteau</small> (s)
* *Euphorbia lecheoides* <small>Millsp.</small>
** *Euphorbia lecheoides var. lecheoides*
** *Euphorbia lecheoides var. exumensis* <small>(Millsp.) Oudejans</small>
** *Euphorbia lecheoides var. wilsonii* <small>(Millsp.) Oudejans</small>
* *Euphorbia ledermanniana* <small>Pax & K.Hoffmann</small> (s)
* *Euphorbia ledienii* <small>A.Berger</small> (s)
** *Euphorbia ledienii var. dregei* <small>N.E.Br.</small> (s)
** *Euphorbia ledienii var. ledienii* (s)
* *Euphorbia leistneri* <small>R.H.Archer</small> (s)
* *Euphorbia lemaireana* <small>Boiss.</small> (s)
* *Euphorbia lenensis* <small>K.S.Baikov</small>
* *Euphorbia lenewtonii* <small>S.Carter</small> (s)
* *Euphorbia leonardii* <small>(D.G.Burch) Radcl.-Sm.</small>
* *Euphorbia leoncroizatii* <small>Oudejans</small>
* *Euphorbia leonensis* <small>N.E.Br.</small> (s)
* *Euphorbia leontopoda* <small>S.Carter</small> (s)
* *Euphorbia leptocaula* <small>Boiss.</small>
* *Euphorbia leptoclada* <small>Balf.f.</small> (s)
* *Euphorbia leshumensis* <small>N.E.Br.</small>
* *Euphorbia letestuana* <small>(Denis) Bruyns</small> (s) (= *Monadenium letestuanum*)
* *Euphorbia letestui* <small>J.Raynal</small> (s)
* *Euphorbia leucantha* <small>(Klotzsch & Garcke ex Klotzsch) Boiss.</small>
* *Euphorbia leucocephala* <small>Lotsy</small> (s) 
* *Euphorbia leucochlamys* <small>Chiov.</small> (s)
* *Euphorbia leucodendron* <small>Drake</small> (s)
** *Euphorbia leucodendron subsp. leucodendron* (s)
** *Euphorbia leucodendron subsp. oncoclada* <small>(Drake) Rauh & Koutnik</small> (s)
* *Euphorbia leuconeura* <small>Boiss.</small> (s)
* *Euphorbia leucophylla* <small>Benth.</small> (s)
** *Euphorbia leucophylla subsp. comcaacorum* <small>V.W.Steinm. & Felger</small> (s)
** *Euphorbia leucophylla subsp. leucophylla* (s)
* *Euphorbia levis* <small>Poir.</small>
* *Euphorbia lignosa* <small>Marloth</small> (s)
* *Euphorbia ligularia* <small>Roxb.</small>
* *Euphorbia ligustrina* <small>Boiss.</small>
* *Euphorbia limaensis* <small>Oudejans</small>
* *Euphorbia limpopoana* <small>S.Carter</small> (s)
* *Euphorbia lindenii* <small>(S.Carter) Bruyns</small> (s) (= *Monadenium lindenii*)
* *Euphorbia linearibracteata* <small>L.C.Leach</small> (s)
* *Euphorbia lineata* <small>S.Watson</small>
* *Euphorbia lingiana* <small>C.Shih ex Chun</small>
* *Euphorbia linguiformis* <small>McVaugh</small>
** *Euphorbia linguiformis var. actinadenia* <small>(McVaugh) Oudejans</small>
** *Euphorbia linguiformis var. linguiformis*
* *Euphorbia lingulata* <small>Heuff.</small>
* *Euphorbia linifolia* <small>L.</small>
* *Euphorbia lipskyi* <small>(Prokh.) Prokh.</small>
* *Euphorbia lissosperma* <small>S.Carter</small>
* *Euphorbia liukiuensis* <small>Hayata</small>
* *Euphorbia livida* <small>E.Mey. ex Boiss.</small>
* *Euphorbia lividiflora* <small>L.C.Leach</small> (s)
* *Euphorbia loadensis* <small>N.E.Br.</small>
* *Euphorbia lomelii* <small>V.W.Steinm.</small> (s) (= *Pedilanthus macrocarpus*)
* *Euphorbia longecorniculata* <small>Kitam.</small>
* *Euphorbia longecornuta* <small>S.Watson</small>
* *Euphorbia longicruris* <small>Scheele</small> 
* *Euphorbia longifolia* <small>Lam.</small> (s)
* *Euphorbia longinsulicola* <small>S.R.Hill</small> (s)
* *Euphorbia longispina* <small>Chiov.</small> (s)
* *Euphorbia longistyla* <small>Boiss.</small>
* *Euphorbia longituberculosa* <small>Boiss.</small> (s)
* *Euphorbia lophiosperma* <small>S.Carter</small>
* *Euphorbia lophogona* <small>Lam.</small> (s) – [[randramboay]]
** *Euphorbia lophogona var. lophogona* (s)
** *Euphorbia lophogona var. tenuicaulis*<small>Rauh</small> (s)
* *Euphorbia loricata*<small>Lam.</small> (s)
* *Euphorbia louwii* <small>L.C.Leach</small> (s)
* *Euphorbia luapulana* <small>L.C.Leach</small> (s)
* *Euphorbia lucida* <small>Waldst. & Kit.</small> 
* *Euphorbia luciismithii* <small>B.L.Rob. & Greenm.</small> (s)
* *Euphorbia lucorum* <small>Rupr.</small>
* *Euphorbia ludoviciana* <small>Raf.</small>
* *Euphorbia lugardiae* <small>(N.E.Br.) Bruyns</small> (s) (= *Monadenium lugardiae*)
* *Euphorbia lukoseana* <small>S.Carter</small> (s)
* *Euphorbia lumbricalis* <small>L.C.Leach</small> (s)
* *Euphorbia lundelliana* <small>Croizat ex Lundell</small> (s)
* *Euphorbia lunulata* <small>Bunge</small>
* *Euphorbia lupatensis* <small>N.E.Br.</small>
* *Euphorbia lupulina* <small>Boiss.</small> (s)
* *Euphorbia lurida* <small>Engelm.</small>
* *Euphorbia luteoviridis* <small>D.G.Long</small>
* *Euphorbia luticola* <small>Hand.-Mazz.</small>
* *Euphorbia lutosa* <small>S.Carter</small>
* *Euphorbia lutulenta* <small>(Croizat) Oudejans</small>
* *Euphorbia luzoniensis* <small>E.D.Merrill</small>
* *Euphorbia lycioides* <small>Boiss.</small> (s)
* *Euphorbia lydenburgensis* <small>Schweik. & Letty</small> (s)

== M ==

* *Euphorbia macella* <small>N.E.Br.</small> (s)
* *Euphorbia macgillivrayi* <small>Boiss.</small>
* *Euphorbia machrisiae* <small>Steyerm.</small>
* *Euphorbia macinensis* <small>Prodan</small>
* *Euphorbia macra* <small>Hiern</small>
* *Euphorbia macraulonia* <small>Phil.</small> (s)
* *Euphorbia macrocarpa* <small>Boiss.</small>
* *Euphorbia macroceras* <small>Fisch. & C.A.Mey.</small>
* *Euphorbia macroclada* <small>Boiss.</small>
* *Euphorbia macroglypha* <small>Lem.</small> (s)
* *Euphorbia macrophylla* <small>Pax</small> (s)
* *Euphorbia macropodoides* <small>B.L.Rob. & Greenm.</small> (s)
* *Euphorbia macropus* <small>(Klotzsch & Garcke) Boiss.</small> (s) 
* *Euphorbia macrorrhiza* <small>C.A.Mey. ex Ledeb.</small>
* *Euphorbia maculata* <small>L.</small> (s) - Spotted spurge
* *Euphorbia macvaughiana* <small>M.C.Johnst.</small>
* *Euphorbia macvaughii* <small>Carvajal & Lomeli ex Carvajal</small>
* *Euphorbia maddenii* <small>Boiss.</small>
* *Euphorbia mafingensis* <small>(Hargreaves) Bruyns</small> (s) (= *Monadenium mafingense*)
* *Euphorbia magdalenae* <small>Benth.</small> (s)
* *Euphorbia magnicapsula* <small>S.Carter</small> (s)
** *Euphorbia magnicapsula var. lacterosa* <small>S.Carter</small> (s)
** *Euphorbia magnicapsula var. magnicapsula* (s)
* *Euphorbia magnifica* <small>(E.A.Bruce) Bruyns</small> (s) (= *Monadenium magnificum*)
* *Euphorbia mahabobokensis* <small>Rauh</small> (s)
* *Euphorbia mahafalensis* <small>Denis</small> (s)
** *Euphorbia mahafalensis var. mahafalensis* (s)
** *Euphorbia mahafalensis var. xanthadenia* <small>(Denis) Leandri</small> (s)
* *Euphorbia mainty* <small>Denis ex Leandri</small> (s)
* *Euphorbia maieri* <small>H.Lév.</small>
* *Euphorbia makallensis* <small>S.Carter</small> (s)
* *Euphorbia maleolens* <small>Phillips</small> (s)
* *Euphorbia malevola* <small>L.C.Leach</small> (s)
* *Euphorbia malleata* <small>Boiss.</small>
* *Euphorbia malurensis* <small>Rech.f.</small>
* *Euphorbia malvana* <small>Maire</small>
* *Euphorbia mamfwensis* <small>(Malaisse & Lecron) Bruyns</small> (s) (= *Monadenium mamfwense*)
* *Euphorbia mammillaris* <small>L.</small> (s) 
* *Euphorbia mananarensis* <small>Leandri</small> (s)
* *Euphorbia mancinella* <small>Baillon</small>
* *Euphorbia mandrariensis* <small>Drake</small> (s)
* *Euphorbia mandravioky* <small>Leandri</small> (s)
* *Euphorbia mandshurica* <small>Maxim.</small>
* *Euphorbia mangleti* <small>Urb.</small>
* *Euphorbia mangelsdorffii* <small>Rauh</small> (s)
* *Euphorbia mangokyensis* <small>Denis</small> (s)
* *Euphorbia mangorensis* <small>Leandri</small>
* *Euphorbia marayensis* <small>Subils</small>
* *Euphorbia maresii* <small>Knoche</small>
* *Euphorbia margalidiana* <small>;Kuhbier & Lewej. ex Kuhbier</small> (s)
* *Euphorbia margaretae* <small>S.Carter</small> (s)
* *Euphorbia marginata* <small>Pursh</small> 
* *Euphorbia marianoi* <small>Oudejans</small>
* *Euphorbia marie-cladieae* <small>Rzepecky</small>
* *Euphorbia marilandica* <small>Greene</small>
* *Euphorbia maritae* <small>Rauh</small> (s)
* *Euphorbia marlothiana* <small>N.E.Br.</small> (s)
* *Euphorbia marrupana* <small>Bruyns</small> (s)
* *Euphorbia marsabitensis* <small>S.Carter</small> (s)
* *Euphorbia marshalliana* <small>Boiss.</small>
** *Euphorbia marshalliana subsp. marshalliana*
** *Euphorbia marshalliana subsp. armenae* <small>(Prokh.) Oudejans</small>
* *Euphorbia martinae* <small>Rauh</small> (s)
* *Euphorbia masirahensis* <small>S.A.Ghazanfar</small> (s)
* *Euphorbia matabelensis* <small>Pax</small> (s)
* *Euphorbia matritensis* <small>Boiss.</small>
* *Euphorbia mauritanica* <small>L.</small> (s)
** *Euphorbia mauritanica var. corallothamnus* <small>Dinter ex A.C.White, R.A.Dyer & B.Sloane</small> (s)
** *Euphorbia mauritanica var. foetens* <small>Dinter ex A.C.White, R.A.Dyer & B.Sloane</small> (s)
** *Euphorbia mauritanica var. lignosa* <small>A.C.White, R.A.Dyer & B.Sloane</small> (s)
** *Euphorbia mauritanica var. mauritanica* (s)
** *Euphorbia mauritanica var. minor* <small>A.C.White, R.A.Dyer & B.Sloane</small> (s)
** *Euphorbia mauritanica var. namaquensis* <small>N.E.Br.</small> (s)
* *Euphorbia maysillesii* <small>McVaugh</small>
* *Euphorbia mayurnathanii* <small>Croizat</small> (s)
* *Euphorbia mazarronensis* <small>Esteve Chueca</small>
* *Euphorbia mazatlamensis* <small>Oudejans</small>
* *Euphorbia mazicum* <small>Emb. & Maire</small>
* *Euphorbia medicaginea* <small>Boiss.</small>
* *Euphorbia meenae* <small>S.Carter</small> (s)
* *Euphorbia megalatlantica* <small>J.Ball</small>
* *Euphorbia megalocarpa* <small>Rech.f.</small>
* *Euphorbia melanadenia* <small>Torr.</small>
* *Euphorbia melanocarpa* <small>Boiss.</small>
* *Euphorbia melanohydrata* <small>Nel</small> (s)
* *Euphorbia melapetala* <small>Gasparr.</small>
* *Euphorbia melitensis* <small>Parl.</small> (s)
* *Euphorbia meloformis* <small>Aiton</small> (s)
** *Euphorbia meloformis subsp. meloformis* (s) 
** *Euphorbia meloformis subsp. valida* <small>(N.E.Br.) G.D.Rowley</small> (s)
* *Euphorbia memoralis* <small>R.A.Dyer</small> (s)
* *Euphorbia mendezii* <small>Boiss.</small>
* *Euphorbia menelikii* <small>Pax</small>
* *Euphorbia mercurialina* <small>Michx.</small> 
* *Euphorbia meridensis* <small>Pittier</small>
* *Euphorbia meridionalis* <small>P.R.O.Bally & S.Carter</small> (s)
* *Euphorbia mertonii* <small>Fosberg</small>
* *Euphorbia mesembryanthemifolia* <small>Jacq.</small> (s)
* *Euphorbia meuleniana* <small>Schwartz</small> (s)
* *Euphorbia meuselii* <small>Geltman</small>
* *Euphorbia mexiae* <small>Standl.</small>
* *Euphorbia meyeniana* <small>Klotzsch</small>
* *Euphorbia meyeriana* <small>Galushko</small>
* *Euphorbia micracantha* <small>Boiss.</small> (s)
* *Euphorbia micractina* <small>Boiss.</small>
* *Euphorbia micradenia* <small>Boiss.</small>
* *Euphorbia microcarpa* <small>(Prokh.) P.Klylov</small>
* *Euphorbia microcephala* <small>Boiss.</small>
* *Euphorbia microclada* <small>Urb.</small>
* *Euphorbia micromera* <small>Boiss. ex Engelm.</small>
* *Euphorbia microsciadia* <small>Boiss.</small>
* *Euphorbia microsperma* <small>(Murb.) Maly</small>
* *Euphorbia microsphaera* <small>Boiss.</small>
* *Euphorbia migiurtinorum* <small>Chiov.</small> (s)
* *Euphorbia milii* <small>Desmoul.</small> (s) 
** *Euphorbia milii var. bevilaniensis* <small>(Croizat) Ursch & Leandri</small> (s)
** *Euphorbia milii var. hislopii* <small>(N.E.Br.) Ursch & Leandri</small> (s)
** *Euphorbia milii var. imperatae* <small>(Leandri) Ursch & Leandri</small> (s)
** *Euphorbia milii var. longifolia* <small>Rauh</small> (s)
** *Euphorbia milii var. milii*
** *Euphorbia milii var. splendens* <small>(Bojer ex Hook.) Ursch & Leandri</small> (s)
** *Euphorbia milii var. tananarivae* <small>(Leandri) Ursch & Leandri</small> (s)
** *Euphorbia milii var. tenuispina* <small>Rauh & Razaf.</small> (s)
** *Euphorbia milii var. tulearensis* <small>Ursch & Leandri</small> (s)
** *Euphorbia milii var. vulcanii* <small>(Leandri) Ursch & Leandri</small> (s)
* *Euphorbia millotii* <small>Ursch & Leandri</small> (s)
* *Euphorbia minbuensis* <small>Gage</small>
* *Euphorbia minuta* <small>Loscos & Pard.</small>
** *Euphorbia minuta subsp. minuta*
** *Euphorbia minuta subsp. moleroi* <small>P.Montserrat Recoder & J.V.Ferrández Palacio</small>
* *Euphorbia minutifolia* <small>Boiss.</small>
* *Euphorbia minutula* <small>Boiss.</small>
* *Euphorbia minxianensis* <small>W.T.Wang</small>
* *Euphorbia mira* <small>L.C.Leach</small> (s)
* *Euphorbia misella* <small>S.Watson</small>
* *Euphorbia misera* <small>Benth.</small> (s) 
* *Euphorbia missurica* <small>Raf.</small>
* *Euphorbia mitchelliana* <small>Boiss.</small>
* *Euphorbia mitriformis* <small>P.R.O.Bally & S.Carter</small> (s)
* *Euphorbia mixta* <small>N.E.Br.</small> (s)
* *Euphorbia mlanjeana* <small>L.C.Leach</small> (s)
* *Euphorbia mocinoi* <small>Oudejans</small>
* *Euphorbia moehringioides* <small>Pax</small>
* *Euphorbia monacantha* <small>Pax</small> (s)
* *Euphorbia monadenoides* <small>M.G.Gilbert</small> (s)
* *Euphorbia monantha* <small>C.Wright ex Boiss.</small>
* *Euphorbia monchiquensis* <small>Franco & P. Silva</small>
* *Euphorbia monensis* <small>(Millsp.) Urb.</small>
* *Euphorbia mongolica* <small>(Prokh.) Prokh.</small>
* *Euphorbia monostyla* <small>(Prokh.) Prokh.</small>
* *Euphorbia monteiri* <small>Hook.f.</small> (s)
** *Euphorbia monteiri subsp. brandbergensis* <small>B.Nord.</small> (s)
** *Euphorbia monteiri subsp. monteiri* (s)
** *Euphorbia monteiri subsp. ramosa* <small>L.C.Leach</small> (s)
* *Euphorbia montenegrina* <small>(Baldacci) Maly</small>
* *Euphorbia moratii* <small>Rauh</small> (s)
** *Euphorbia moratii var. antsingiensis* <small>Cremers</small> (s)
** *Euphorbia moratii var. bemaharensis* <small>Cremers</small> (s)
** *Euphorbia moratii var. moratii* (s)
** *Euphorbia moratii var. multiflora* <small>Rauh</small> (s)
* *Euphorbia mosaica* <small>P.R.O.Bally & S.Carter</small> (s)
* *Euphorbia mossambicensis* <small>(Klotzsch & Garcke) Boiss.</small>
* *Euphorbia mossamedensis* <small>N.E.Br.</small>
* *Euphorbia mucronulata* <small>(Prokh.) Prokh.</small>
* *Euphorbia muelleri* <small>Boiss.</small>
* *Euphorbia muirii* <small>N.E.Br.</small> (s)
* *Euphorbia multiceps* <small>A.Berger</small> (s)
* *Euphorbia multiclava* <small>P.R.O.Bally & S.Carter</small> (s)
* *Euphorbia multifida* <small>N.E.Br.</small> (s)
* *Euphorbia multifolia* <small>A.C.White, R.A.Dyer & B.Sloane</small> (s)
* *Euphorbia multifoliosa* <small>M.E.Jones</small>
* *Euphorbia multiformis* <small>Hook. & Arn.</small>
* *Euphorbia multifurcata* <small>Rech.f., Aellen & Esfand. ex Rech.f.</small>
* *Euphorbia multinodis* <small>Urb.</small>
* *Euphorbia multiseta* <small>Benth.</small>
* *Euphorbia mundtii* <small>N.E.Br.</small> (s)
* *Euphorbia munizii* <small>Borhidi</small> (s)
* *Euphorbia muraltioides* <small>N.E.Br.</small>
* *Euphorbia muricata* <small>Thunb.</small>
* *Euphorbia musciola* <small>Fernald</small> (s)
* *Euphorbia musili* <small>Velen.</small>
* *Euphorbia mwinilungensis* <small>L.C.Leach</small> (s)
* *Euphorbia myrioclada* <small>S.Carter</small> (s)
* *Euphorbia myrsinites* <small>L.</small> (s) - Creeping spurge, donkey tail, myrtle spurge
** *Euphorbia myrsinites subsp. myrsinites* (s)
** *Euphorbia myrsinites subsp. pontica* <small>(Prokh.) R.Turner</small> (s)
** *Euphorbia myrsinites subsp. rechingeri* <small>(Greuter) Aldén</small> (s)
* *Euphorbia myrtillifolia* <small>L.</small>
* *Euphorbia myrtoides* <small>Boiss.</small>

== N ==

* *Euphorbia nagleri* <small>(Klotzsch & Garcke ex Klotzsch) Boiss.</small>
* *Euphorbia namibensis* <small>Marloth</small> (s)
* *Euphorbia namuliensis* <small>Bruyns</small> (s)
* *Euphorbia namuskluftensis* <small>L.C.Leach</small> (s)
* *Euphorbia natalensis* <small>Bernh. ex Krauss</small>
* *Euphorbia nayarensis* <small>V.W.Steinm.</small>
* *Euphorbia nealleyi* <small>Coult. & Fisher</small>
* *Euphorbia nebrownii* <small>Merr.</small>
* *Euphorbia negromontana* <small>N.E.Br.</small>
* *Euphorbia neilmulleri* <small>M.C.Johnst.</small>
* *Euphorbia nematocypha* <small>Hand.-Mazz.</small>
* *Euphorbia neoangolensis* <small>Bruyns</small> (s) (= *Monadenium angolense*)
* *Euphorbia neoarborescens* <small>Bruyns</small> (s) (= *Monadenium arborescens*)
* *Euphorbia neobosseri* <small>Rauh</small> (s)
** *Euphorbia neobosseri var. itampolensis* <small>Rauh</small> (s)
** *Euphorbia neobosseri var. neobosseri* (s)
* *Euphorbia neocaledonica* <small>Boiss.</small>
* *Euphorbia neocapitata* <small>Bruyns</small> (s) (= *Monadenium capitatum*)
* *Euphorbia neococcinea* <small>Bruyns</small> (s) (= *Monadenium coccineum*)
* *Euphorbia neocrispa* <small>Bruyns</small> (s) (= *Monadenium crispum*)
* *Euphorbia neocymosa* <small>Bruyns</small> (s) (= *Synadenium cymosum*)
* *Euphorbia neoerubescens* <small>Bruyns</small> (s) (= *Lortia erubescens, Monadenium erubescens*)
* *Euphorbia neogillettii* <small>Bruyns</small> (s) (= *Monadenium gillettii*)
* *Euphorbia neoglabrata* <small>Bruyns</small> (s) (= *Synadenium glabratum*)
* *Euphorbia neoglaucescens* <small>Bruyns</small> (s) (= *Synadenium glaucescens*)
* *Euphorbia neogoetzei* <small>Bruyns</small> (s) (= *Monadenium goetzei*)
* *Euphorbia neogossweileri* <small>Bruyns</small> (s) (= *Monadenium gossweileri, Endadenium gossweileri*)
* *Euphorbia neogracilis* <small>Bruyns</small> (s) (= *Monadenium gracile*)
* *Euphorbia neohalipedicola* <small>Bruyns</small> (s) (= *Synadenium halipedicola*)
* *Euphorbia neohumbertii* <small>Boiteau</small> (s)
* *Euphorbia neomontana* <small>Bruyns</small> (s) (= *Monadenium montanum*)
* *Euphorbia neoparviflora* <small>Bruyns</small> (s) (= *Monadenium parviflorum*)
* *Euphorbia neopedunculata* <small>Bruyns</small> (s) (= *Monadenium pedunculatum*)
* *Euphorbia neopolycnemoides* <small>Pax & K.Hoffmann</small>
* *Euphorbia neoreflexa* <small>Bruyns</small> (s) (= *Monadenium reflexum*)
* *Euphorbia neorubella* <small>Bruyns</small> (s) (= *Monadenium montanum* var. *rubellum,/ Monadenium rubellum*)
* *Euphorbia neorugosa* <small>Bruyns</small> (s) (= *Monadenium rugosum*)
* *Euphorbia neospinescens* <small>Bruyns</small> (s) (= *Stenadenium spinescens, Monadenium spinescens*)
* *Euphorbia neostapeliodes* <small>Bruyns</small> (s) (= *Monadenium stapelioides*)
** *Euphorbia neostapeliodes var. congesta* <small>(P.R.O.Bally) Bruyns</small> (s) (= *Monadenium stapelioides* var. *congestum*)
** *Euphorbia neostapeliodes var. neostapeliodes* (s) (= *Monadenium stapelioides* var. *stapelioides*)
* *Euphorbia neostolonifera* <small>Bruyns</small> (s) (= *Monadenium rhizophorum* var. *stoloniferum, Monadenium stoloniferum*)
* *Euphorbia neovirgata* <small>Bruyns</small> (s) (= *Monadenium virgatum*)
* *Euphorbia nephradenia* <small>Barneby</small> - Pana spurge
* *Euphorbia nereidum* <small>Jahandiez & Maire</small>
* *Euphorbia neriifolia* <small>L.</small> (s) - Indian spurgetree, hedge euphorbia
* *Euphorbia nesemannii* <small>R.A.Dyer</small> (s)
* *Euphorbia nevadensis* <small>Boiss. & Reut.</small>
* *Euphorbia nicaeensis* <small>All.</small>
** *Euphorbia nicaeensis subsp. glareosa* <small>(Pall. ex M.Bieb.) Radcl.-Sm.</small>
** *Euphorbia nicaeensis subsp. cadrilateri* <small>(Prod.) B.Kuzmanov</small>
** *Euphorbia nicaeensis subsp. goldei* <small>(Prod.) Greuter & Burdet</small>
** *Euphorbia nicaeensis subsp. lasiocarpa* <small>(Boiss.) Radcl.-Sm. & Govaerts</small>
** *Euphorbia nicaeensis subsp. latibracteata* <small>(Prod.) B.Kuzmanov</small>
** *Euphorbia nicaeensis subsp. maleevii* <small>(Tamamshyan) Oudejans</small>
** *Euphorbia nicaeensis subsp. nicaeensis*
** *Euphorbia nicaeensis subsp. prostrata* <small>(Fiori) Arrigoni</small>
** *Euphorbia nicaeensis subsp. stepposa* <small>(Zoz) Greuter & Burdet</small>
** *Euphorbia nicaeensis subsp. volgensis* <small>(Krysht.) Oudejans</small>
* *Euphorbia nicholasii* <small>Oudejans</small>
* *Euphorbia niciciana* <small>Borbás</small>
* *Euphorbia nigrispina* <small>N.E.Br.</small>
* *Euphorbia nigrispinoides* <small>M.G.Gilbert</small> (s)
* *Euphorbia niqueroana* <small>Urb.</small>
* *Euphorbia nivulia* <small>Buch.-Ham.</small> (s)
* *Euphorbia nocens* <small>(L.C.Wheeler) V.W.Steinm.</small>
* *Euphorbia nodosa* <small>Houtt.</small>
* *Euphorbia nogalensis* <small>(A.Hässl.) S.Carter</small> (s)
* *Euphorbia norfolkiana* <small>Boiss.</small> (s)
* *Euphorbia normannii* <small>Schmalh. ex Lipsky</small>
* *Euphorbia notoptera* <small>Boiss.</small>
* *Euphorbia novorossica* <small>Dubovik</small>
* *Euphorbia noxia* <small>Pax</small> (s)
* *Euphorbia nubica* <small>N.E.Br.</small> (s)
* *Euphorbia nubigena* <small>L.C.Leach</small> (s)
** *Euphorbia nubigena var. nubigena* (s)
** *Euphorbia nubigena var. rutilans* <small>L.C.Leach</small> (s)
* *Euphorbia nudicaulis* <small>Perr.</small> (s)
* *Euphorbia nummularia* <small>Hook.f.</small>
* *Euphorbia nutans* <small>Lag.</small>
* *Euphorbia nyassae* <small>Pax</small> (s)
* *Euphorbia nyikae* <small>Pax</small> (s)
** *Euphorbia nyikae var. neovolkensii* <small>(Pax) S.Carter</small> (s)
** *Euphorbia nyikae var. nyikae* (s)

== O ==

* *Euphorbia oatesii* <small>Rolfe</small> (s)
* *Euphorbia oaxacana* <small>B.L.Rob. & Greenm.</small> (s)
* *Euphorbia obconica* <small>Bojer ex N.E.Br.</small>
* *Euphorbia obcordata* <small>Balf.f.</small> (s)
* *Euphorbia obesa* <small>Hook.f.</small> (s)
** *Euphorbia obesa subsp. obesa* (s)
** *Euphorbia obesa subsp. symmetrica* <small>(A.C.White, R.A.Dyer & B.Sloane) G.D.Rowley</small> (s)
* *Euphorbia oblanceolata* <small>Balf.f.</small> (s)
* *Euphorbia obliqua* <small>F.Bauer ex Endl.</small>
* *Euphorbia oblongata* <small>Griseb</small> 
* *Euphorbia oblongifolia* <small>(K.Koch) K.Koch</small>
* *Euphorbia obovata* <small>Decne.</small> (s)
* *Euphorbia obtusata* <small>Pursh</small>
* *Euphorbia occidentaustralica* <small>Radcl.-Sm. & Govaerts</small>
* *Euphorbia ocellata* <small>Durand & Hilg.</small>
** *Euphorbia ocellata subsp. arenicola* <small>(Parisch) Oudejans</small>
** *Euphorbia ocellata subsp. ocellata*
** *Euphorbia ocellata subsp. rattanii* <small>(S.Watson) Oudejans</small>
* *Euphorbia octoradiata* <small>H.Lév. & Vaniot ex H.Lév.</small>
* *Euphorbia ocymoidea* <small>L.</small>
* *Euphorbia odontadenia* <small>Boiss.</small>
* *Euphorbia odontophora* <small>S.Carter</small> (s)
* *Euphorbia oerstediana* <small>(Klotzsch & Garcke ex Klotzsch) Boiss.</small> 
* *Euphorbia officinalis* <small>Forssk.</small>
* *Euphorbia officinarum* <small>L.</small> (s)
* *Euphorbia ogadenensis* <small>P.R.O.Bally & S.Carter</small> (s)
* *Euphorbia oidorhiza* <small>Pojark.</small>
* *Euphorbia oligoclada* <small>L.C.Leach</small> (s)
* *Euphorbia olowaluana* <small>Sherff</small> 
* *Euphorbia omariana* <small>M.G.Gilbert</small> (s)
* *Euphorbia ophthalmica* <small>Rers.</small>
* *Euphorbia opuntioides* <small>Welw. ex Hiern</small> (s)
* *Euphorbia orabensis* <small>Dinter</small>
* *Euphorbia oranensis* <small>(Croizat) Subils</small>
* *Euphorbia orbiculata* <small>Kunth</small>
* *Euphorbia orbiculifolia* <small>S.Carter</small> (s)
* *Euphorbia orbifolia* <small>(Alain) Oudejans</small>
* *Euphorbia orientalis* <small>L.</small>
* *Euphorbia origanoides* <small>L.</small>
* *Euphorbia orizabae* <small>Boiss.</small>
* *Euphorbia ornithopus* <small>Jacq.</small> (s)
* *Euphorbia orobanchoides* <small>(P.R.O.Bally) Bruyns</small> (s) (= *Monadenium orobanchoides*)
** *Euphorbia orobanchoides var. calycina* <small>(P.R.O.Bally) Bruyns</small> (s) (= *Monadenium orobanchoides* var. *calycinum*)
** *Euphorbia orobanchoides var. orobanchoides* (s) (= *Monadenium orobanchoides* var. *orobanchoides*)
* *Euphorbia orphanidis* <small>Boiss.</small>
* *Euphorbia orthoclada* <small>Baker</small> (s)
** *Euphorbia orthoclada subsp. orthoclada* (s)
** *Euphorbia orthoclada subsp. vepretorum* <small>(Drake) Leandri</small> (s)
* *Euphorbia oryctis* <small>Dinter</small>
* *Euphorbia oschtenica* <small>Galushko</small>
* *Euphorbia osyridae* <small>Boiss.</small>
* *Euphorbia osyridiformis* <small>Parsa</small>
* *Euphorbia otjipembana* <small>L.C.Leach</small> (s)
* *Euphorbia ouachitana* <small>Mayfield</small>
* *Euphorbia ovalleana* <small>Phil.</small>
* *Euphorbia ovata* <small>(Klotzsch & Garcke ex Klotzsch) Boiss.</small>
* *Euphorbia oxycoccoides* <small>Boiss.</small>
* *Euphorbia oxyodonta* <small>Boiss. & Hausskn. ex Boiss.</small>
* *Euphorbia oxyphylla* <small>Boiss.</small> (s)
* *Euphorbia oxystegia* <small>Boiss.</small> (s)

== P ==

* *Euphorbia pachyclada* <small>S.Carter</small> (s)
* *Euphorbia pachypoda* <small>Urb.</small>
* *Euphorbia pachypodioides* <small>Boiteau</small> (s)
* *Euphorbia pachyrrhiza* <small>Kar. & Kir.</small>
* *Euphorbia pachysantha* <small>Baill.</small> (s)
* *Euphorbia paganorum* <small>A.Chev.</small> (s)
* *Euphorbia palmeri* <small>Engelm. ex S.Watson</small> 
* *Euphorbia paludicola* <small>McVaugh</small>
* *Euphorbia palustris* <small>L.</small>
* *Euphorbia pamirica* <small>(Prokh.) Prokh.</small>
* *Euphorbia pampeana* <small>Speg.</small> (s)
* *Euphorbia pancheri* <small>Baillon</small> (s)
* *Euphorbia panchganiensis* <small>Blatt. & McCann ex Blatt.</small> (s)
* *Euphorbia pancicii* <small>G.Beck</small>
* *Euphorbia paniculata* <small>Desf.</small>
* *Euphorbia panjutinii* <small>Grossh.</small>
* *Euphorbia pantomalaca* <small>Standl. & Steyerm.</small> (s)
* *Euphorbia papilionum* <small>S.Carter</small> (s)
* *Euphorbia papillaris* <small>(Jan ex Boiss.) Raffaelli & Ricceri</small> (s)
* *Euphorbia papillosa* <small>A.St.-Hil.</small> (s)
** *Euphorbia papillosa var. erythrorrhiza* <small>(Boiss.) Subils</small> (s)
** *Euphorbia papillosa var. papillosa* (s)
* *Euphorbia papillosicapsa* <small>L.C.Leach</small> (s)
* *Euphorbia paradoxa* <small>(Schur) Simonk.</small>
* *Euphorbia paraikalli* <small>B.De Jong, Malpure & Mahalingam</small>
* *Euphorbia paralias* <small>L.</small>
* *Euphorbia paranensis* <small>Dusén</small>
* *Euphorbia parciflora* <small>Urb.</small>
* *Euphorbia parciramulosa* <small>Schweinf.</small> (s)
* *Euphorbia paredonensis* <small>(Millsp.) Oudejans</small>
* *Euphorbia parifolia* <small>N.E.Br.</small>
* *Euphorbia parishii* <small>Greene</small>
* *Euphorbia parodii* <small>Oudejans</small>
* *Euphorbia parryi* <small>Engelm.</small>
* *Euphorbia parva* <small>N.E.Br.</small>
* *Euphorbia parvicaruncula* <small>D.C.Hassall</small> (s)
* *Euphorbia parviceps* <small>L.C.Leach</small> (s)
* *Euphorbia parvicyathophora* <small>Rauh</small> (s)
* *Euphorbia parviflora* <small>L.</small>
* *Euphorbia parvula* <small>Delile</small>
* *Euphorbia patula* <small>P.Miller</small>
* *Euphorbia patentispina* <small>S.Carter</small> (s)
* *Euphorbia paucipila* <small>Urb.</small>
* *Euphorbia pauciradiata* <small>Blatt.</small>
* *Euphorbia paulianii* <small>Ursch & Leandri</small> (s)
* *Euphorbia paxiana* <small>Dinter</small>
* *Euphorbia pedemontana* <small>L.C.Leach</small> (s)
* *Euphorbia pedersenii* <small>Subils</small>
* *Euphorbia pediculifera* <small>Engelm.</small>
* *Euphorbia pedilanthoides* <small>Denis</small> (s)
* *Euphorbia pedroi* <small>Molero & Rovira</small> (s)
* *Euphorbia peganoides* <small>Boiss.</small>
* *Euphorbia peisonis* <small>Rech.</small>
* *Euphorbia pekinensis* <small>Rupr.</small>
** *Euphorbia pekinensis subsp. asoensis* <small>Kurosawa & H.Ohashi</small>
** *Euphorbia pekinensis subsp. fauriei* <small>Kurosawa & H.Ohashi</small>
** *Euphorbia pekinensis subsp. lasiocaula* <small>Boiss. & Oudejans</small>
** *Euphorbia pekinensis subsp. pekinensis*
** *Euphorbia pekinensis subsp. pseudolucorum* <small>Hurus. & Oudejans</small>
** *Euphorbia pekinensis subsp. sinanensis* <small>Hurus. & Oudejans</small>
** *Euphorbia pekinensis subsp. subulatifolius* <small>Hurus. & T.B.Lee</small>
** *Euphorbia pekinensis subsp. watanabei* <small>Makino & Oudejans</small>
* *Euphorbia pellegrinii* <small>Leandri</small>
* *Euphorbia peltata* <small>Roxb.</small>
* *Euphorbia peninsularis* <small>I.M.Johnst.</small>
* *Euphorbia pentadactyla* <small>Griseb</small>
* *Euphorbia pentagona* <small>Haw.</small> (s)
* *Euphorbia pentlandii* <small>Boiss.</small>
* *Euphorbia pentops* <small>A.C.White, R.A.Dyer & B.Sloane</small> (s)
* *Euphorbia peperomioides* <small>Boiss.</small>
* *Euphorbia peplidion* <small>Engelm.</small> 
* *Euphorbia peplis* <small>L.</small>
* *Euphorbia peplus* <small>L.</small>
* *Euphorbia perangusta* <small>R.A.Dyer</small> (s)
* *Euphorbia perangustifolia* <small>S.Carter</small>
* *Euphorbia perarmata* <small>S.Carter1992</small> (s)
* *Euphorbia perbracteata* <small>Gage</small>
* *Euphorbia perennans* <small>(Shinners) Warnock & I.M.Johnst.</small>
* *Euphorbia pereskiifolia* <small>Baill.</small> (s) (= *Synadenium pereskiifolium*)
* *Euphorbia perfoliata* <small>Scheutz</small>
* *Euphorbia pergracilis* <small>P.G.Mey.</small>
* *Euphorbia peritropoides* <small>(Millsp.) V.W.Steinm.</small> (= *Pedilanthus peritropoides*)
* *Euphorbia perlignea* <small>McVaugh</small>
* *Euphorbia perpera* <small>N.E.Br.</small> (s)
* *Euphorbia perplexa* <small>L.C.Leach</small> (s)
** *Euphorbia perplexa var. kasamana* <small>L.C.Leach</small> (s)
** *Euphorbia perplexa var. perplexa* (s)
* *Euphorbia perrieri* <small>Drake</small> (s)
** *Euphorbia perrieri var. elongata* <small>Denis</small> (s)
** *Euphorbia perrieri var. perrieri* (s)
* *Euphorbia persistentifolia* <small>L.C.Leach</small> (s)
* *Euphorbia personata* <small>Croizat & V.W.Steinm.</small> (s) (= *Pedilanthus personatus*)
* *Euphorbia peruviana* <small>L.C.Wheeler</small>
* *Euphorbia pervilleana* <small>Baillon</small> (s)
* *Euphorbia pestalozzae* <small>Boiss.</small>
* *Euphorbia petala* <small>Ewart & L.R.Kerr</small>
* *Euphorbia pervittata* <small>S.Carter</small> (s)
* *Euphorbia petiolaris* <small>Sims</small> (s) 
* *Euphorbia petiolata* <small>Banks & Sol.</small>
* *Euphorbia petitiana* <small>A.Rich.</small>
* *Euphorbia petraea* <small>S.Carter</small> (s)
* *Euphorbia petricola* <small>P.R.O.Bally & S.Carter</small> (s)
* *Euphorbia petrina* <small>S.Watson</small>
* *Euphorbia petrophila* <small>C.A.Mey.</small>
* *Euphorbia pettersonii* <small>Svent.</small>
* *Euphorbia pfeilii* <small>Pax</small>
* *Euphorbia philippiana* <small>(Klotzsch & Garcke ex Klotzsch) Boiss.</small>
* *Euphorbia phillipsiae* <small>N.E.Br.</small> (s)
* *Euphorbia phillipsioides* <small>S.Carter</small> (s)
* *Euphorbia phosphorea* <small>Mart.</small> (s)
* *Euphorbia phylloclada* <small>Boiss.</small> (s)
* *Euphorbia phymatosperma* <small>Boiss. & Gaill. ex Boiss.</small>
** *Euphorbia phymatosperma subsp. cernua* <small>(Coss. & Durieu) Vindt</small>
** *Euphorbia phymatosperma subsp. phymatosperma*
* *Euphorbia physalifolia* <small>Boiss.</small>
* *Euphorbia phosocaulos* <small>Mouterde</small>
* *Euphorbia physoclada* <small>Boiss.</small> (s)
* *Euphorbia picachensis* <small>Brandegee</small>
* *Euphorbia pillansii* <small>N.E.Br.</small> (s)
** *Euphorbia pillansii var. albovirens* <small>A.C.White, R.A.Dyer & B.Sloane</small> (s)
** *Euphorbia pillansii var. pillansii* (s)
** *Euphorbia pillansii var. ramosissima* <small>A.C.White, R.A.Dyer & B.Sloane</small> (s)
* *Euphorbia pilosa* <small>L.</small>
** *Euphorbia pilosa subsp. ojensis* <small>Stepanov</small>
** *Euphorbia pilosa subsp. pilosa*
* *Euphorbia pilosissima* <small>S.Carter</small>
* *Euphorbia pinariona* <small>Urb.</small>
* *Euphorbia pinetorum* <small>(Small) G.L.Webster</small> 
* *Euphorbia pinkavana* <small>I.M.Johnst.</small>
* *Euphorbia pionosperma* <small>V.W.Steinm. & Felger</small>
* *Euphorbia pirottae* <small>A.Terracc.</small> (s)
* *Euphorbia piscatoria* <small>Aiton</small> (s)
* *Euphorbia piscidermis* <small>M.G.Gilbert</small> (s)
* *Euphorbia piscida* <small>Hub.-Mor. & M.S.Khan ex M.S.Khan</small>
* *Euphorbia pitcairnensis* <small>N.E.Br.</small>
* *Euphorbia pithyusa* <small>L.</small>
** *Euphorbia pithyusa subsp. cupanii* <small>(Guss. ex Bertol.) Radcl.-Sm.</small>
** *Euphorbia pithyusa subsp. dianthifolia* <small>(Lojac.) Oudejans</small>
** *Euphorbia pithyusa subsp. pithyusa*
* *Euphorbia plagiantha* <small>Drake</small> (s)  
* *Euphorbia planiceps* <small>A.C.White, R.A.Dyer & B.Sloane</small> (s)
* *Euphorbia planiticola* <small>D.C.Hassall</small> (s)
* *Euphorbia platycephala* <small>Pax</small> (s)
* *Euphorbia platyclada* <small>Rauh</small> (s)
** *Euphorbia platyclada var. hardyi* <small>Rauh</small> (s)
** *Euphorbia platyclada var. platyclada* (s)
* *Euphorbia platyphyllos* <small>L.</small> 
* *Euphorbia platypoda* <small>Pax</small>
* *Euphorbia platyrrhiza* <small>L.C.Leach</small> (s)
* *Euphorbia platysperma* <small>Engelm. ex S.Watson</small>
* *Euphorbia plebeia* <small>Boiss.</small>
* *Euphorbia plenispina* <small>S.Carter</small> (s)
* *Euphorbia plicata* <small>S.Watson</small>
* *Euphorbia plumerioides* <small>Teijsm. ex Hassk.</small> (s)
* *Euphorbia plummeriae* <small>S.Watson</small>
* *Euphorbia podadenia* <small>Boiss.</small>
* *Euphorbia podocarpifolia* <small>Urb.</small> (s)
* *Euphorbia poecilophylla* <small>(Prokh.) Prokh.</small>
* *Euphorbia poeppigii* <small>(Klotzsch & Garcke ex Klotzsch) Boiss.</small>
* *Euphorbia poissonii* <small>Pax</small> (s)
* *Euphorbia polyacantha* <small>Boiss.</small> (s)
* *Euphorbia polyantha* <small>Pax</small> (s)
* *Euphorbia polycarpa* <small>Benth.</small>
* *Euphorbia polycephala* <small>Marloth</small> (s)
* *Euphorbia polychroma* <small>Anton Josef Kerner</small> (jereo koa *Euphorbia epithymoides*)
* *Euphorbia polycnemoides* <small>Hochst. ex Boiss.</small>
* *Euphorbia polygalifolia* <small>Boiss. & Reut. ex Boiss.</small>
* *Euphorbia polygona* <small>Haw.</small> (s)
* *Euphorbia polygonifolia* <small>L.</small>
* *Euphorbia polyphylla* <small>Engelm. ex Holz.</small> -
* *Euphorbia polytimetica* <small>(Prokh.) Prokh.</small>
* *Euphorbia ponderosa* <small>S.Carter</small> (s)
* *Euphorbia pondii* <small>Millsp.</small>
* *Euphorbia popayanensis* <small>Prokh.</small>
* *Euphorbia porphyrantha* <small>Phil.</small> (s)
* *Euphorbia porphyrastra* <small>Hand.-Mazz.</small>
* *Euphorbia porteriana* <small>(Small) Oudejans</small>
** *Euphorbia porteriana var. keyensis* <small>(Small) Oudejans</small>
** *Euphorbia porteriana var. porteriana*
** *Euphorbia porteriana var. scoparia* <small>(Small) Oudejans</small>
* *Euphorbia portlandica* <small>L.</small> 
* *Euphorbia portucasadiana* <small>(Croizat) Subils</small>
* *Euphorbia portulacoides* <small>L.</small> (s)
** *Euphorbia portulacoides subsp. collina* <small>(Phil.) Croizat</small> (s)
** *Euphorbia portulacoides subsp. major* <small>(Müll.Arg.) Croizat</small> (s)
** *Euphorbia portulacoides subsp. portulacoides* (s)
* *Euphorbia postii* <small>Boiss.</small>
* *Euphorbia potanii* <small>Prokh.</small>
* *Euphorbia potentilloides* <small>Boiss.</small>
* *Euphorbia potosina* <small>Fernald</small>
* *Euphorbia prieuriana* <small>Baillon</small>
* *Euphorbia primulifolia* <small>Baker</small> (s)
** *Euphorbia primulifolia var. begardii* <small>Cremers</small> (s)
** *Euphorbia primulifolia var. primulifolia* (s)
* *Euphorbia proballyana* <small>L.C.Leach</small> (s)
** *Euphorbia proballyana var. multangula* <small>S.Carter</small> (s)
** *Euphorbia proballyana var. proballyana* (s)
* *Euphorbia proctorii* <small>(D.G.Burch) Correll</small>
* *Euphorbia prolifera* <small>Buch.-Ham. ex D.Don</small>
* *Euphorbia promeocarpa* <small>P.H.Davis</small>
* *Euphorbia prona* <small>S.Carter</small> (s)
* *Euphorbia propingua* <small>N.E.Br.</small>
* *Euphorbia prostrata* <small>Aiton</small>
** *Euphorbia prostrata subsp. caudirhiza* <small>Fosberg</small>
** *Euphorbia prostrata subsp. prostrata*
* *Euphorbia przewalskii* <small>Prokh.</small>
* *Euphorbia psammophila* <small>Ule</small> (s)
* *Euphorbia pseudagraria* <small>P.A.Smirn.</small>
* *Euphorbia pseudoapios* <small>Maire & Weiller</small> (s)
* *Euphorbia pseudoburuana* <small>P.R.O.Bally & S.Carter</small> (s)
* *Euphorbia pseudocactus* <small>A.Berger</small> (s)
* *Euphorbia pseudodendroides* <small>H.Lindb.</small>
* *Euphorbia pseudoduseimata* <small>R.A.Dyer</small> (s)
* *Euphorbia pseudofalcata* <small>Chiov.</small>
* *Euphorbia pseudofulva* <small>Miranda</small>
* *Euphorbia pseudoglareosa* <small>Klokov</small>
* *Euphorbia pseudoglobosa* <small>Marloth</small> (s)
* *Euphorbia pseudograntii* <small>Pax</small> (s)
* *"Euphorbia pseudograntii"* <small>Bruyns 2006 (*non* Pax: preoccupied)</small> (s) (= *Synadenium grantii*)
* *Euphorbia pseudohirsuta* <small>Bruyns</small> (s) (= *Monadenium hirsutum*)
* *Euphorbia pseudohypogaea* <small>Dinter</small> (s)
* *Euphorbia pseudolaevis* <small>Bruyns</small> (s) (= *Monadenium laeve*)
* *Euphorbia pseudolucida* <small>Schur</small>
* *Euphorbia pseudomollis* <small>Bruyns</small> (s) (= *Synadenium molle*)
* *Euphorbia pseudonervosa* <small>Bruyns</small> (s) (= *Monadenium nervosum*)
* *Euphorbia pseudonudicaulis* <small>Bruyns</small> (s) (= *Monadenium nudicaule*)
* *Euphorbia pseudopetiolata* <small>Bruyns</small> (s) (= *Monadenium petiolatum*)
* *Euphorbia pseudoracemosa* <small>(P.R.O.Bally) Bruyns</small> (s) (= *Monadenium pseudoracemosum*)
** *Euphorbia pseudoracemosa var. lorifolia* <small>(P.R.O.Bally) Bruyns</small> (s) (= *Monadenium pseudoracemosum* var. *lorifolium*)
** *Euphorbia pseudoracemosa var. pseudoracemosa* (s) (= *Monadenium pseudoracemosum* var. *pseudoracemosum*)
* *Euphorbia pseudosikkimensis* <small>(Hurus. & Tanaka) Radcl.-Sm.</small>
* *Euphorbia pseudosimplex* <small>Bruyns</small> (s) (= *Monadenium simplex*)
* *Euphorbia pseudostellata* <small>Bruyns</small> (s) (= *Monadenium stellatum*)
* *Euphorbia pseudotrinervis* <small>Bruyns</small> (s) (= *Monadenium trinerve*)
* *Euphorbia pseudotuberosa* <small>Pax</small> (s)
* *Euphorbia pseudovolkensii* <small>Bruyns</small> (s) (= *Synadenium volkensii*)
* *Euphorbia pteroclada* <small>L.C.Leach</small> (s)
* *Euphorbia pterococca* <small>Brot.</small>
* *Euphorbia pteroneura* <small>A.Berger</small> (s)
* *Euphorbia pubentissima* <small>Michx.</small>
* *Euphorbia puberula* <small>Fernald</small>
* *Euphorbia pubicaulis* <small>S.Moore</small>
* *Euphorbia pubiglans* <small>N.E.Br.</small> (s)
* *Euphorbia pudibunda* <small>(P.R.O.Bally) Bruyns</small> (s) (= *Monadenium pudibundum*)
* *Euphorbia pudibunda var. lanata* <small>(S.Carter) Bruyns</small> (s) (= *Monadenium pudibundum* var. *lanatum*)
* *Euphorbia pudibunda var. rotundifolia* <small>(Malaysse & Lecron) Bruyns</small> (s) (= *Monadenium pudibundum* var. *rotundifolium*)
* *Euphorbia pudibunda var. pudibunda* (s) (= *Monadenium pudibundum* var. *pudibundum*)
* *Euphorbia pueblensis* <small>Brandegee</small>
* *Euphorbia pugniformis* <small>Boiss.</small> (s)
* *Euphorbia pulcherrima* <small>Willd. ex Klotzsch</small> (s)
* *Euphorbia pulvinata* <small>Marloth</small> (s)
* *Euphorbia pumicicola* <small>Huft</small>
* *Euphorbia punctata* <small>Delile</small>
* *Euphorbia punctulata* <small>Andersson</small>
* *Euphorbia punicea* <small>Sw.</small> (s)
* *Euphorbia purpurea* <small>(Raf.) Fernald</small>
* *Euphorbia pusilla* <small>Lag.</small>
* *Euphorbia pycnostegia* <small>Boiss.</small>
* *Euphorbia pygmaea* <small>Ledeb.</small>
* *Euphorbia pyrenaica* <small>Jord.</small>
* *Euphorbia pyrifolia* <small>Lam.</small> (s)
** *Euphorbia pyrifolia var. coriacea* <small>Radcl.-Sm.</small> (s)
** *Euphorbia pyrifolia var. pyrifolia* (s)

== Q ==

* Top
* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z

* *Euphorbia qarad* <small>Deflers</small> (s)
* *Euphorbia quadrangularis* <small>Pax</small> (s)
* *Euphorbia quadrata* <small>Nel</small> (s)
* *Euphorbia quadrialata* <small>Pax</small> (s)
* *Euphorbia quadrilatera* <small>L.C.Leach</small> (s)
* *Euphorbia quadrispina* <small>S.Carter</small> (s)
* *Euphorbia quaitensis* <small>S.Carter</small> (s)
* *Euphorbia quartziticola* <small>Leandri</small> (s)
* *Euphorbia quinquecostata* <small>Volkens</small> (s)
* *Euphorbia quintasii* <small>Jord.</small>
* *Euphorbia quitensis* <small>Boiss.</small>

== R ==

* *Euphorbia radians* <small>Benth.</small> (s)
** *Euphorbia radians var. radians* (s)
** *Euphorbia radians var. stormiae* <small>(Croizat) Rzed. & S.Calderón</small> (s)
* *Euphorbia radiifera* <small>L.C.Leach</small>
* *Euphorbia radioloides* <small>Boiss.</small>
* *Euphorbia ramiglans* <small>N.E.Br.</small> (s)
* *Euphorbia ramofraga* <small>Denis & Humbert ex Leandri</small> (s)
* *Euphorbia ramosa* <small>Seaton</small>
* *Euphorbia ramipressa* <small>Croizat</small>
* *Euphorbia ramulosa* <small>L.C.Leach</small> (s)
* *Euphorbia randrianjohanyi* <small>Haev. & Labat</small>
* *Euphorbia rangovalensis* <small>Leandri</small> (s)
* *Euphorbia raphanorrhiza* <small>(Millsp.) J.F.Macbr.</small>
* *Euphorbia raphilippii* <small>Oudejans</small>
* *Euphorbia rapulum* <small>Kar. & Kir.</small> (s)
* *Euphorbia rauhii* <small>Haev. & Labat</small>
* *Euphorbia razafindratsirae* <small>Lavranos</small> (s)
* *Euphorbia razafinjohanyi* <small>Ursch & Leandri</small> (s)
* *Euphorbia reboudiana* <small>Coss. ex Batt. & Trab.</small>
* *Euphorbia reclinata* <small>P.R.O.Bally & S.Carter</small> (s)
* *Euphorbia reconciliationis* <small>Radcl.-Sm.</small>
* *Euphorbia rectirama* <small>N.E.Br.</small> (s)
* *Euphorbia recurva* <small>Hook.f.</small>
* *Euphorbia refugii* <small>Croizat</small>
* *Euphorbia reghinii* <small>(Chiov.) Vollesen</small>
* *Euphorbia regis-jubae* <small>Webb & Berthel.</small> (s)
* *Euphorbia reineckei* <small>Pax ex Reinecke</small>
* *Euphorbia remyi* <small>A.Gray ex Boiss.</small>
* *Euphorbia reniformis* <small>Blume</small>
* *Euphorbia renneyi* <small>(S.Carter) Bruyns</small> (s) (= *Monadenium renneyi*)
* *Euphorbia repanda* <small>(Haw.) Sweet</small>
* *Euphorbia repens* <small>K.Koch</small>
* *Euphorbia repetita* <small>Hochst. ex A.Rich.</small>
* *Euphorbia reptans* <small>P.R.O.Bally & S.Carter</small> (s)
* *Euphorbia resinifera* <small>Berg</small> (s) 
* *Euphorbia restiacea* <small>Benth.</small> (s)
* *Euphorbia restituta* <small>N.E.Br.</small> (s)
* *Euphorbia restricta* <small>R.A.Dyer</small> (s)
* *Euphorbia retusa* <small>Forssk.</small>
* *Euphorbia retrospina* <small>Rauh & Gérold</small> (s)
* *Euphorbia reuteriana* <small>Boiss.</small>
* *Euphorbia revoluta* <small>Engelm.</small>
* *Euphorbia rhabdodes* <small>Boiss.</small> (s)
* *Euphorbia rhabdotosperma* <small>Radcl.-Sm.</small>
* *Euphorbia rhizophora* <small>(P.R.O.Bally) Bruyns</small> (s) (= *Monadenium rhizophorum*)
* *Euphorbia rhombifolia* <small>Boiss.</small> (s)
* *Euphorbia rhytidosperma* <small>Boiss. & Balansa ex Boiss.</small>
* *Euphorbia rhytisperma* <small>(Klotzsch & Garcke) Engelm. ex Boiss.</small>
* *Euphorbia richardsiae* <small>L.C.Leach</small> (s)
** *Euphorbia richardsiae subsp. richardsiae* (s)
** *Euphorbia richardsiae subsp. robusta* <small>L.C.Leach</small> (s)
* *Euphorbia riebeckii* <small>Pax</small> (s)
* *Euphorbia rigida* <small>M.Bieb.</small> (s)
* *Euphorbia rimarum* <small>Coss. & Balansa ex Coss.</small>
* *Euphorbia ritchiei* <small>(P.R.O.Bally) Bruyns</small> (s) (= *Monadenium ritchiei*)
** *Euphorbia ritchiei subsp. marsabitensis* <small>(S.Carter) Bruyns</small> (s) (= *Monadenium ritchiei* subsp. *marsabitense*)
** *Euphorbia ritchiei subsp. nyambensis* <small>(S.Carter) Bruyns</small> (s) (= *Monadenium ritchiei* subsp. *nyambense*)
** *Euphorbia ritchiei subsp. ritchiei* (s) (= *Monadenium ritchiei* subsp. *ritchiei*)
* *Euphorbia rivae* <small>Pax</small> (s)
* *Euphorbia robecchii* <small>Pax</small> (s)
* *Euphorbia robivelonae* <small>Rauh</small> (s)
* *Euphorbia rochaensis* <small>(Croizat) Alonso Paz & Marchesi</small>
* *Euphorbia rockii* <small>C.N.Forbes</small>
* *Euphorbia rockii var. rockii* <small>C.N.Forbes</small>
** *Euphorbia rockii var. grandiflora* <small>(Hillebrand) Oudejans</small>
** *Euphorbia rockii var. rockii*
* *Euphorbia roemeriana* <small>Scheele</small> - Roemer's spurge
* *Euphorbia rohlenae* <small>Velen.</small>
* *Euphorbia roschanica* <small>(Ikonn.) Czerep.</small>
* *Euphorbia rosea* <small>Retz.</small>
* *Euphorbia roseana* <small>(Marn.-Lap. ex Demoly) J.-P.Castillon & J.-B.Castillon</small> (s)
* *Euphorbia rosescens* <small>E.L.Bridges & Orzell</small>
* *Euphorbia rossiana* <small>Pax</small> (s)
* *Euphorbia rossii* <small>Rauh & Buchloh</small> (s)
* *Euphorbia rosularis* <small>Al.Fed.</small>
* *Euphorbia rothiana* <small>Spreng.</small>
* *Euphorbia rothrockii* <small>(Millsp.) Oudejans</small>
* *Euphorbia rowlandii* <small>R.A.Dyer</small> (s)
* *Euphorbia royleana* <small>Boiss.</small> (s) - Churee
* *Euphorbia rubella* <small>Pax</small> (s)
* *Euphorbia rubriflora* <small>N.E.Br.</small>
* *Euphorbia rubromarginata* <small>L.E.Newton</small> (s)
* *Euphorbia rubriseminalis* <small>S.Carter</small> (s)
* *Euphorbia rubrispinosa* <small>S.Carter</small> (s)
* *Euphorbia rubrostriata* <small>Drake</small>
* *Euphorbia rudis* <small>N.E.Br.</small> (s)
* *Euphorbia rudolfii* <small>N.E.Br.</small> (s)
* *Euphorbia ruficeps* <small>S.Carter</small> (s)
* *Euphorbia rugosiflora* <small>L.C.Leach</small> (s)
* *Euphorbia ruizlealii* <small>Subils</small>
* *Euphorbia rupestris* <small>C.A.Mey. ex Ledeb.</small>
* *Euphorbia ruscifolia* <small>Boiss.</small>
* *Euphorbia ruscinonensis* <small>Boiss.</small>
* *Euphorbia rutilis* <small>(Millsp.) Standl. & Steyerm.</small>
* *Euphorbia rzedowskii* <small>McVaugh</small>

== S ==

* W
* X
* Y
* Z

* *Euphorbia sabulicola* <small>Boiss.</small>
* *Euphorbia saccharata* <small>Boiss.</small>
* *Euphorbia sachetiana* <small>(J.Florence) Govaerts</small>
* *Euphorbia sahendi* <small>Bornm.</small>
* *Euphorbia sajanensis* <small>(Boiss.) Baikov</small>
* *Euphorbia sakarahaensis* <small>Rauh</small> (s)
* *Euphorbia salicifolia* <small>Host</small>
* *Euphorbia salsicola* <small>S.Carter</small>
* *Euphorbia salota* <small>Leandri</small> (s)
* *Euphorbia salsuginosa* <small>(McVaugh) Radcl.-Sm. & Govaerts</small>
* *Euphorbia samburuensis* <small>P.R.O.Bally & S.Carter</small> (s)
* *Euphorbia sampsonii* <small>Hance</small>
* *Euphorbia sanasunitensis* <small>Hand.-Mazz.</small>
* *Euphorbia sancta* <small>Pax</small>
* *Euphorbia sanctaecatharinae* <small>A.A.Fayad</small>
* *Euphorbia sanmartensis* <small>Rusby</small>
* *Euphorbia santapaui* <small>A.N.Henry</small> (s)
* *Euphorbia sapiifolia* <small>Baillon</small>
* *Euphorbia sapinii* <small>De Wild.</small> (s)
* *Euphorbia sarawschanica* <small>Regel</small>
* *Euphorbia sarcodes* <small>Boiss.</small> (s)
* *Euphorbia sarcostemmatoides* <small>Dinter</small>
* *Euphorbia sarcostemmoides* <small>J.H.Willis</small> (s)
* *Euphorbia sareptana* <small>A.Becker</small>
* *Euphorbia sarmentosa* <small>Welw. ex Pax</small>
* *Euphorbia saurica* <small>Baikov</small>
* *Euphorbia saxatilis* <small>Jacq.</small>
* *Euphorbia saxicola* <small>Radcl.-Sm.</small>
* *Euphorbia saxorum* <small>P.R.O.Bally & S.Carter</small> (s)
* *Euphorbia scabrifolia* <small>S.Kurz</small>
* *Euphorbia scandens* <small>Kunth</small>
* *Euphorbia scarlatina* <small>S.Carter</small> (s)
* *Euphorbia scatorrhiza* <small>S.Carter</small> (s)
* *Euphorbia schaijesii* <small>(Malaisse) Bruyns</small> (s) (= *Monadenium schaijesii*)
* *Euphorbia scheffleri* <small>Pax</small> (s)
* *Euphorbia schickendantzii* <small>Hieron.</small>
* *Euphorbia schillingii* <small>Radcl.-Sm.</small>
* *Euphorbia schimperi* <small>C.Presl</small> (s)
* *Euphorbia schimperiana* <small>Scheele</small>
** *Euphorbia schimperiana* var. *pubescens* <small>(N.E.Br.) S.Carter</small>
** *Euphorbia schimperiana* var. *schimperiana*
** *Euphorbia schimperiana* var. *velutina* <small>N.E.Br.</small>
* *Euphorbia schinzii* <small>Pax</small> (s)
* *Euphorbia schizacantha* <small>Pax</small> (s)
* *Euphorbia schizolepis* <small>F.Muell. ex Boiss.</small>
* *Euphorbia schizoloba* <small>Engelm.</small>
* *Euphorbia schlechtendalii* <small>Boiss.</small> (s)
** *Euphorbia schlechtendalii* var. *pacifica* <small>McVaugh</small>
** *Euphorbia schlechtendalii* var. *schlechtendalii*
** *Euphorbia schlechtendalii* var. *websteri* <small>McVaugh</small>
* *Euphorbia schlechteri* <small>Pax</small>
* *Euphorbia schmitzii* <small>L.C.Leach</small> (s)
* *Euphorbia schoenlandii* <small>Pax</small> (s)
* *Euphorbia schottiana* <small>Boiss.</small>
* *Euphorbia schubei* <small>Pax</small> (s) (= *Monadenium schubei*)
* *Euphorbia schugnanica* <small>B.Fedtsch. ex O.Fedtsch. & B.Fedtsch.</small> (s)
* *Euphorbia schultzii* <small>Benth.</small>
* *Euphorbia schumannii* <small>Radcl.-Sm.</small>
* *Euphorbia schweinfurthii* <small>Balf.f.</small> (s)
* *Euphorbia sciadophila* <small>Boiss.</small>
* *Euphorbia scitula* <small>L.C.Leach</small> (s)
* *Euphorbia sclerocyathium* <small>Korovin & Popov</small>
* *Euphorbia sclerophylla* <small>Boiss.</small>
* *Euphorbia scopulorum* <small>Brandegee</small>
* *Euphorbia scordiifolia* <small>Jacq.</small>
* *Euphorbia scotanum* <small>Schltdl.</small> (s)
* *Euphorbia scripta* <small>Sommier & Levier</small>
* *Euphorbia scyphadena* <small>S.Carter</small> (s)
* *Euphorbia seclusa* <small>N.E.Br.</small>
* *Euphorbia sebsebei* <small>M.G.Gilbert</small> (s)
* *Euphorbia segetalis* <small>L.</small> – Grainfield spurge
* *Euphorbia segoviensis* <small>(Klotzsch & Garcke ex Klotzsch) Boiss.</small>
* *Euphorbia seguieriana* <small>Neck.</small>
** *Euphorbia seguieriana* subsp. *loiseleurii* <small>(Rouy) Greuter & Burdet</small>
** *Euphorbia seguieriana* subsp. *niciciana* <small>(Borbás ex J. Novák) Rech.f.</small>
** *Euphorbia seguieriana* subsp. *seguieriana*
*** *Euphorbia seguieriana* subsp. *seguieriana* var. *arenivaga* <small>(Martin-Donos) Oudejans</small>
*** *Euphorbia seguieriana* subsp. *seguieriana* var. *dentata* <small>(Chabert) Oudejans</small>
*** *Euphorbia seguieriana* subsp. *seguieriana* var. *intermedia* <small>(S?vul.) Oudejans</small>
*** *Euphorbia seguieriana* subsp. *seguieriana* var. *lanceolata* <small>(Cariot) Oudejans</small>
*** *Euphorbia seguieriana* subsp. *seguieriana* var. *latifolia* <small>(J.J.Schmitz & Regel) Oudejans</small>
*** *Euphorbia seguieriana* subsp. *seguieriana var. seguieriana*
*** *Euphorbia seguieriana* subsp. *seguieriana var. sturii* <small>(Holuby) Oudejans</small>
* *Euphorbia seibanica* <small>Lavranos & A.N.Al-Gifri</small> (s)
* *Euphorbia sekukuniensis* <small>R.A.Dyer</small> (s)
* *Euphorbia seleri* <small>Donn.Sm.</small>
* *Euphorbia selloi* <small>(Klotzsch & Garcke ex Klotzsch) Boiss.</small>
* *Euphorbia selousiana* <small>S.Carter</small> (s)
* *Euphorbia semperflorens* <small>L.C.Leach</small> (s)
* *Euphorbia sendaica* <small>Makino</small>
* *Euphorbia senguptae* <small>Balakr. & Subram.</small>
* *Euphorbia senilis* <small>Standl. & Steyerm.</small>
* *Euphorbia sennenii* <small>Pau</small>
* *Euphorbia sennii* <small>Chiov.</small> (s)
* *Euphorbia septemsulcata* <small>Vierh.</small> (s)
* *Euphorbia septentrionalis* <small>P.R.O.Bally & S.Carter</small> (s)
** *Euphorbia septentrionalis* subsp. *gamugofana* <small>M.G.Gilbert</small>
** *Euphorbia septentrionalis* subsp. *septentrionalis*
* *Euphorbia sepulta* <small>P.R.O.Bally & S.Carter</small> (s)
* *Euphorbia seracomans* <small>Bubani</small>
* *Euphorbia serendipita* <small>L.E.Newton</small> (s)
* *Euphorbia seretii* <small>De Wild.</small> (s)
** *Euphorbia seretii* subsp. *seretii*
** *Euphorbia seretii* subsp. *variantissima* <small>L.C.Leach</small>
* *Euphorbia seriocarpa* <small>Hand.-Mazz.</small>
* *Euphorbia serpens* <small>Kunth</small>
* *Euphorbia serpentini* <small>Novak</small>
* *Euphorbia serpyllifolia* <small>Pers.</small>
** *Euphorbia serpyllifolia* subsp. *hirtula* <small>(S.Watson) Oudejans</small>
** *Euphorbia serpyllifolia* subsp. *serpyllifolia*
* *Euphorbia serrata* <small>L.</small> – Serrated spurge, saw-toothed spurge
* *Euphorbia serratifolia* <small>S.Carter</small>
* *Euphorbia serrula* <small>Engelm.</small>
* *Euphorbia sessei* <small>Oudejans</small>
* *Euphorbia sessiliflora* <small>Roxb.</small> (s)
* *Euphorbia sessilifolia* <small>Klotzsch ex Boiss.</small>
* *Euphorbia setiloba* <small>Engelm. ex Torr.</small>
* *Euphorbia setispina* <small>S.Carter</small> (s)
* *Euphorbia sewerzowii* <small>(Herd. ex Prokh.) N.V.Pavlov</small>
* *Euphorbia shaferi* <small>(Millsp.) L.G.Gonzáles & Bisse</small>
* *Euphorbia sharkoensis* <small>Baillon</small>
* *Euphorbia sharmae* <small>U.C.Battach.</small>
* *Euphorbia shebeliensis* <small>(M.G. Gilbert) Bruyns</small> (s) (= *Monadenium shebeliense*)
* *Euphorbia shouanensis* <small>H.Keng</small>
* *Euphorbia sieboldiana* <small>Morr. & Decne.</small>
** *Euphorbia sieboldiana* var. *grandifolia* <small>(Franch. & Sav. ex Hurus.) Oudejans</small>
** *Euphorbia sieboldiana* var. *idzuensis* <small>(Hurus.) Oudejans</small>
** *Euphorbia sieboldiana* var. *ohsumiensis* <small>(Hurus.) Hatus.</small>
** *Euphorbia sieboldiana* var. *peninsularis* <small>(Hurus.) M.Kitagawa</small>
** *Euphorbia sieboldiana* var. *sieboldiana*
** *Euphorbia sieboldiana* var. *sylvatica* <small>(Hurus.) Oudejans</small>
* *Euphorbia sikkimensis* <small>Boiss.</small>
* *Euphorbia silenifolia* <small>(Haw.) Sweet</small> (s)
* *Euphorbia similiramea* <small>S.Carter</small> (s)
* *Euphorbia sinclairiana* <small>Benth.</small> (s) (= *Euphorbia elata*)
* *Euphorbia sintenisii* <small>Boiss. ex J.Freyn</small>
* *Euphorbia sipolisii* <small>N.E.Br.</small> (s)
* *Euphorbia skottsbergii* <small>Sherff</small>
* *Euphorbia smallii* <small>Oudejans</small>
* *Euphorbia smirnovii* <small>Geltman</small>
* *Euphorbia smithii* <small>S.Carter</small> (s)
* *Euphorbia socotrana* <small>Balf.f.</small> (s)
* *Euphorbia sogdiana* <small>Popov</small>
* *Euphorbia sojakii* <small>(Chrtek & Křísa) Dubovik ex Dubovik et al.</small>
* *Euphorbia somalensis* <small>Pax</small> (s)
* *Euphorbia songweana* <small>S.Carter</small> (s)
* *Euphorbia sonorae* <small>Rose</small>
* *Euphorbia soobyi* <small>McVaugh</small>
* *Euphorbia soongarica* <small>Boiss.</small>
* *Euphorbia sororia* <small>Schrenk</small>
* *Euphorbia sparrmanii* <small>Boiss.</small> (= *Euphorbia ramosissima* <small>Hook. & Arn. *non* Loiseleur (nom. illeg.)</small>, *Chamaesyce sparrmanii* <small>(Boissier) Hurusawa</small>)
* *Euphorbia sparsiflora* <small>A.Heller</small>
* *Euphorbia sparsiglandulosa* <small>J.Ponert</small>
* *Euphorbia spartaria* <small>N.E.Br.</small> (s)
* *Euphorbia spartiformis* <small>Mobayen</small>
* *Euphorbia spathulata* <small>Lam.</small> – Roughpod spurge, warty spurge
** *Euphorbia spathulata* var. *mexicana* <small>(Engelm.) Oudejans</small>
** *Euphorbia spathulata* var. *spathulata*
* *Euphorbia spathulifolia* <small>(Haw.) Steud.</small>
* *Euphorbia speciosa* <small>L.C.Leach</small> (s)
* *Euphorbia specksii* <small>Rauh</small> (s)
* *Euphorbia spectabilis* <small>(S.Carter) Bruyns</small> (s) (= *Monadenium spectabile*)
* *Euphorbia sphaerorrhiza* <small>Benth.</small> (s)
* *Euphorbia spicata* <small>E.Mey. ex Boiss.</small> (s)
* *Euphorbia spinea* <small>N.E.Br.</small> (s)
* *Euphorbia spinidens* <small>(Bornm. ex Prokh.) Prokh.</small>
* *Euphorbia spinosa* <small>L.</small> (s)
** *Euphorbia spinosa* subsp. *ligustica* <small>(Fiori) Pignatti</small>
** *Euphorbia spinosa* subsp. *spinosa*
* *Euphorbia spinulosa* <small>(S.Carter) Bruyns</small> (s) (= *Monadenium spinulosum*)
* *Euphorbia spiralis* <small>Balf.f.</small> (s)
* *Euphorbia spissiflora* <small>S.Carter</small>
* *Euphorbia spruceana* <small>Boiss.</small>
* *Euphorbia squamigera* <small>Loisel.</small> (s)
* *Euphorbia squamosa* <small>Willd.</small>
** *Euphorbia squamosa* var. *serrata* <small>(Boiss.) Oudejans</small>
** *Euphorbia squamosa* var. *squamosa*
** *Euphorbia squamosa* var. *talyschensis* <small>(Boiss. & Buhse) Oudejans</small>
** *Euphorbia squamosa* var. *wilhelmsiana* <small>(K.Koch) Oudejans</small>
* *Euphorbia squarrosa* <small>Haw.</small>
* *Euphorbia standleyi* <small>(Millsp.) Oudejans</small>
* *Euphorbia stapelioides* <small>Boiss.</small> (s)
* *Euphorbia stapfii* <small>A.Berger</small> (s)
* *Euphorbia stellata* <small>Willd.</small> (s)
* *Euphorbia stellispina* <small>(Haw.)</small> (s)
** *Euphorbia stellispina* var. *astrispina* <small>(N.E.Br.) A.C.White, R.A.Dyer & B.Sloane</small>
** *Euphorbia stellispina* var. *stellispina*
* *Euphorbia stenocaulis* <small>Bruyns</small> (s)
* *Euphorbia stenoclada* <small>Baillon</small> (s)
** *Euphorbia stenoclada* subsp. *ambatofinandranae* <small>(Leandri) Cremers</small>
** *Euphorbia stenoclada* subsp. *stenoclada*
* *Euphorbia stenophylla* <small>(Klotzsch & Garcke ex Klotzsch) Boiss.</small>
* *Euphorbia stepposa* <small>Zoz ex Prokh.</small>
* *Euphorbia stevenii* <small>F.M.Bailey</small> (s)
* *Euphorbia steyermarkii* <small>Standl. ex Standl. & Steyerm.</small>
* *Euphorbia strictospora* <small>Engelm.</small>
* *Euphorbia stoddartii* <small>Frosberg</small>
* *Euphorbia stolonifera* <small>Marloth ex A.C.White, R.A.Dyer & B.Sloane</small> (s)
* *Euphorbia stracheyi* <small>Boiss.</small>
* *Euphorbia strangulata* <small>N.E.Br.</small> (s)
** *Euphorbia strangulata* subsp. *deminuens* <small>L.C.Leach</small>
** *Euphorbia strangulata* subsp. *strangulata*
* *Euphorbia striata* <small>Thunb.</small> (s)
* *Euphorbia stricta* <small>L.</small>
* *Euphorbia strictior* <small>Holz.</small> – Panhandle spurge
* *Euphorbia strigosa* <small>Hook. & Arn.</small> (s)
* *Euphorbia stygiana* <small>H.C.Watson</small> (s)
** *Euphorbia stygiana* subsp. *santamariae* <small>H.Schäf.</small>
** *Euphorbia stygiana* subsp. *stygiana*
* *Euphorbia subcordata* <small>C.A.Mey. ex Ledeb.</small>
* *Euphorbia subhastifolia* <small>Klokov ex Dubovik & Klokov</small>
* *Euphorbia submammillaris* <small>(A.Berger) A.Berger</small> (s)
* *Euphorbia subpeltata* <small>S.Watson</small>
* *Euphorbia subpeltatophylla* <small>Rauh</small> (s)
* *Euphorbia subreniformis* <small>S.Watson</small>
* *Euphorbia subsalsa* <small>Hiern</small> (s)
** *Euphorbia subsalsa* subsp. *fluvialis* <small>L.C.Leach</small>
** *Euphorbia subsalsa* subsp. *subsalsa*
* *Euphorbia subscandens* <small>P.R.O.Bally & S.Carter</small> (s)
* *Euphorbia subterminalis* <small>N.E.Br.</small>
* *Euphorbia subtrifoliata* <small>Rusby</small>
* *Euphorbia subulatifolia* <small>Hurus.</small>
* *Euphorbia succedanea* <small>L.C.Wheeler</small>
* *Euphorbia sudanica* <small>A.Chev.</small> (s)
* *Euphorbia suffulta* <small>P.Bruyns</small> (s)
* *Euphorbia sulcata* <small>De Lens ex Loisel.</small>
** *Euphorbia sulcata* subsp. *maroccana* <small>Molero, Rovira & J.Vicens.</small>
** *Euphorbia sulcata* subsp. *sulcata*
* *Euphorbia sultan-hassei* <small>Strid, B.Bentzer, R.von Bothmer, L.Engstrand & M.Gustafsson</small> (s)
* *Euphorbia sumati* <small>S.Carter</small> (s)
* *Euphorbia sumbawensis* <small>Boiss.</small>
* *Euphorbia superans* <small>Nel</small> (s)
* *Euphorbia suppressa* <small>Marx</small> (s)
* *Euphorbia surinamensis* <small>Lanj.</small>
* *Euphorbia susanholmesiae* <small>Binojk. & Gopalan</small> (s)
* *Euphorbia susannae* <small>Marloth</small> (s) – Suzanne's spurge
* *Euphorbia suzannaemarnierae* <small>Rauh & Pétignat</small> (s)
* *Euphorbia synadenium* <small>Ridl.</small> (s)
* *Euphorbia syncalycina* <small>Bruyns</small> (s) (= *Synadenium calycinum*)
* *Euphorbia syncameronii* <small>Bruyns</small> (s) (= *Synadenium cameronii*)
* *Euphorbia systyla* <small>Edgew.</small>
* *Euphorbia systyloides* <small>Pax</small>
** *Euphorbia systyloides* subsp. *porcaticapsa* <small>S.Carter</small>
** *Euphorbia systyloides* subsp. *systyloides*
* *Euphorbia szechuanica* <small>Pax & K.Hoffmann</small>
* *Euphorbia szovitsii* <small>Fisch. & C.A.Mey.</small>

== T ==

* *Euphorbia taboraensis* <small>A.Hässl.</small> (s)
* *Euphorbia tacnensis* <small>Phil.</small>
* *Euphorbia taihsiensis* <small>(Chaw & Koutnik) Oudejans</small>
* *Euphorbia taitensis* <small>Boiss.</small>
* *Euphorbia taiwaniana* <small>S.S.Ying</small>
* *Euphorbia talaina* <small>Radcl.-Sm.</small>
* *Euphorbia talastavica* <small>(Prokh.) Prokh.</small>
* *Euphorbia taluticola* <small>Wiggins</small>
* *Euphorbia tamanduana* <small>Boiss.</small>
* *Euphorbia tamaulipasana* <small>(Millsp.) Oudejans</small>
* *Euphorbia tanaensis* (s)
* *Euphorbia tanaitica* <small>Paczoski</small>
* *Euphorbia tannensis* <small>Spreng.</small> (s)
** *Euphorbia tannensis* subsp. *eremophila* <small>(A.Cunn.) D.C.Hassall</small>
** *Euphorbia tannensis* subsp. *tannensis*
* *Euphorbia tanquahuete* <small>Sessé & Moc.</small> (s)
* *Euphorbia tarapacana* <small>Phil.</small>
* *Euphorbia tardieuana* (s)
* *Euphorbia tarokoensis* <small>Hayata</small>
* *Euphorbia taruensis* <small>S.Carter</small> (s)
* *Euphorbia tashiroi* <small>Hayata</small>
* *Euphorbia tauricola* <small>Prokh.</small>
* *Euphorbia taurinensis* <small>All.</small>
** *Euphorbia taurinensis* var. *brachyceras* <small>(P.Candargy) Oudejans</small>
** *Euphorbia taurinensis* var. *isophylla* <small>(K.Malý) Oudejans</small>
** *Euphorbia taurinensis var. taurinensis*
* *Euphorbia taxifolia* <small>Burm.f.</small>
* *Euphorbia tchenngoi* <small>(Soják) Radcl.-Sm.</small>
* *Euphorbia teheranica* <small>Boiss.</small>
* *Euphorbia tehuacana* <small>(Millsp.) & V.W.Steinm.</small> (= *Pedilanthus tehuacanus*) (s)
* *Euphorbia teixeirae* <small>L.C.Leach</small> (s)
* *Euphorbia teke* <small>Pax</small> (s)
* *Euphorbia telephioides* <small>Chapm.</small> – Telephus spurge
* *Euphorbia tenax* <small>W.J.Burchell</small> (s)
* *Euphorbia tenera* <small>S.Watson</small>
* *Euphorbia tenuirama* <small>Schweinf. ex A.Berger</small> (s)
* *Euphorbia tenuispinosa* <small>Gilli</small> (s)
** *Euphorbia tenuispinosa* var. *robusta* <small>P.R.O.Bally & S.Carter</small>
** *Euphorbia tenuispinosa* var. *tenuispinosa*
* *Euphorbia terracina* <small>L.</small> – Geraldton carnation weed
** *Euphorbia terracina* var. *alexandrina* <small>(Delile) Z.El-Karemy</small>
** *Euphorbia terracina* var. *terracina*
* *Euphorbia tescorum* <small>S.Carter</small> (s)
* *Euphorbia teskensuensis* <small>A.O.Orazova</small>
* *Euphorbia tessmannii* <small>Mansf.</small>
* *Euphorbia tetracantha* <small>Rendle</small> (s)
* *Euphorbia tetracanthoides* <small>Pax</small> (s)
* *Euphorbia tetragona* <small>Haw.</small> (s)
* *Euphorbia tetrapora* <small>Engelm.</small> – Weak spurge
* *Euphorbia tetraptera*
* *Euphorbia tettensis* <small>Klotzsch</small>
* *Euphorbia tetuanensis* <small>Pau</small>
* *Euphorbia texana* <small>Boiss.</small> – Texas spurge
* *Euphorbia therica* <small>L.C.Wheeler</small>
* *Euphorbia thinophila* <small>Phil.</small> (s)
* *Euphorbia tholicola* <small>L.C.Leach</small> (s)
* *Euphorbia thompsonii* <small>Holmboe</small>
* *Euphorbia thomsoniana* <small>Boiss.</small>
* *Euphorbia thouarsiana* (s)
* *Euphorbia thulinii* (s)
* *Euphorbia thymifolia* <small>L.</small> (= *Chamaesyce thymifolia*)
* *Euphorbia thyrsoidea* <small>Boiss.</small>
* *Euphorbia tianshanica* <small>Prokh. & Popov</small>
* *Euphorbia tibetica* <small>Boiss.</small>
* *Euphorbia tinianensis* <small>Hosok.</small>
* *Euphorbia tirucalli* – Indian tree spurge, milk bush, pencil tree (s)
* *Euphorbia tisserantii* <small>A.Chev. R.Sillans ex A.Chev.</small>
* *Euphorbia tithymaloides* <small>L.</small> (= *Pedilanthus tithymaloides*) (s)
** *Euphorbia tithymaloides* subsp. *angustifolia* <small>(Poit.) V.W.Steinm.</small> (= *Pedilanthus tithymaloides* subsp. *angustifolius*)
** *Euphorbia tithymaloides* subsp. *bahamensis* <small>(Millsp.) V.W.Steinm.</small> (= *Pedilanthus tithymaloides* subsp. *bahamensis*)
** *Euphorbia tithymaloides* subsp. *jamaicensis* <small>(Millsp. & Britton) V.W.Steinm.</small> (= *Pedilanthus tithymaloides* subsp. *jamaicensis*)
** *Euphorbia tithymaloides* subsp. *padifolia* <small>(L.) V.W.Steinm.</small> (= *Pedilanthus tithymaloides* subsp. *padifolius*)
** *Euphorbia tithymaloides* subsp. *parasitica* <small>(Klotzsch. & Garcke) V.W.Steinm.</small> (= *Pedilanthus tithymaloides* subsp. *parasiticus*)
** *Euphorbia tithymaloides* subsp. *retusa* <small>(Benth.) V.W.Steinm.</small> (= *Pedilanthus tithymaloides* subsp. *retusus*)
** *Euphorbia tithymaloides* subsp. *smallii* <small>(Millsp.) V.W.Steinm.</small> (= *Pedilanthus tithymaloides* subsp. *smallii*)
** *Euphorbia tithymaloides* subsp. *tithymaloides* (= *Pedilanthus tithymaloides* subsp. *tithymaloides*)
* *Euphorbia tlapanensis* <small>Hargreaves</small>
* *Euphorbia togakusensis* <small>Hayata</small>
* *Euphorbia tomentella* <small>Engelm. ex Boiss.</small>
* *Euphorbia tomentulosa* <small>S.Watson</small> (s)
* *Euphorbia torralbasii* <small>Urb.</small>
* *Euphorbia torrei* <small>(L.C.Leach) Bruyns</small> (= *Monadenium torrei*) (s)
* *Euphorbia torta* <small>Pax & K.Hoffmann</small> (s)
* *Euphorbia tortilis* <small>Rottler ex W.Ainslie</small> (s)
* *Euphorbia tortirama* <small>R.A.Dyer</small> (s)
* *Euphorbia tortistyla* <small>N.E.Br.</small> (s)
* *Euphorbia tozzii* <small>Chiov.</small>
* *Euphorbia trachysperma* <small>Engelm.</small>
* *Euphorbia trancapatae* <small>(Croizat) J.F.Macbr.</small>
* *Euphorbia transoxana* <small>(Prokh.) Prokh.</small>
* *Euphorbia transtagana* <small>Boiss.</small>
* *Euphorbia transvaalensis* <small>Schltr.</small> (s)
* *Euphorbia tranzschelii* <small>(Prokh.) Prokh.</small>
* *Euphorbia triangolensis* <small>Bruyns</small> (= *Synadenium angolense*) (s)
* *Euphorbia triaculeata* <small>Forssk.</small> (s)
* *Euphorbia trialata* <small>(Huft) V.W.Steinm.</small>
* *Euphorbia triangularis* <small>Desf. ex A.Berger</small> (s)
* *Euphorbia trichadenia* <small>Pax</small> (s)
** *Euphorbia trichadenia* var. *gibbsiae* <small>N.E.Br.</small>
** *Euphorbia trichadenia* var. *trichadenia*
* *Euphorbia trichiocyma* <small>S.Carter</small>
* *Euphorbia trichocardia* <small>L.B.Sm.</small>
* *Euphorbia trichophylla* Baker
* *Euphorbia trichotoma* <small>Kunth</small>
* *Euphorbia tricolor* <small>Greenm.</small>
* *Euphorbia tridentata* <small>Lam.</small> (s)
* *Euphorbia triflora* <small>Schott, Nyman & Kotschy</small>
* *Euphorbia trigona* <small>Mill.</small> (s)
* *Euphorbia triloba* <small>Sessé & Moc.</small>
* *Euphorbia trinervia* <small>Schumach.</small>
* *Euphorbia triodonta* <small>(Prokh.) Prokh.</small>
* *Euphorbia tripartita* <small>S.Carter</small> (s)
* *Euphorbia triphylla* <small>(Klotzsch & Garcke ex Klotzsch) Oudejans</small>
* *Euphorbia troyana* <small>Urb.</small>
* *Euphorbia tshuiensis* <small>(Prokh.) Sergievsk. ex Krylov</small>
* *Euphorbia tsimbazazae* <small>Leandri</small>
* *Euphorbia tuberculata* <small>Jacq.</small> (s)
** *Euphorbia tuberculata* var. *macowanii* <small>A.C.White, R.A.Dyer & B.Sloane</small>
** *Euphorbia tuberculata* var. *tuberculata*
* *Euphorbia tuberculatoides* <small>N.E.Br.</small> (s)
* *Euphorbia tuberifera* <small>N.E.Br.</small> (s)
* *Euphorbia tuberosa* <small>L.</small> (s)
* *Euphorbia tubiglans* <small>Marloth ex. R.A.Dyer</small> (s)
* *Euphorbia tuckeyana* <small>Steud. ex P.B.Webb</small> (s)
* *Euphorbia tuerckheimii* <small>Urb.</small>
* *Euphorbia tugelensis* <small>N.E.Br.</small> (s)
* *Euphorbia tulearensis* (s)
* *Euphorbia tumbaensis* <small>De Wild.</small>
* *Euphorbia tumistyla* <small>(D.G.Burch) Radcl.-Sm.</small>
* *Euphorbia tunetana* <small>(Murbeck) Vierh. ex F.Buxbaum</small>
* *Euphorbia turbiniformis* <small>Chiov.</small> (s)
* *Euphorbia turczaninowii* <small>Kar. & Kir.</small>
* *Euphorbia turkanensis* <small>S.Carter</small> (s)
* *Euphorbia turkestanica* <small>Regel</small>
* *Euphorbia turpinii* <small>Boiss.</small>
* *Euphorbia tyraica* <small>Klokov & Artemcz. ex Klokov</small>

== U ==

* *Euphorbia ugandensis* <small>Pax & K.Hoffmann ex Pax</small>
* *Euphorbia uhligiana* <small>Pax</small> (s)
* *Euphorbia uliginosa* <small>Welw. ex Boiss.</small>;
* *Euphorbia umbellulata* <small>Engelm. ex Boiss.</small>
* *Euphorbia umbonata* <small>S.Carter</small> (s)
* *Euphorbia umbraculiformis* <small>Rauh</small> (s)
* *Euphorbia umbrosa* <small>Bert. ex Spreng.</small>
* *Euphorbia umfoloziensis* <small>R.G.Peckover</small> (s)
* *Euphorbia undulata* <small>M.Bieb.</small>
* *Euphorbia undulatifolia* <small>Janse</small> (s)
* *Euphorbia unicornis* <small>R.A.Dyer</small> (s)
* *Euphorbia uniglandulosa* <small>S.Watson</small>
* *Euphorbia uniglans* <small>M.G.Gilbert</small> (s)
* *Euphorbia unispina* <small>N.E.Br.</small> (s)
* *Euphorbia uralensis* <small>Fisch. ex Link</small>
* *Euphorbia urbanii* <small>(Millsp.) Oudejans</small>
* *Euphorbia urceolophora* <small>Parodi</small>
* *Euphorbia usambarica* <small>Pax</small> (s)
** *Euphorbia usambarica subsp. elliptica* <small>Pax</small> (s)
** *Euphorbia usambarica subsp. usambarica* (s)
* *Euphorbia uzmuk* <small>S.Carter & J.R.I.Wood</small> (s)

== V ==

* *Euphorbia vaalputsiana* <small>L.C.Leach</small> (s)
* *Euphorbia vachellii* <small>Hook. & Arn.</small>
* *Euphorbia vaginulata* <small>Griseb</small> (s)
* *Euphorbia vajravelui* <small>Binojk. & N.P.Balakr.</small> (s)
* *Euphorbia valerianifolia* <small>Lam.</small>
* *Euphorbia valerii* <small>Standl.</small>
* *Euphorbia vallaris* <small>L.C.Leach</small> (s)
* *Euphorbia valliniana* <small>Belli</small>
* *Euphorbia vallismortuae* <small>(Millsp.) Howell</small>
* *Euphorbia vandermerwei* <small>R.A.Dyer</small> (s)
* *Euphorbia variabilis* <small>Ces.</small>
* *Euphorbia vauthieriana* <small>Boiss.</small>
* *Euphorbia vedica* <small>S.Ter-Chatschat.</small>
* *Euphorbia velleriflora* <small>(Klotzsch & Garcke ex Klotzsch) Boiss.</small>
* *Euphorbia velligera* <small>S.Schauer ex Nees & S.Schauer</small>
* *Euphorbia venenata* <small>Marloth</small> (s)
* *Euphorbia venenifica* <small>Kotschy ex Boiss.</small> (s)
* *Euphorbia veneris* <small>M.S.Khan</small>
* *Euphorbia veneta* <small>Willd.</small>
* *Euphorbia venteri* <small>L.C.Leach ex R.H.Archer & S.Carter</small> (s)
* *Euphorbia verapazensis* <small>Standl. & Steyerm.</small> (s)
* *Euphorbia vermiculata* <small>Raf.</small>
* *Euphorbia verrucosa* <small>L.</small>
* *Euphorbia verruculosa* <small>N.E.Br.</small> (s)
* *Euphorbia versicolores* <small>G.Will.</small> (s)
* *Euphorbia vervoorstii* <small>Subils</small>
* *Euphorbia vestita* <small>Boiss.</small>
* *Euphorbia vezorum* <small>Leandri</small>
* *Euphorbia viatilis* <small>Ule</small>
* *Euphorbia viduiflora* <small>L.C.Leach</small> (s)
* *Euphorbia viguieri* <small>Denis</small> (s)
** *Euphorbia viguieri* var. *ankarafantsiensis* <small>Ursch & Leandri</small>
** *Euphorbia viguieri* var. *capuroniana* <small>Ursch & Leandri</small>
** *Euphorbia viguieri* var. *tsimbazazae* <small>Ursch & Leandri</small>
** *Euphorbia viguieri* var. *viguieri*
** *Euphorbia viguieri* var. *vilanandrensis* <small>Ursch & Leandri</small>
* *Euphorbia villifera* <small>Scheele</small>
* *Euphorbia villosa* <small>Waldst. & Kit. ex Willd.</small>
** *Euphorbia villosa* subsp. *semivillosa* <small>(Prokh.) Oudejans</small>
** *Euphorbia villosa* subsp. *valdevillosocarpa* <small>(Arvat. & Nyar.) R.Turner</small>
** *Euphorbia villosa* subsp. *villosa*
* *Euphorbia viminea* <small>Hook.f.</small>
* *Euphorbia violacea* <small>Greenm.</small>
* *Euphorbia virgata* <small>Waldst. & Kit.</small>
* *Euphorbia viridis* <small>(Klotzsch & Garcke ex Klotzsch) Boiss.</small>
* *Euphorbia viridula* <small>Cordemoy ex Radcl.-Sm.</small>
* *Euphorbia virosa* <small>Willd.</small> (s)
** *Euphorbia virosa* subsp. *arenicola* <small>L.C.Leach</small>
** *Euphorbia virosa* subsp. *virosa*
* *Euphorbia viscoides* <small>Boiss.</small>
* *Euphorbia vittata* <small>S.Carter</small> (s)
* *Euphorbia volgensis* <small>Kryshtof.</small>
* *Euphorbia volhynica* <small>Besser ex M.Raciborski</small>
* *Euphorbia volkii* <small>Rech.f.</small>
* *Euphorbia volkmanniae* <small>Dinter</small> (s)
* *Euphorbia vulcanorum* <small>S.Carter</small> (s)

== W ==

* *Euphorbia wakefieldii* <small>N.E.Br.</small> (s)
* *Euphorbia waldsteinii* <small>(Soják) Radcl.-Sm.</small>
** *Euphorbia waldsteinii var. jaxartica* <small>(Prokh.) Oudejans</small>
** *Euphorbia waldsteinii var. orientalis* <small>(Boiss.) Oudejans</small>
** *Euphorbia waldsteinii var. saratoi* <small>(Ardoino) Oudejans</small>
** *Euphorbia waldsteinii var. waldsteinii*
* *Euphorbia wallichii* <small>Hook.f.</small>
* *Euphorbia wangii* <small>Oudejans</small>
* *Euphorbia waringiae* <small>Rauh & R.Gerold</small> (s)
* *Euphorbia waterbergensis* <small>R.A.Dyer</small> (s)
* *Euphorbia weberbaueri* <small>R.Mansfeld</small> (s)
* *Euphorbia wellbyi* <small>N.E.Br.</small>
* *Euphorbia wellbyi var. wellbyi*
* *Euphorbia wellbyi var. glabra* <small>S.Carter</small>
* *Euphorbia welwitschii* <small>Boiss. & Reut.</small>
* *Euphorbia wheeleri* <small>Baillon</small>
* *Euphorbia whellanii* <small>L.C.Leach</small> (s)
* *Euphorbia whyteana* <small>Baker f.</small>
* *Euphorbia wildii* <small>L.C.Leach</small> (s)
* *Euphorbia williamsonii* <small>L.C.Leach</small> (s)
* *Euphorbia wilmaniae* <small>Marloth</small> (s)
* *Euphorbia wilsonii* <small>(Millsp.) Correll</small>
* *Euphorbia wittmannii* <small>Boiss.</small>
* *Euphorbia woodii* <small>N.E.Br.</small> (s)
* *Euphorbia wootonii* <small>Oudejans</small>
* *Euphorbia woronowii* <small>Grossh.</small>
* *Euphorbia wrightii* <small>Torr. & A.Gray</small> (s) 

== X ==

* *Euphorbia xalapensis* <small>Kunth</small>
* *Euphorbia xanti* <small>Engelm. ex Boiss.</small> (s)
* *Euphorbia xbacensis* <small>Millsp.</small>
* *Euphorbia xeropoda* <small>Brandegee</small>
* *Euphorbia xylacantha* <small>Pax</small> (s)
* *Euphorbia xylopoda* <small>Greenm.</small>

== Y ==

* *Euphorbia yadgirensis* <small>Sarojin & Raja Kullayisw</small>
* *Euphorbia yamashitae* <small>Kitam.</small>
* *Euphorbia yajinensis* <small>W.T.Wang</small>
* *Euphorbia yaroslavii* <small>P.P.Poljakov</small>
* *Euphorbia yattana* <small>(P.R.O.Bally) Bruyns</small> (s) (= *Monadenium yattanum*)
* *Euphorbia yayalesia* <small>Urb.</small>
* *Euphorbia yemenica* <small>Boiss.</small>
* *Euphorbia yinshanica* <small>S.Q.Zhou</small>
* *Euphorbia yucatanensis* <small>(Millsp.) Standl.</small>

== Z ==

* *Euphorbia zakamenae* <small>Leandri</small> (s)
* *Euphorbia zambesiana* <small>Benth.</small> (s)
** *Euphorbia zambesiana var. benguelensis* <small>(Pax) N.E.Br.</small> (s)
** *Euphorbia zambesiana var. zambesiana* (s)
* *Euphorbia zeylana* <small>N.E.Br.</small>
* *Euphorbia zierioides* <small>Boiss.</small>
* *Euphorbia zornioides* <small>Boiss.</small>
* *Euphorbia zoutpansbergensis* <small>R.A.Dyer</small> (s)

== Jereo koa ==

* *Euphorbia*
* *Chamaesyce*
* *Elaeophorbia*
* *Endadenium*
* *Monadenium*
* *Synadenium*
* *Pedilanthus* 

* *Euphorbiaceae''