Every accepted species in the genus is listed. A name links to its page when we hold at least three commercially licensed photographs of it. Where we do not, the row shows how many we actually found, which is usually none.
| Species | Authority | Usable photographs | Page |
|---|---|---|---|
| Asclepias syriaca | L. | 8,451 | documented |
| Asclepias tuberosa | L. | 2,641 | documented |
| Asclepias incarnata | L. | 2,033 | documented |
| Asclepias speciosa | Torr. | 1,935 | documented |
| Asclepias viridis | Walter | 1,840 | documented |
| Asclepias oenotheroides | Schltdl. & Cham. | 1,576 | documented |
| Asclepias curassavica | L. | 1,350 | documented |
| Asclepias fascicularis | Decne. | 1,209 | documented |
| Asclepias viridiflora | Raf. | 1,081 | documented |
| Asclepias asperula | (Decne.) Woodson | 1,024 | documented |
| Asclepias verticillata | L. | 960 | documented |
| Asclepias exaltata | L. | 653 | documented |
| Asclepias variegata | L. | 547 | documented |
| Asclepias eriocarpa | Benth. | 513 | documented |
| Asclepias amplexicaulis | Sm. | 421 | documented |
| Asclepias quadrifolia | Jacq. | 397 | documented |
| Asclepias subulata | Decne. | 396 | documented |
| Asclepias subverticillata | (A.Gray) Vail | 384 | documented |
| Asclepias humistrata | Walter | 372 | documented |
| Asclepias latifolia | (Torr.) Raf. | 341 | documented |
| Asclepias lanceolata | Walter | 320 | documented |
| Asclepias perennis | Walter | 299 | documented |
| Asclepias cordifolia | (Benth.) Jeps. | 289 | documented |
| Asclepias albicans | S.Watson | 269 | documented |
| Asclepias linaria | Cav. | 267 | documented |
| Asclepias tomentosa | Elliott | 227 | documented |
| Asclepias pedicellata | Walter | 213 | documented |
| Asclepias purpurascens | L. | 204 | documented |
| Asclepias sullivantii | Engelm. ex A.Gray | 201 | documented |
| Asclepias hirtella | (Pennell) Woodson | 181 | documented |
| Asclepias californica | Greene | 173 | documented |
| Asclepias erosa | Torr. | 168 | documented |
| Asclepias longifolia | Michx. | 151 | documented |
| Asclepias ovalifolia | Decne. | 150 | documented |
| Asclepias texana | A.Heller | 139 | documented |
| Asclepias obovata | Elliott | 135 | documented |
| Asclepias michauxii | Decne. | 128 | documented |
| Asclepias stenophylla | A.Gray | 119 | documented |
| Asclepias feayi | Chapm. ex A.Gray | 118 | documented |
| Asclepias brachystephana | Engelm. ex Torr. | 103 | documented |
| Asclepias rubra | L. | 103 | documented |
| Asclepias arenaria | Torr. | 98 | documented |
| Asclepias engelmanniana | Woodson | 94 | documented |
| Asclepias pumila | (A.Gray) Vail | 91 | documented |
| Asclepias albens | (E.Mey.) Schltr. | 81 | documented |
| Asclepias curtissii | A.Gray | 75 | documented |
| Asclepias cinerea | Walter | 71 | documented |
| Asclepias mellodora | A.St.-Hil. | 71 | documented |
| Asclepias prostrata | W.H.Blackw. | 68 | documented |
| Asclepias involucrata | Engelm. ex Torr. | 66 | documented |
| Asclepias linearis | Scheele | 64 | documented |
| Asclepias angustifolia | Schweigg. | 57 | documented |
| Asclepias nummularia | Torr. | 50 | documented |
| Asclepias solanoana | Woodson | 48 | documented |
| Asclepias crispa | P.J.Bergius | 46 | documented |
| Asclepias glaucescens | Kunth | 45 | documented |
| Asclepias aurea | (Schltr.) Schltr. | 42 | documented |
| Asclepias depressa | (Schltr.) Schltr. | 42 | documented |
| Asclepias nyctaginifolia | A.Gray | 37 | documented |
| Asclepias vestita | Hook. & Arn. | 37 | documented |
| Asclepias flexuosa | (E.Mey. ex Decne.) Schltr. | 36 | documented |
| Asclepias stellifera | Schltr. | 36 | documented |
| Asclepias nivea | L. | 34 | documented |
| Asclepias similis | Hemsl. | 34 | documented |
| Asclepias connivens | Baldwin ex Elliott | 33 | documented |
| Asclepias elata | Benth. | 33 | documented |
| Asclepias meadii | Torr. ex A.Gray | 32 | documented |
| Asclepias tonkawae | D.P.Duran, J.Ksepka, S.A.Davis, Godwin & R.A.S.Laroche | 31 | documented |
| Asclepias macropus | (Schltr.) Schltr. | 30 | documented |
| Asclepias fournieri | Woodson | 25 | documented |
| Asclepias pellucida | E.Fourn. | 25 | documented |
| Asclepias eminens | (Harv.) Schltr. | 24 | documented |
| Asclepias hypoleuca | (A.Gray) Woodson | 24 | documented |
| Asclepias cultriformis | Harv. ex Schltr. | 23 | documented |
| Asclepias welshii | N.H.Holmgren & P.K.Holmgren | 23 | documented |
| Asclepias lemmonii | A.Gray | 19 | documented |
| Asclepias otarioides | E.Fourn. | 19 | documented |
| Asclepias viridula | Chapm. | 19 | documented |
| Asclepias cucullata | (Schltr.) Schltr. | 18 | documented |
| Asclepias emoryi | (Greene) Vail | 17 | documented |
| Asclepias fulva | N.E.Br. | 17 | documented |
| Asclepias labriformis | M.E.Jones | 17 | documented |
| Asclepias gibba | (E.Mey.) Schltr. | 16 | documented |
| Asclepias hallii | A.Gray | 15 | documented |
| Asclepias senecionifolia | M.E.Jones | 15 | documented |
| Asclepias pratensis | Benth. | 14 | documented |
| Asclepias cryptoceras | S.Watson | 13 | documented |
| Asclepias melantha | Decne. | 13 | documented |
| Asclepias oreophila | Nicholas ex Hilliard & B.L.Burtt | 13 | documented |
| Asclepias rusbyi | (Vail) Woodson | 12 | documented |
| Asclepias brevicuspis | (E.Mey.) Schltr. | 11 | documented |
| Asclepias navicularis | (E.Mey.) Schltr. | 11 | documented |
| Asclepias fallax | (Schltr.) Schltr. | 10 | documented |
| Asclepias humilis | (E.Mey.) Schltr. | 10 | documented |
| Asclepias mexicana | Cav. | 7 | documented |
| Asclepias sauronii | M.G.Chávez & L.O.Alvarado | 7 | documented |
| Asclepias candida | Vell. | 6 | documented |
| Asclepias expansa | (E.Mey.) Schltr. | 6 | documented |
| Asclepias meliodora | (Schltr.) Schltr. | 6 | documented |
| Asclepias pringlei | (Greenm.) Woodson | 6 | documented |
| Asclepias vicaria | N.E.Br. | 6 | documented |
| Asclepias virletii | E.Fourn. | 6 | documented |
| Asclepias zanthodacryon | (L.B.Sm.) Woodson | 6 | documented |
| Asclepias brevipes | (Schltr.) Schltr. | 5 | documented |
| Asclepias eastwoodiana | Barneby | 5 | documented |
| Asclepias lanuginosa | Nutt. | 5 | documented |
| Asclepias circinalis | (Decne.) Woodson | 4 | documented |
| Asclepias gordaensis | L.O.Alvarado & S.Islas | 4 | documented |
| Asclepias macrotis | Torr. | 4 | documented |
| Asclepias mirifica | Woodson | 4 | documented |
| Asclepias adscendens | (Schltr.) Schltr. | 3 | documented |
| Asclepias scaposa | Vail | 3 | documented |
| Asclepias subaphylla | Woodson | 3 | documented |
| Asclepias scheryi | Woodson | 10 | below the evidence gate |
| Asclepias jaliscana | B.L.Rob. | 6 | below the evidence gate |
| Asclepias quinquedentata | A.Gray | 3 | below the evidence gate |
| Asclepias auriculata | Kunth | 2 | below the evidence gate |
| Asclepias densiflora | N.E.Br. | 2 | below the evidence gate |
| Asclepias graogramanii | L.O.Alvarado, M.G.Chávez & J.A.Álvarez | 2 | below the evidence gate |
| Asclepias leptopus | I.M.Johnst. | 2 | below the evidence gate |
| Asclepias montevaga | M.Glen, Nicholas & Bester | 2 | below the evidence gate |
| Asclepias ovata | M.Martens & Galeotti | 2 | below the evidence gate |
| Asclepias praemorsa | Schltr. | 2 | below the evidence gate |
| Asclepias ruthiae | Maguire | 2 | below the evidence gate |
| Asclepias sanjuanensis | K.D.Heil, J.M.Porter & S.L.Welsh | 2 | below the evidence gate |
| Asclepias uncialis | Greene | 2 | below the evidence gate |
| Asclepias barjoniifolia | E.Fourn. | 1 | below the evidence gate |
| Asclepias alpestris | (K.Schum.) Goyder | 0 | below the evidence gate |
| Asclepias amabilis | N.E.Br. | 0 | below the evidence gate |
| Asclepias ameliae | S.Moore | 0 | below the evidence gate |
| Asclepias apocynifolia | Woodson | 0 | below the evidence gate |
| Asclepias atroviolacea | Woodson | 0 | below the evidence gate |
| Asclepias bartlettiana | Woodson | 0 | below the evidence gate |
| Asclepias baumii | Schltr. | 0 | below the evidence gate |
| Asclepias bicuspis | N.E.Br. | 0 | below the evidence gate |
| Asclepias bifida | W.H.Blackw. | 0 | below the evidence gate |
| Asclepias boliviensis | E.Fourn. | 0 | below the evidence gate |
| Asclepias bracteolata | E.Fourn. | 0 | below the evidence gate |
| Asclepias breviantherae | Goyder | 0 | below the evidence gate |
| Asclepias buchwaldii | (Schltr. & K.Schum.) De Wild. | 0 | below the evidence gate |
| Asclepias compressidens | (N.E.Br.) Nicholas | 0 | below the evidence gate |
| Asclepias concinna | (Schltr.) Schltr. | 0 | below the evidence gate |
| Asclepias constricta | M.E.Jones | 0 | below the evidence gate |
| Asclepias conzattii | Woodson | 0 | below the evidence gate |
| Asclepias cooperi | N.E.Br. | 0 | below the evidence gate |
| Asclepias coulteri | A.Gray | 0 | below the evidence gate |
| Asclepias crassicoronata | Goyder | 0 | below the evidence gate |
| Asclepias crassinervis | N.E.Br. | 0 | below the evidence gate |
| Asclepias crocea | Woodson | 0 | below the evidence gate |
| Asclepias cutleri | Woodson | 0 | below the evidence gate |
| Asclepias dependens | (K.Schum.) N.E.Br. | 0 | below the evidence gate |
| Asclepias dinteri | Engl. & Krause | 0 | below the evidence gate |
| Asclepias disparilis | N.E.Br. | 0 | below the evidence gate |
| Asclepias dissona | N.E.Br. | 0 | below the evidence gate |
| Asclepias dregeana | Schltr. | 0 | below the evidence gate |
| Asclepias edentata | Goyder | 0 | below the evidence gate |
| Asclepias elegantula | Fishbein | 0 | below the evidence gate |
| Asclepias euphorbiifolia | Engelm. ex A.Gray | 0 | below the evidence gate |
| Asclepias fimbriata | Weim. | 0 | below the evidence gate |
| Asclepias flanaganii | Schltr. | 0 | below the evidence gate |
| Asclepias foliosa | (K.Schum.) Hiern | 0 | below the evidence gate |
| Asclepias galeottii | E.Fourn. | 0 | below the evidence gate |
| Asclepias gentryi | Standl. | 0 | below the evidence gate |
| Asclepias gordon-grayae | Nicholas | 0 | below the evidence gate |
| Asclepias graminifolia | (Wild) Goyder | 0 | below the evidence gate |
| Asclepias grandirandii | Goyder | 0 | below the evidence gate |
| Asclepias inaequalis | Goyder | 0 | below the evidence gate |
| Asclepias jorgeana | Fishbein & S.P.Lynch | 0 | below the evidence gate |
| Asclepias kamerunensis | Schltr. | 0 | below the evidence gate |
| Asclepias kansana | Vail | 0 | below the evidence gate |
| Asclepias langsdorffii | E.Fourn. | 0 | below the evidence gate |
| Asclepias longirostra | Goyder | 0 | below the evidence gate |
| Asclepias longissima | (K.Schum.) N.E.Br. | 0 | below the evidence gate |
| Asclepias lynchiana | Fishbein | 0 | below the evidence gate |
| Asclepias macvaughii | Woodson | 0 | below the evidence gate |
| Asclepias masonii | Woodson | 0 | below the evidence gate |
| Asclepias mcvaughii | Woodson | 0 | below the evidence gate |
| Asclepias meyeriana | (Schltr.) Schltr. | 0 | below the evidence gate |
| Asclepias minor | (S.Moore) Goyder | 0 | below the evidence gate |
| Asclepias minutiflora | (Goyder) Goyder | 0 | below the evidence gate |
| Asclepias monticola | N.E.Br. | 0 | below the evidence gate |
| Asclepias mtorwiensis | Goyder | 0 | below the evidence gate |
| Asclepias nana | I.Verd. | 0 | below the evidence gate |
| Asclepias nummularioides | W.D.Stevens | 0 | below the evidence gate |
| Asclepias nuttii | N.E.Br. | 0 | below the evidence gate |
| Asclepias occidentalis | Goyder | 0 | below the evidence gate |
| Asclepias palustris | (K.Schum.) Schltr. | 0 | below the evidence gate |
| Asclepias patens | N.E.Br. | 0 | below the evidence gate |
| Asclepias peltigera | (E.Mey.) Schltr. | 0 | below the evidence gate |
| Asclepias pilgeriana | Schltr. | 0 | below the evidence gate |
| Asclepias pseudoamabilis | Goyder | 0 | below the evidence gate |
| Asclepias pseudofimbriata | (Goyder) Goyder | 0 | below the evidence gate |
| Asclepias pseudorubricaulis | Woodson | 0 | below the evidence gate |
| Asclepias puberula | A.Gray | 0 | below the evidence gate |
| Asclepias pygmaea | N.E.Br. | 0 | below the evidence gate |
| Asclepias randii | S.Moore | 0 | below the evidence gate |
| Asclepias rara | N.E.Br. | 0 | below the evidence gate |
| Asclepias schlechteri | (K.Schum.) N.E.Br. | 0 | below the evidence gate |
| Asclepias schumanniana | Hiern | 0 | below the evidence gate |
| Asclepias shabaensis | (Goyder) Goyder | 0 | below the evidence gate |
| Asclepias solstitialis | A.Chev. | 0 | below the evidence gate |
| Asclepias sperryi | Woodson | 0 | below the evidence gate |
| Asclepias sphacelata | (K.Schum.) N.E.Br. | 0 | below the evidence gate |
| Asclepias standleyi | Woodson | 0 | below the evidence gate |
| Asclepias stathmostelmoides | Goyder | 0 | below the evidence gate |
| Asclepias subviridis | S.Moore | 0 | below the evidence gate |
| Asclepias tanganyikensis | E.A.Bruce | 0 | below the evidence gate |
| Asclepias ulophylla | Schltr. | 0 | below the evidence gate |
| Asclepias velutina | (Schltr.) Schltr. | 0 | below the evidence gate |
| Asclepias verdickii | (De Wild.) De Wild. | 0 | below the evidence gate |
| Asclepias vinosa | (E.Fourn.) Woodson | 0 | below the evidence gate |
| Asclepias woodii | (Schltr.) Schltr. | 0 | below the evidence gate |
| Asclepias woodsoniana | Standl. & Steyerm. | 0 | below the evidence gate |
This site is commercial, so it can only publish photographs licensed for commercial use. Roughly three quarters of the photographs on iNaturalist are CC BY-NC, which excludes them. A species needs at least three usable photographs before we will build it a page, because a page with one picture and no traits tells you nothing you could not get from a search result, and generating hundreds of thousands of those is precisely the practice that got the previous version of this site deleted.
So the species above without a link are not errors and they are not omissions. They are real, accepted plants that we cannot yet document to the standard we hold ourselves to, and the count in the photographs column is exactly how far short we fall.