The Plant List — A working list for all plant species

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You should refer instead to the current version of The Plant List.

Results

811 plant name records match your search criteria Asclepias. The results are below.

• Genus Asclepias is in the family Apocynaceae. Species epithets begin with: A B C D E F G H I J K L M N O P Q R S T U V W X Z

The results can also be downloaded as a CSV file.

See "Status", "Confidence level", "Source" for definitions.

Name	Status	Confi­dence level	Source
Asclepias abyssinica (Decne.) N.E.Br.	Synonym		WCSP (in review)
Asclepias acanthocarpus J.F.Gmel. ex Decne.	Synonym		WCSP (in review)
Asclepias acerateoides (Schltr.) Schltr.	Unresolved		WCSP (in review)
Asclepias aceratoides M.A.Curtis	Unresolved		WCSP (in review)
Asclepias aceratoides Nash	Synonym		TRO
Asclepias acida Roxb.	Unresolved		WCSP (in review)
Asclepias acornuta Kellogg [Unplaced]	Unresolved		WCSP (in review)
Asclepias acuminata Pursh	Synonym		WCSP (in review)
Asclepias acuminata Willd. ex Schult.	Synonym		WCSP (in review)
Asclepias acuminata Roxb. [Illegitimate]	Synonym		WCSP (in review)
Asclepias adscendens (Schltr.) Schltr.	Accepted		WCSP (in review)
Asclepias × aequicornu E.Fourn.	Accepted		WCSP (in review)
Asclepias affinis (Schltr.) Schltr.	Accepted		WCSP (in review)
Asclepias affinis De Wild. [Illegitimate]	Synonym		WCSP (in review)
Asclepias ageratoides M.A.Curtis	Accepted		WCSP (in review)
Asclepias alatas Schltr.	Unresolved		TRO
Asclepias alba Mill.	Unresolved		WCSP (in review)
Asclepias alba Cav. [Illegitimate]	Unresolved		WCSP (in review)
Asclepias albens (E.Mey.) Schltr.	Accepted		WCSP (in review)
Asclepias albicans S.Watson	Accepted		WCSP (in review)
Asclepias albida N.E.Br.	Synonym		WCSP (in review)
Asclepias albiflora Raf.	Synonym		WCSP (in review)
Asclepias alboaurantiaca Jacq.	Synonym		WCSP (in review)
Asclepias alexicaca Jacq.	Synonym		WCSP (in review)
Asclepias alexifarmacas Rojas Acosta [Unplaced]	Unresolved		WCSP (in review)
Asclepias alexitoxica St.-Lag.	Synonym		WCSP (in review)
Asclepias alpina Vell.	Synonym		WCSP (in review)
Asclepias alticola E.Fourn.	Synonym		WCSP (in review)
Asclepias altissima Jacq.	Synonym		WCSP (in review)
Asclepias amabilis N.E.Br.	Accepted		WCSP (in review)
Asclepias ameliae S.Moore	Synonym		WCSP (in review)
Asclepias amoena L.	Synonym		WCSP (in review)
Asclepias amoena Brongn. [Illegitimate]	Synonym		WCSP (in review)
Asclepias amplexicaulis Sm.	Accepted		WCSP (in review)
Asclepias amplexicaulis Michx.	Synonym		TRO
Asclepias amsonioides Standl.	Synonym		WCSP (in review)
Asclepias angadensis S.Moore [Unplaced]	Unresolved		WCSP (in review)
Asclepias angulosa Regel [Unplaced]	Unresolved		WCSP (in review)
Asclepias angustata (K.Schum.) N.E.Br.	Unresolved		WCSP (in review)
Asclepias angustifolia Schweigg.	Synonym		WCSP (in review)
Asclepias angustifolia Elliott	Synonym		WCSP (in review)
Asclepias angustifolia Schult.	Synonym		WCSP (in review)
Asclepias angustifolia Sessé & Moç. [Unplaced]	Unresolved		WCSP (in review)
Asclepias angustissima Andersson	Unresolved		WCSP (in review)
Asclepias anisophylla Conrath & Schltr.	Unresolved		WCSP (in review)
Asclepias annularia Roxb.	Unresolved		WCSP (in review)
Asclepias annularis Roxb.	Synonym		TRO
Asclepias aphylla Forssk.	Unresolved		WCSP (in review)
Asclepias aphylla Thunb.	Unresolved		WCSP (in review)
Asclepias aphylla Roxb. ex Wight	Unresolved		WCSP (in review)
Asclepias aphylla Bojer ex Decne.	Synonym		WCSP (in review)
Asclepias apocinum Gaterau	Synonym		WCSP (in review)
Asclepias apocynifolia Woodson	Accepted		WCSP (in review)
Asclepias appendiculata (E.Mey.) Schltr.	Unresolved		WCSP (in review)
Asclepias arborea Salisb. [Illegitimate]	Synonym		WCSP (in review)
Asclepias arborescens L.	Synonym		WCSP (in review)
Asclepias arenaria Torr.	Accepted		WCSP (in review)
Asclepias arenicola Nash	Unresolved		WCSP (in review)
Asclepias argentata Noronha [Unplaced]	Unresolved		WCSP (in review)
Asclepias armata Spreng.	Synonym		WCSP (in review)
Asclepias arvensis Vell.	Unresolved		WCSP (in review)
Asclepias asperula (Decne.) Woodson	Accepted		WCSP (in review)
Asclepias asperula subsp. capricornu (Woodson) Woodson	Accepted		WCSP (in review)
Asclepias asperula var. decumbens (Nutt.) Shinners	Synonym		WCSP (in review)
Asclepias asthmatica L.f.	Unresolved		WCSP (in review)
Asclepias atroviolacea Woodson	Accepted		WCSP (in review)
Asclepias aurantiaca Salisb. [Illegitimate]	Synonym		WCSP (in review)
Asclepias aurea (Schltr.) Schltr.	Accepted		WCSP (in review)
Asclepias aurea var. brevicuspis S.Moore	Synonym		WCSP (in review)
Asclepias aurea var. vittata N.E.Br.	Synonym		WCSP (in review)
Asclepias auriculata Kunth	Accepted		WCSP (in review)
Asclepias auriculata (Engelm. ex Torr.) Holz. [Illegitimate]	Synonym		WCSP (in review)
Asclepias axillaris Vell.	Synonym		WCSP (in review)
Asclepias bagshawei S.Moore	Synonym		WCSP (in review)
Asclepias barbata Linnaeus ex Jackson	Unresolved		TRO
Asclepias barjoniifolia E.Fourn.	Accepted		WCSP (in review)
Asclepias bartlettiana Woodson	Accepted		WCSP (in review)
Asclepias baumii Schltr.	Accepted		WCSP (in review)
Asclepias bicknellii Vail	Synonym		WCSP (in review)
Asclepias bicolor Moench [Illegitimate]	Synonym		WCSP (in review)
Asclepias bicuspis N.E.Br.	Accepted		WCSP (in review)
Asclepias bidentata Hemsl.	Synonym		WCSP (in review)
Asclepias bifida W.H.Blackw.	Accepted		WCSP (in review)
Asclepias × blanchetii E.Fourn.	Synonym		WCSP (in review)
Asclepias boliviensis E.Fourn.	Accepted		WCSP (in review)
Asclepias brachystephana Engelm. ex Torr.	Accepted		WCSP (in review)
Asclepias bracteolata E.Fourn.	Accepted		WCSP (in review)
Asclepias brasiliensis (E.Fourn.) Schltr.	Synonym		WCSP (in review)
Asclepias brevicornu Scheele	Synonym		WCSP (in review)
Asclepias brevicuspis (E.Mey.) Schltr.	Accepted		WCSP (in review)
Asclepias brevipes (Schltr.) Schltr.	Accepted		WCSP (in review)
Asclepias × bridgesii E.Fourn.	Accepted		WCSP (in review)
Asclepias browniana S.Moore	Synonym		WCSP (in review)
Asclepias buchenaviana Schinz	Synonym		WCSP (in review)
Asclepias buchwaldii (Schltr. & K.Schum.) De Wild.	Accepted		WCSP (in review)
Asclepias buchwaldii var. angustifolia De Wild.	Synonym		WCSP (in review)
Asclepias burchellii Schltr.	Accepted		WCSP (in review)
Asclepias cabrae De Wild.	Synonym		WCSP (in review)
Asclepias calceolus S.Moore	Synonym		WCSP (in review)
Asclepias californica Greene	Accepted		WCSP (in review)
Asclepias campestris Vell.	Unresolved		WCSP (in review)
Asclepias campestris Decne.	Synonym		WCSP (in review)
Asclepias campestris var. angustifolia Kuntze	Synonym		WCSP (in review)
Asclepias campestris var. flava Kuntze	Synonym		WCSP (in review)
Asclepias campestris var. heterophylla Kuntze	Synonym		WCSP (in review)
Asclepias campestris var. schlechteri Kuntze	Synonym		WCSP (in review)
Asclepias cancellata Burm.f.	Synonym		WCSP (in review)
Asclepias candida Vell.	Accepted		WCSP (in review)
Asclepias canescens Willd.	Synonym		WCSP (in review)
Asclepias canina Noronha [Unplaced]	Unresolved		WCSP (in review)
Asclepias capitellata Raf.	Synonym		TRO
Asclepias capricornu Woodson	Synonym		WCSP (in review)
Asclepias capricornu subsp. occidentalis Woodson	Synonym		WCSP (in review)
Asclepias carnosa L.f.	Synonym		WCSP (in review)
Asclepias carnosa Blanco [Illegitimate]	Synonym		WCSP (in review)
Asclepias carsonii (N.E.Br.) Schltr.	Synonym		WCSP (in review)
Asclepias chapalensis Brandegee	Accepted		WCSP (in review)
Asclepias chloroglossa Schltr.	Unresolved		WCSP (in review)
Asclepias ciliata Murray ex Decne.	Synonym		WCSP (in review)
Asclepias cinerea Walter	Accepted		WCSP (in review)
Asclepias circinalis (Decne.) Woodson	Accepted		WCSP (in review)
Asclepias cirrosa Ehrenb. ex Schweinf. [Unplaced]	Unresolved		WCSP (in review)
Asclepias citrifolia Jacq.	Synonym		WCSP (in review)
Asclepias citrifolia Hook. & Arn.	Synonym		WCSP (in review)
Asclepias citrifolia var. angustifolia Hook. & Arn.	Synonym		WCSP (in review)
Asclepias clausa Jacq.	Synonym		WCSP (in review)
Asclepias clusiifolia Horsf. ex Schult. [Unplaced]	Unresolved		WCSP (in review)
Asclepias coarctata S.Moore	Synonym		WCSP (in review)
Asclepias coccinea N.E.Br.	Unresolved		WCSP (in review)
Asclepias cochabambensis Rusby	Synonym		WCSP (in review)
Asclepias cognata N.E.Br.	Synonym		WCSP (in review)
Asclepias communis Vell.	Synonym		WCSP (in review)
Asclepias compressa Moench	Synonym		WCSP (in review)
Asclepias compressidens (N.E.Br.) Nicholas	Accepted		WCSP (in review)
Asclepias concinna (Schltr.) Schltr.	Accepted		WCSP (in review)
Asclepias concolor (Decne.) Schltr.	Unresolved		WCSP (in review)
Asclepias confusa (Scott-Elliot) Schltr.	Synonym		WCSP (in review)
Asclepias congolensis De Wild.	Synonym		WCSP (in review)
Asclepias connivens Baldwin ex Elliot	Accepted		WCSP (in review)
Asclepias consanguinea Kunze [Unplaced]	Unresolved		WCSP (in review)
Asclepias conspicua N.E.Br.	Unresolved		WCSP (in review)
Asclepias constricta M.E.Jones	Accepted		WCSP (in review)
Asclepias contorta Forssk.	Unresolved		WCSP (in review)
Asclepias contrayerba Sessé & Moç.	Accepted		WCSP (in review)
Asclepias convolvulacea Willd.	Synonym		WCSP (in review)
Asclepias convolvulacea B.Heyne ex Decne.	Unresolved		WCSP (in review)
Asclepias conzattii Woodson	Accepted		WCSP (in review)
Asclepias cooperi N.E.Br.	Accepted		WCSP (in review)
Asclepias cordata Burm.f.	Unresolved		WCSP (in review)
Asclepias cordata Forssk.	Unresolved		WCSP (in review)
Asclepias cordata Walter	Synonym		WCSP (in review)
Asclepias cordata Vell. [Illegitimate]	Unresolved		WCSP (in review)
Asclepias cordata Sessé & Moç. [Unplaced]	Unresolved		WCSP (in review)
Asclepias cordifolia (Benth.) Jeps.	Accepted		WCSP (in review)
Asclepias cornuta (Decne.) Cordem.	Synonym		WCSP (in review)
Asclepias cornuti Decne.	Synonym		WCSP (in review)
Asclepias coulteri A.Gray	Accepted		WCSP (in review)
Asclepias crassifolia L. ex Decne.	Synonym		WCSP (in review)
Asclepias crassinervis N.E.Br.	Accepted		WCSP (in review)
Asclepias crinita (G.Bertol.) N.E.Br.	Synonym		WCSP (in review)
Asclepias crispa P.J.Bergius	Accepted		WCSP (in review)
Asclepias cristata (Decne.) S.Moore	Synonym		WCSP (in review)
Asclepias crocea Woodson	Accepted		WCSP (in review)
Asclepias cryptoceras S.Watson	Accepted		WCSP (in review)
Asclepias cryptoceras var. davisii (Woodson) W.H.Baker	Synonym		WCSP (in review)
Asclepias cryptoceras subsp. davisii (Woodson) Woodson	Accepted		WCSP (in review)
Asclepias cubensis Wender.	Synonym		WCSP (in review)
Asclepias cucullata (Schltr.) Schltr.	Accepted		WCSP (in review)
Asclepias cucullata subsp. scabrifolia (S.Moore) Goyder	Accepted		WCSP (in review)
Asclepias cucullata var. scabrifolia (S. Moore) Goyder	Synonym		TRO
Asclepias cultriformis Harv. ex Schltr.	Accepted		WCSP (in review)
Asclepias cuneifolia Raf.	Unresolved		WCSP (in review)
Asclepias curassavica L.	Accepted		WCSP (in review)
Asclepias curassavica Griseb. [Illegitimate]	Synonym		WCSP (in review)
Asclepias curassavica Lour.	Synonym		TRO
Asclepias curassavica var. concolor Krug & Urb.	Synonym		WCSP (in review)
Asclepias curassavica f. flaviflora Tawada	Synonym		WCSP (in review)
Asclepias curassavica x nivea Urb.	Unresolved		TRO
Asclepias curtissii A.Gray	Accepted		WCSP (in review)
Asclepias curupi E.Fourn.	Synonym		WCSP (in review)
Asclepias curvipes A.Nelson [Unplaced]	Unresolved		WCSP (in review)
Asclepias cutea Raf.	Unresolved		TRO
Asclepias cutleri Woodson	Accepted		WCSP (in review)
Asclepias cynanchoides Humb. & Bonpl. ex Schult.	Synonym		WCSP (in review)
Asclepias daemia Forssk.	Synonym		WCSP (in review)
Asclepias daemia Blanco [Illegitimate]	Synonym		WCSP (in review)
Asclepias dasypus Raf.	Synonym		WCSP (in review)
Asclepias davisii Woodson	Synonym		WCSP (in review)
Asclepias davurica Willd.	Synonym		WCSP (in review)
Asclepias dealbata (E.Mey.) Schltr.	Unresolved		WCSP (in review)
Asclepias debilis Michx. [Unplaced]	Unresolved		WCSP (in review)
Asclepias decipiens N.E.Br.	Synonym		WCSP (in review)
Asclepias decumbens L.	Synonym		WCSP (in review)
Asclepias decumbens (Nutt.) K.Schum. [Illegitimate]	Synonym		WCSP (in review)
Asclepias demissa Greene [Unplaced]	Unresolved		WCSP (in review)
Asclepias densiflora N.E.Br.	Accepted		WCSP (in review)
Asclepias denticulata Schltr.	Synonym		WCSP (in review)
Asclepias dependens (K.Schum.) N.E.Br.	Accepted		WCSP (in review)
Asclepias depressa (Schltr.) Schltr.	Synonym		WCSP (in review)
Asclepias deregeana var. calceolus (S.Moore) N.E.Br.	Synonym		WCSP (in review)
Asclepias deregeana var. sordida N.E.Br.	Synonym		WCSP (in review)
Asclepias dewevrei De Wild.	Synonym		WCSP (in review)
Asclepias dichotoma Rottler [Invalid]	Unresolved		WCSP (in review)
Asclepias dilatata Linnaeus ex Jackson	Unresolved		TRO
Asclepias dinteri Engl. & Krause	Accepted		WCSP (in review)
Asclepias dioscoridis Fraas [Unplaced]	Unresolved		WCSP (in review)
Asclepias diploglossa (Turcz.) Druce	Synonym		WCSP (in review)
Asclepias disparilis N.E.Br.	Accepted		WCSP (in review)
Asclepias dissoluta (K.Schum.) Schltr.	Synonym		WCSP (in review)
Asclepias dissona N.E.Br.	Accepted		WCSP (in review)
Asclepias douglasii Hook.	Synonym		WCSP (in review)
Asclepias dregeana Schltr.	Synonym		WCSP (in review)
Asclepias eastwoodiana Barneby	Synonym		WCSP (in review)
Asclepias echinata Roxb. [Illegitimate]	Synonym		WCSP (in review)
Asclepias echinata Decne.	Synonym		WCSP (in review)
Asclepias echinata Hook.f.	Unresolved		WCSP (in review)
Asclepias ecornuta Kellogg ex A.Gray [Invalid]	Synonym		WCSP (in review)
Asclepias elata Benth.	Synonym		WCSP (in review)
Asclepias elata x glaucescens	Unresolved		TRO
Asclepias elegans Vell. [Unplaced]	Unresolved		WCSP (in review)
Asclepias elegantula Fishbein	Accepted		WCSP (in review)
Asclepias elliptica Raf.	Synonym		WCSP (in review)
Asclepias eminens (Harv.) Schltr.	Accepted		WCSP (in review)
Asclepias emoryi (Greene) Vail ex Small	Accepted		WCSP (in review)
Asclepias emoryi (Greene) Tidestr.	Unresolved		TRO
Asclepias endotrachys Schltr.	Synonym		WCSP (in review)
Asclepias engelmanniana Woodson	Accepted		WCSP (in review)
Asclepias engelmanniana var. rusbyi (Vail) Kearney	Synonym		WCSP (in review)
Asclepias erecta De Wild.	Synonym		WCSP (in review)
Asclepias eriocarpa Benth.	Accepted		WCSP (in review)
Asclepias eriocarpa Torr. [Illegitimate]	Synonym		WCSP (in review)
Asclepias eriocarpa var. microcarpa Munz & I.M.Johnst.	Synonym		WCSP (in review)
Asclepias erosa Torr.	Accepted		WCSP (in review)
Asclepias erosa var. obtusa (A.Gray) A.Gray	Synonym		WCSP (in review)
Asclepias euphorbiifolia Engelm. ex A.Gray	Accepted		WCSP (in review)
Asclepias euphorbioides A.Chev.	Synonym		WCSP (in review)
Asclepias eustegioides (E.Mey.) Schltr.	Unresolved		WCSP (in review)
Asclepias exaltata L.	Accepted		WCSP (in review)
Asclepias exilis M.E.Jones	Accepted		WCSP (in review)
Asclepias eximia Schltr.	Unresolved		WCSP (in review)
Asclepias expansa (E.Mey.) Schltr.	Accepted		WCSP (in review)
Asclepias extenta S.Moore	Synonym		WCSP (in review)
Asclepias fallax (Schltr.) Schltr.	Accepted		WCSP (in review)
Asclepias fascicularis Decne.	Accepted		WCSP (in review)
Asclepias fasciculata Hemsl. [Spelling variant]	Synonym		WCSP (in review)
Asclepias feayi Chapm. ex A.Gray	Accepted		WCSP (in review)
Asclepias ferruginea Humb. & Bonpl. ex Schult. [Unplaced]	Unresolved		WCSP (in review)
Asclepias fiebrigii Schltr.	Synonym		WCSP (in review)
Asclepias filiformis Jacq.	Synonym		WCSP (in review)
Asclepias filiformis L.f.	Unresolved		WCSP (in review)
Asclepias filiformis (E.Mey.) Kuntze	Synonym		WCSP (in review)
Asclepias filiformis Sessé & Moc.	Synonym		TRO
Asclepias fimbriata Weim.	Accepted		WCSP (in review)
Asclepias firma (N.E.Br.) Schltr. ex Hiern	Synonym		WCSP (in review)
Asclepias flagellaris Bolus ex Schltr.	Synonym		WCSP (in review)
Asclepias flanaganii Schltr.	Accepted		WCSP (in review)
Asclepias flava N.E.Br.	Synonym		WCSP (in review)
Asclepias flava Lillo [Illegitimate]	Synonym		WCSP (in review)
Asclepias flavida N.E.Br.	Synonym		WCSP (in review)
Asclepias flexuosa (E.Mey.) Schltr.	Accepted		WCSP (in review)
Asclepias floridana Lam.	Unresolved		WCSP (in review)
Asclepias fluviatilis A.Chev.	Synonym		WCSP (in review)
Asclepias foetida Cav.	Synonym		WCSP (in review)
Asclepias foliosa (K.Schum.) Hiern	Synonym		WCSP (in review)
Asclepias foliosa (K. Schum.) N.E. Br.	Synonym		TRO
Asclepias fornicata N.E.Br.	Synonym		WCSP (in review)
Asclepias forskohei Schult. in Roem. & Schult.	Unresolved		TRO
Asclepias forsskalii Schult.	Unresolved		WCSP (in review)
Asclepias fournieri Woodson	Accepted		WCSP (in review)
Asclepias fragrans Raf. [Illegitimate]	Synonym		WCSP (in review)
Asclepias fragrans (Benth.) Decne. [Illegitimate]	Synonym		WCSP (in review)
Asclepias frederici Hiern	Synonym		WCSP (in review)
Asclepias fremontii Torr.	Synonym		WCSP (in review)
Asclepias friesii Schltr.	Unresolved		WCSP (in review)
Asclepias fruticosa L.	Synonym		WCSP (in review)
Asclepias fulva N.E.Br.	Accepted		WCSP (in review)
Asclepias fusca Lour.	Unresolved		WCSP (in review)
Asclepias fuscata Willd.	Unresolved		WCSP (in review)
Asclepias galeottii E.Fourn.	Accepted		WCSP (in review)
Asclepias galioides Kunth	Synonym		WCSP (in review)
Asclepias galpinii (Schltr.) Schltr.	Unresolved		WCSP (in review)
Asclepias geminata Roxb.	Synonym		WCSP (in review)
Asclepias geminiflora (Schltr.) Schltr.	Unresolved		WCSP (in review)
Asclepias gentryi Standl.	Accepted		WCSP (in review)
Asclepias gerrardii (Harv.) Schltr.	Unresolved		WCSP (in review)
Asclepias gibba (E.Mey.) Schltr.	Accepted		WCSP (in review)
Asclepias giffordii Eastw.	Synonym		WCSP (in review)
Asclepias gigantea L.	Synonym		WCSP (in review)
Asclepias gigantea Willd. [Illegitimate]	Synonym		WCSP (in review)
Asclepias gigantea Jacq.	Synonym		TRO
Asclepias gigantiflora (K.Schum.) N.E.Br.	Synonym		WCSP (in review)
Asclepias glaberrima Sessé & Moç.	Synonym		WCSP (in review)
Asclepias glaberrima (Oliv.) Schlecht.	Synonym		TRO
Asclepias glabra Mill.	Synonym		WCSP (in review)
Asclepias glabra Forssk.	Unresolved		WCSP (in review)
Asclepias gladewitzii Farw. [Unplaced]	Unresolved		WCSP (in review)
Asclepias glaucescens Kunth	Accepted		WCSP (in review)
Asclepias glaucescens var. elata (Benth.) E.Fourn.	Synonym		WCSP (in review)
Asclepias glaucophylla (Schltr.) Schltr.	Synonym		WCSP (in review)
Asclepias globosa Stokes	Synonym		WCSP (in review)
Asclepias gomphocarpoides (E.Mey.) Schltr.	Unresolved		WCSP (in review)
Asclepias gonalis Raf.	Synonym		WCSP (in review)
Asclepias gonocarpos (Walter) J.F.Gmel.	Synonym		WCSP (in review)
Asclepias gordon-grayae Nicholas	Accepted		WCSP (in review)
Asclepias gossweileri S.Moore	Synonym		WCSP (in review)
Asclepias graminea Lam. [Unplaced]	Unresolved		WCSP (in review)
Asclepias grandiflora L.f.	Unresolved		WCSP (in review)
Asclepias grandiflora E.Fourn. [Illegitimate]	Synonym		WCSP (in review)
Asclepias grandifolia Bertol.	Synonym		WCSP (in review)
Asclepias grantii (Oliv.) Schltr.	Unresolved		WCSP (in review)
Asclepias grayi L.D.Benson	Synonym		WCSP (in review)
Asclepias greeniana Nutt. ex W.Baxter & Wooster [Unplaced]	Unresolved		WCSP (in review)
Asclepias guatemalensis Donn.Sm.	Synonym		WCSP (in review)
Asclepias hallii A.Gray	Accepted		WCSP (in review)
Asclepias harveyana Schltr.	Synonym		WCSP (in review)
Asclepias hassleriana Malme	Synonym		WCSP (in review)
Asclepias hastata Bunge	Synonym		WCSP (in review)
Asclepias hastata (E.Mey.) Schltr. [Illegitimate]	Synonym		WCSP (in review)
Asclepias herbacea Roxb.	Synonym		WCSP (in review)
Asclepias hirtella (Pennell) Woodson	Synonym		WCSP (in review)
Asclepias hispida Vell.	Synonym		WCSP (in review)
Asclepias humilis (E.Mey.) Schltr.	Accepted		WCSP (in review)
Asclepias humistrata Walter	Accepted		WCSP (in review)
Asclepias hybrida Michx.	Synonym		WCSP (in review)
Asclepias hypoleuca (A.Gray) Woodson	Accepted		WCSP (in review)
Asclepias illinoensis Michx. ex Steud.	Synonym		WCSP (in review)
Asclepias incarnata L.	Accepted		WCSP (in review)
Asclepias incarnata Walter [Illegitimate]	Unresolved		WCSP (in review)
Asclepias incarnata f. albiflora (Raf.) A.Heller	Synonym		WCSP (in review)
Asclepias incarnata f. candida Fernald	Synonym		WCSP (in review)
Asclepias incarnata var. glabra Eaton & Wright	Synonym		WCSP (in review)
Asclepias incarnata var. longifolia A. Gray	Synonym		TRO
Asclepias incarnata var. neoscotica Fernald	Synonym		WCSP (in review)
Asclepias incarnata var. pulchra (Ehrh. ex Willd.) Pers.	Synonym		WCSP (in review)
Asclepias incarnata f. pulchra (Ehrh. ex Willd.) Voss	Synonym		WCSP (in review)
Asclepias incarnata subsp. pulchra (Ehrh. ex Willd.) Woodson	Accepted		WCSP (in review)
Asclepias incarnata f. rosea B.Boivin	Synonym		WCSP (in review)
Asclepias inflexa S.Moore [Unplaced]	Unresolved		WCSP (in review)
Asclepias insignis (Schltr.) Schltr.	Unresolved		WCSP (in review)
Asclepias insignis (Brandegee) Woodson [Illegitimate]	Synonym		WCSP (in review)
Asclepias integra N.E.Br.	Synonym		WCSP (in review)
Asclepias intermedia Vail	Synonym		WCSP (in review)
Asclepias involucrata Engelm. ex Torr.	Accepted		WCSP (in review)
Asclepias involucrata var. tomentosa Eastw.	Synonym		WCSP (in review)
Asclepias ivesii (Britton) Wooton & Standl.	Synonym		TRO
Asclepias jacquiniana Spreng.	Synonym		WCSP (in review)
Asclepias jaliscana B.L.Rob.	Accepted		WCSP (in review)
Asclepias jaliscana M.E.Jones [Illegitimate]	Synonym		WCSP (in review)
Asclepias jamesii Torr.	Accepted		WCSP (in review)
Asclepias jangadensis S.Moore	Synonym		WCSP (in review)
Asclepias javanica Burm. ex Decne.	Unresolved		WCSP (in review)
Asclepias jorgeana Fishbein & S.P.Lynch	Accepted		WCSP (in review)
Asclepias kaessneri N.E.Br.	Synonym		WCSP (in review)
Asclepias kamerunensis Schltr.	Accepted		WCSP (in review)
Asclepias kansana Vail	Synonym		WCSP (in review)
Asclepias katangensis De Wild.	Synonym		WCSP (in review)
Asclepias katangensis S.Moore [Illegitimate]	Unresolved		WCSP (in review)
Asclepias klaprothiana Schult. [Unplaced]	Unresolved		WCSP (in review)
Asclepias kotolo Eastw. [Unplaced]	Unresolved		WCSP (in review)
Asclepias kuntzei Schltr.	Synonym		WCSP (in review)
Asclepias labriformis M.E.Jones	Accepted		WCSP (in review)
Asclepias lactifera L.	Synonym		WCSP (in review)
Asclepias lanata (E.Mey.) Druce	Synonym		WCSP (in review)
Asclepias lanceolata Walter	Accepted		WCSP (in review)
Asclepias lanceolata Ives [Illegitimate]	Synonym		WCSP (in review)
Asclepias lanceolata f. flaviflora Fernald	Synonym		WCSP (in review)
Asclepias lanceolata var. paupercula (Michx.) Fernald	Synonym		WCSP (in review)
Asclepias lancifolia Steud.	Synonym		WCSP (in review)
Asclepias lancifolia Raf.	Synonym		WCSP (in review)
Asclepias langsdorffii E.Fourn.	Accepted		WCSP (in review)
Asclepias laniflora Forssk.	Synonym		WCSP (in review)
Asclepias lanuginosa Nutt.	Accepted		WCSP (in review)
Asclepias lanuginosa Kunth [Illegitimate]	Synonym		WCSP (in review)
Asclepias lasiotis Raf.	Synonym		WCSP (in review)
Asclepias latifolia (Torr.) Raf.	Accepted		WCSP (in review)
Asclepias latifolia Britton [Illegitimate]	Synonym		WCSP (in review)
Asclepias laurentiana (Dewèvre) N.E.Br.	Synonym		WCSP (in review)
Asclepias laurifolia Michx.	Synonym		WCSP (in review)
Asclepias laurifolia Roxb.	Synonym		WCSP (in review)
Asclepias laxiflora Perr. ex Colla [Unplaced]	Unresolved		WCSP (in review)
Asclepias laxiflora (Benth.) Decne. [Illegitimate]	Unresolved		WCSP (in review)
Asclepias ledofolia Torr.	Unresolved		TRO
Asclepias lemmonii A.Gray	Accepted		WCSP (in review)
Asclepias lepida S.Moore	Synonym		WCSP (in review)
Asclepias leptopus I.M.Johnst.	Accepted		WCSP (in review)
Asclepias leucocarpa Schltr.	Synonym		WCSP (in review)
Asclepias leucophylla Engelm.	Synonym		WCSP (in review)
Asclepias leucophylla var. obtusa A.Gray	Synonym		WCSP (in review)
Asclepias leucotricha Schltr.	Synonym		WCSP (in review)
Asclepias lilacina Weim.	Synonym		WCSP (in review)
Asclepias linaria Cav.	Accepted		WCSP (in review)
Asclepias lindheimeri Engelm. & A.Gray	Synonym		WCSP (in review)
Asclepias lindleyi Gillies ex Steud.	Synonym		WCSP (in review)
Asclepias linearifolia Pav. ex Decne.	Unresolved		WCSP (in review)
Asclepias linearis Scheele	Accepted		WCSP (in review)
Asclepias lineolata (Decne.) Schltr.	Synonym		WCSP (in review)
Asclepias lineolatus S. Moore	Unresolved		TRO
Asclepias linifolia Kunth	Synonym		WCSP (in review)
Asclepias linifolia Lag. ex Spreng. [Unplaced]	Unresolved		WCSP (in review)
Asclepias lisianthoides (Decne.) N.E.Br.	Synonym		WCSP (in review)
Asclepias litocarpa Chiov.	Synonym		WCSP (in review)
Asclepias lonchophylla Greene [Unplaced]	Unresolved		WCSP (in review)
Asclepias longicornis Kellogg [Unplaced]	Unresolved		WCSP (in review)
Asclepias longicornu Benth.	Synonym		WCSP (in review)
Asclepias longiflora Jacq.	Unresolved		WCSP (in review)
Asclepias longifolia Michx.	Accepted		WCSP (in review)
Asclepias longifolia Sessé & Moc.	Synonym		TRO
Asclepias longifolia subsp. hirtella (Pennell) J.Farmer & C.R.Bell	Accepted		WCSP (in review)
Asclepias longipedunculata Brandegee	Accepted		WCSP (in review)
Asclepias longipetala Scheele	Synonym		WCSP (in review)
Asclepias longissima (K.Schum.) N.E.Br.	Accepted		WCSP (in review)
Asclepias longistigma Roxb.	Synonym		WCSP (in review)
Asclepias lutea Mill.	Unresolved		WCSP (in review)
Asclepias lutea Raf. [Illegitimate]	Synonym		WCSP (in review)
Asclepias lynchiana Fishbein	Accepted		WCSP (in review)
Asclepias mackenii (Harv.) Schltr.	Synonym		WCSP (in review)
Asclepias macra Schltr.	Unresolved		WCSP (in review)
Asclepias macrantha Hochst. ex Oliv.	Unresolved		WCSP (in review)
Asclepias macrantha Hochst. ex Decne.	Synonym		TRO
Asclepias macrochila Schltr.	Synonym		WCSP (in review)
Asclepias macropetala (Schltr. & K.Schum.) N.E.Br.	Unresolved		WCSP (in review)
Asclepias macrophylla Humb. & Bonpl. ex Schult.	Synonym		WCSP (in review)
Asclepias macrophylla Nutt. [Illegitimate]	Synonym		WCSP (in review)
Asclepias macrophylla var. comosa Durand & Hilg.	Synonym		WCSP (in review)
Asclepias macropus (Schltr.) Schltr.	Accepted		WCSP (in review)
Asclepias macrosperma Eastw. ex Vail	Synonym		WCSP (in review)
Asclepias macrotis Torr.	Accepted		WCSP (in review)
Asclepias macroura A.Gray	Accepted		WCSP (in review)
Asclepias macvaughii Woodson	Accepted		WCSP (in review)
Asclepias margaritacea Hoffmanns. ex Schult.	Synonym		WCSP (in review)
Asclepias marginata Decne.	Synonym		WCSP (in review)
Asclepias marginata var. bodenbenderi Kuntze	Synonym		WCSP (in review)
Asclepias maritima Jacq.	Synonym		WCSP (in review)
Asclepias maritima Pall. [Unplaced]	Unresolved		WCSP (in review)
Asclepias maritima Raf.	Synonym		WCSP (in review)
Asclepias maritima Raf. ex Decne.	Synonym		WCSP (in review)
Asclepias mashonensis Schltr.	Synonym		WCSP (in review)
Asclepias masonii Woodson	Accepted		WCSP (in review)
Asclepias mazatlanensis Sessé & Moç.	Accepted		WCSP (in review)
Asclepias meadii Torr. ex A.Gray	Accepted		WCSP (in review)
Asclepias media Steud.	Unresolved		WCSP (in review)
Asclepias megalotis Raf.	Synonym		WCSP (in review)
Asclepias melantha Decne.	Accepted		WCSP (in review)
Asclepias meliodora (Schltr.) Schltr.	Accepted		WCSP (in review)
Asclepias meliodora var. brevicoronata N.E.Br.	Synonym		WCSP (in review)
Asclepias mellodora A.St.-Hil.	Accepted		WCSP (in review)
Asclepias mellodora var. bodenbenderi (Kuntze) Bollw.	Synonym		TRO
Asclepias mellodora var. minor A.St.-Hil.	Synonym		WCSP (in review)
Asclepias mellodora var. multinervis (E. Fourn.) Bollw.	Synonym		TRO
Asclepias mexicana Cav.	Synonym		WCSP (in review)
Asclepias meyeriana (Schltr.) Schltr.	Accepted		WCSP (in review)
Asclepias michauxii Decne.	Accepted		WCSP (in review)
Asclepias micrantha Roxb.	Synonym		WCSP (in review)
Asclepias microphylla Roth ex Schult.	Unresolved		WCSP (in review)
Asclepias minuta A.Chev.	Synonym		WCSP (in review)
Asclepias mirifica Woodson	Accepted		WCSP (in review)
Asclepias modesta N.E.Br.	Synonym		WCSP (in review)
Asclepias modesta var. foliosa N.E.Br.	Synonym		WCSP (in review)
Asclepias monantha Vell.	Unresolved		WCSP (in review)
Asclepias montana Roxb.	Synonym		WCSP (in review)
Asclepias montevidensis Spreng. ex E.Fourn.	Synonym		WCSP (in review)
Asclepias monticola N.E.Br.	Accepted		WCSP (in review)
Asclepias moorei De Wild.	Unresolved		WCSP (in review)
Asclepias mucronata Thunb.	Unresolved		WCSP (in review)
Asclepias muhindensis N.E.Br.	Synonym		WCSP (in review)
Asclepias multicaulis Vell.	Unresolved		WCSP (in review)
Asclepias multicaulis (E.Mey.) Schltr. [Illegitimate]	Unresolved		WCSP (in review)
Asclepias multiflora (Decne.) N.E.Br.	Synonym		WCSP (in review)
Asclepias multinervis E.Fourn.	Synonym		WCSP (in review)
Asclepias munonquensis S.Moore	Unresolved		WCSP (in review)
Asclepias muricata Schumach. & Thonn.	Synonym		WCSP (in review)
Asclepias nana Verd.	Accepted		WCSP (in review)
Asclepias navicularis (E.Mey.) Schltr.	Accepted		WCSP (in review)
Asclepias navicularis var. compressidens N.E.Br.	Synonym		WCSP (in review)
Asclepias neglecta Hemsl.	Accepted		WCSP (in review)
Asclepias negrii Chiov.	Synonym		WCSP (in review)
Asclepias nemorensis S.Moore	Synonym		WCSP (in review)
Asclepias nervosa Decne.	Synonym		WCSP (in review)
Asclepias nigra L.	Synonym		WCSP (in review)
Asclepias nitida Vell.	Unresolved		WCSP (in review)
Asclepias nivalis J.F.Gmel.	Unresolved		WCSP (in review)
Asclepias nivea L.	Accepted		WCSP (in review)
Asclepias nivea Forssk. [Illegitimate]	Unresolved		WCSP (in review)
Asclepias nivea Sims	Synonym		WCSP (in review)
Asclepias nivea var. curassavica (L.) Kuntze	Synonym		WCSP (in review)
Asclepias nivea var. flava Kuntze	Synonym		WCSP (in review)
Asclepias nivea var. intermedia Schltr.	Synonym		WCSP (in review)
Asclepias nivea var. normalis Kuntze	Synonym		WCSP (in review)
Asclepias notha W.D.Stevens	Accepted		WCSP (in review)
Asclepias nuda Thonn. & Schumach.	Unresolved		WCSP (in review)
Asclepias nummularia Torr.	Accepted		WCSP (in review)
Asclepias nummularioides W.D.Stevens	Accepted		WCSP (in review)
Asclepias nutans Muhl. ex Steud. [Invalid]	Unresolved		WCSP (in review)
Asclepias nutans (Klotzsch) N.E.Br.	Synonym		WCSP (in review)
Asclepias nuttalliana Torr. [Illegitimate]	Synonym		WCSP (in review)
Asclepias nuttalliana A.Gray [Illegitimate]	Synonym		WCSP (in review)
Asclepias nuttii N.E.Br.	Accepted		WCSP (in review)
Asclepias nyctaginifolia A.Gray	Accepted		WCSP (in review)
Asclepias nyikana Schltr.	Synonym		WCSP (in review)
Asclepias obovata Elliott	Accepted		WCSP (in review)
Asclepias obtusata Greene [Unplaced]	Unresolved		WCSP (in review)
Asclepias obtusifolia Michx. [Unplaced]	Unresolved		WCSP (in review)
Asclepias obtusifolia Kunze [Illegitimate]	Synonym		WCSP (in review)
Asclepias obtusifolia var. latifolia Torr.	Synonym		WCSP (in review)
Asclepias occidentalis Goyder	Unresolved		TRO
Asclepias ochroleuca (Schltr.) Schltr.	Synonym		WCSP (in review)
Asclepias odorata (K.Schum.) N.E.Br.	Unresolved		WCSP (in review)
Asclepias odoratissima Roxb.	Unresolved		WCSP (in review)
Asclepias oenotheroides Cham. & Schltdl.	Accepted		WCSP (in review)
Asclepias orbicularis (E.Mey.) Schltr.	Unresolved		WCSP (in review)
Asclepias oreophila Nicholas ex Hilliard & B.L.Burtt	Accepted		WCSP (in review)
Asclepias otarioides E.Fourn.	Accepted		WCSP (in review)
Asclepias ovalifolia Decne.	Accepted		WCSP (in review)
Asclepias ovalifolia f. verticillifolia D.Löve & J.-P.Bernard	Synonym		WCSP (in review)
Asclepias ovata Steud. [Invalid]	Synonym		WCSP (in review)
Asclepias ovata M.Martens & Galeotti	Accepted		WCSP (in review)
Asclepias oxytropis (Turcz.) Schltr.	Synonym		WCSP (in review)
Asclepias pachyclada (K.Schum.) N.E.Br.	Unresolved		WCSP (in review)
Asclepias pachyglossa (Schltr.) Schltr.	Synonym		WCSP (in review)
Asclepias pachystephana (Schltr.) Schltr.	Synonym		WCSP (in review)
Asclepias pallida Roxb.	Unresolved		WCSP (in review)
Asclepias pallida E.Fourn. [Illegitimate]	Synonym		WCSP (in review)
Asclepias palmeri Vail	Synonym		WCSP (in review)
Asclepias palustris (K.Schum.) Schltr.	Synonym		WCSP (in review)
Asclepias paniculata Bunge	Synonym		WCSP (in review)
Asclepias papillosa Silveira	Synonym		WCSP (in review)
Asclepias parasitica Wall. ex Hornem.	Unresolved		WCSP (in review)
Asclepias parasitica Roxb.	Synonym		TRO
Asclepias parviflora Aiton	Synonym		WCSP (in review)
Asclepias parviflora Schult.	Synonym		WCSP (in review)
Asclepias parviflora Leconte ex Decne.	Synonym		WCSP (in review)
Asclepias parviflora var. latifolia Raf.	Synonym		WCSP (in review)
Asclepias parvifolia Roem. & Schult.	Synonym		WCSP (in review)
Asclepias parvifolia Decne.	Synonym		WCSP (in review)
Asclepias parvula (A.Gray) Vail	Synonym		WCSP (in review)
Asclepias patens N.E.Br.	Accepted		WCSP (in review)
Asclepias patula Decne.	Synonym		WCSP (in review)
Asclepias pauciflora (Klotzsch) E.A.Bruce	Unresolved		WCSP (in review)
Asclepias paupercula Michx.	Synonym		WCSP (in review)
Asclepias pedicellata Walter	Accepted		WCSP (in review)
Asclepias pedunculata (Decne.) Dandy	Unresolved		WCSP (in review)
Asclepias pellucida E.Fourn.	Accepted		WCSP (in review)
Asclepias peltigera (E.Mey.) Schltr.	Accepted		WCSP (in review)
Asclepias pendula Roxb.	Synonym		WCSP (in review)
Asclepias peregrina Blanco	Synonym		WCSP (in review)
Asclepias perennis Walter	Accepted		WCSP (in review)
Asclepias perennis var. parvula A.Gray	Synonym		WCSP (in review)
Asclepias periplocifolia Nutt.	Synonym		WCSP (in review)
Asclepias petherickiana (Oliv.) Schltr.	Unresolved		WCSP (in review)
Asclepias phenax Woodson	Synonym		WCSP (in review)
Asclepias philippsiae N.E.Br.	Synonym		WCSP (in review)
Asclepias phillipsiae N.E. Br.	Unresolved		TRO
Asclepias physocarpa (E.Mey.) Schltr.	Synonym		WCSP (in review)
Asclepias phytolaccoides G.F.Lyon ex Pursh	Synonym		WCSP (in review)
Asclepias pilgeriana Schltr.	Accepted		WCSP (in review)
Asclepias pilosa Vell.	Unresolved		WCSP (in review)
Asclepias pinifolia Greene	Synonym		WCSP (in review)
Asclepias planiflora Jacq.	Synonym		WCSP (in review)
Asclepias plicata B.Heyne ex Schult. [Unplaced]	Unresolved		WCSP (in review)
Asclepias plumieriifolia Ram.Goyena	Synonym		WCSP (in review)
Asclepias polyphylla Brandegee	Synonym		WCSP (in review)
Asclepias polystachya Walter	Synonym		WCSP (in review)
Asclepias praemorsa Schltr.	Accepted		WCSP (in review)
Asclepias pratensis Benth.	Accepted		WCSP (in review)
Asclepias praticola S.Moore	Unresolved		WCSP (in review)
Asclepias pre Herbarium Practice, Following Retief.	Unresolved		TRO
Asclepias princeps Bartl. [Unplaced]	Unresolved		WCSP (in review)
Asclepias pringlei (Greenm.) Woodson	Accepted		WCSP (in review)
Asclepias procera Aiton	Synonym		WCSP (in review)
Asclepias procumbens Raf. [Unplaced]	Unresolved		WCSP (in review)
Asclepias prolifera Rottler ex Ainslie [Unplaced]	Unresolved		WCSP (in review)
Asclepias propinqua N.E.Br.	Unresolved		WCSP (in review)
Asclepias prostrata W.H.Blackw.	Accepted		WCSP (in review)
Asclepias pseudocrispa Schltr. [Unplaced]	Unresolved		WCSP (in review)
Asclepias pseudorubricaulis Woodson	Accepted		WCSP (in review)
Asclepias pseudosarsa Roxb.	Unresolved		WCSP (in review)
Asclepias puberula A.Gray	Accepted		WCSP (in review)
Asclepias pubescens L.	Synonym		WCSP (in review)
Asclepias pubescens Moench [Illegitimate]	Synonym		WCSP (in review)
Asclepias pubigera Dumort.	Synonym		WCSP (in review)
Asclepias pubiseta N.E.Br.	Synonym		WCSP (in review)
Asclepias pulchella Salisb.	Synonym		WCSP (in review)
Asclepias pulchella Roxb.	Unresolved		WCSP (in review)
Asclepias pulchella (Decne.) N.E.Br. [Illegitimate]	Synonym		WCSP (in review)
Asclepias pulchra Ehrh. ex Willd.	Synonym		WCSP (in review)
Asclepias pulchra Vell.	Synonym		WCSP (in review)
Asclepias pulchra f. albiflora House	Synonym		WCSP (in review)
Asclepias pumila (A.Gray) Vail	Accepted		WCSP (in review)
Asclepias purpurascens L.	Accepted		WCSP (in review)
Asclepias purpurascens Georgi [Illegitimate]	Unresolved		WCSP (in review)
Asclepias purpurascens Walter [Illegitimate]	Synonym		WCSP (in review)
Asclepias purpurea Pall.	Synonym		WCSP (in review)
Asclepias purpurescens x syriaca	Unresolved		TRO
Asclepias purpusii Brandegee	Synonym		WCSP (in review)
Asclepias pygmaea N.E.Br.	Accepted		WCSP (in review)
Asclepias quadrifolia Jacq.	Accepted		WCSP (in review)
Asclepias quadrifolia var. lanceolata Alph.Wood	Synonym		WCSP (in review)
Asclepias quadrifolia var. oppositifolia Raf.	Synonym		WCSP (in review)
Asclepias quinquedentata A.Gray	Accepted		WCSP (in review)
Asclepias quinquedentata var. neomexicana Greene ex A.Gray	Synonym		WCSP (in review)
Asclepias quinqueflora Vell. [Unplaced]	Unresolved		WCSP (in review)
Asclepias racemosa Jacq.	Synonym		WCSP (in review)
Asclepias racemosa Roxb. [Illegitimate]	Synonym		WCSP (in review)
Asclepias radians Forssk.	Unresolved		WCSP (in review)
Asclepias radiata S.Moore	Synonym		WCSP (in review)
Asclepias rafaelensis Brandegee	Accepted		WCSP (in review)
Asclepias ramosa E.Fourn.	Synonym		WCSP (in review)
Asclepias randii S.Moore	Accepted		WCSP (in review)
Asclepias rara N.E.Br.	Accepted		WCSP (in review)
Asclepias ratiata S. Moore	Unresolved		TRO
Asclepias rectinervis (Schltr.) Schltr.	Synonym		WCSP (in review)
Asclepias reenensis N.E.Br.	Synonym		WCSP (in review)
Asclepias reflectens (E.Mey.) Schltr.	Unresolved		WCSP (in review)
Asclepias reflexa (Britten & Rendle) Britten & Rendle	Unresolved		WCSP (in review)
Asclepias repanda Forssk. ex Steud. [Invalid]	Unresolved		WCSP (in review)
Asclepias repanda Sessé & Moç. [Unplaced]	Unresolved		WCSP (in review)
Asclepias revoluta Raf.	Synonym		WCSP (in review)
Asclepias rhacodes (K.Schum.) N.E.Br.	Synonym		WCSP (in review)
Asclepias rhodesica Weim.	Synonym		WCSP (in review)
Asclepias rigida (E.Mey.) Schltr.	Unresolved		WCSP (in review)
Asclepias rigidus Schltr.	Unresolved		TRO
Asclepias rivalis S.Moore	Synonym		WCSP (in review)
Asclepias rivularis (Schltr.) Schltr.	Synonym		WCSP (in review)
Asclepias robusta (A.Rich.) N.E.Br.	Unresolved		WCSP (in review)
Asclepias rolfsii Britton ex Vail	Synonym		WCSP (in review)
Asclepias rosea Kunth	Accepted		WCSP (in review)
Asclepias rosea Roxb. [Illegitimate]	Synonym		WCSP (in review)
Asclepias rostrata N.E.Br.	Synonym		WCSP (in review)
Asclepias rothrockii Greene [Unplaced]	Unresolved		WCSP (in review)
Asclepias rotundifolia Mill.	Synonym		WCSP (in review)
Asclepias rotundifolia Raf. [Illegitimate]	Synonym		WCSP (in review)
Asclepias rubella N.E.Br.	Synonym		WCSP (in review)
Asclepias rubicunda Schltr.	Synonym		WCSP (in review)
Asclepias rubra L.	Accepted		WCSP (in review)
Asclepias rubra Siev. [Illegitimate]	Synonym		WCSP (in review)
Asclepias rubra var. laurifolia (Michx.) R.M.Harper	Synonym		WCSP (in review)
Asclepias rubricaulis Kunth	Accepted		WCSP (in review)
Asclepias rusbyi (Vail) Woodson	Accepted		WCSP (in review)
Asclepias ruthiae Maguire	Synonym		WCSP (in review)
Asclepias rzedowskii W.D.Stevens	Synonym		WCSP (in review)
Asclepias sabulosa Schltr.	Synonym		WCSP (in review)
Asclepias salicifolia Salisb. [Illegitimate]	Synonym		WCSP (in review)
Asclepias salicifolia Lodd. [Unplaced]	Unresolved		WCSP (in review)
Asclepias sanjuanensis K.D.Heil, J.M.Porter & S.L.Welsh	Synonym		WCSP (in review)
Asclepias scabra (Harv.) Schltr.	Unresolved		WCSP (in review)
Asclepias scabridifolia Schltr.	Unresolved		WCSP (in review)
Asclepias scabrifolia S.Moore	Synonym		WCSP (in review)
Asclepias scandens Mill.	Unresolved		WCSP (in review)
Asclepias scandens P.Beauv. [Illegitimate]	Synonym		WCSP (in review)
Asclepias scandens Sessé & Moç. [Unplaced]	Unresolved		WCSP (in review)
Asclepias scaposa Vail	Accepted		WCSP (in review)
Asclepias schaffneri A.Gray	Accepted		WCSP (in review)
Asclepias scheryi Woodson	Accepted		WCSP (in review)
Asclepias schinziana (Schltr.) Schltr.	Unresolved		WCSP (in review)
Asclepias schizoglossoides Schltr.	Synonym		WCSP (in review)
Asclepias schlechteri (K.Schum.) N.E.Br.	Accepted		WCSP (in review)
Asclepias schumanniana Hiern	Synonym		WCSP (in review)
Asclepias schweinfurthii N.E.Br.	Unresolved		WCSP (in review)
Asclepias selloana E.Fourn.	Synonym		WCSP (in review)
Asclepias semiamplectens (K.Schum.) Hiern	Synonym		WCSP (in review)
Asclepias semilunata (A.Rich.) N.E.Br.	Synonym		WCSP (in review)
Asclepias senecionifolia M.E.Jones	Synonym		WCSP (in review)
Asclepias serica Raf. [Illegitimate]	Synonym		WCSP (in review)
Asclepias serpentaria Raf.	Synonym		WCSP (in review)
Asclepias setosa Forssk.	Synonym		WCSP (in review)
Asclepias setosa Benth. [Illegitimate]	Synonym		WCSP (in review)
Asclepias sibirica L.	Synonym		WCSP (in review)
Asclepias similis Hemsl.	Accepted		WCSP (in review)
Asclepias simplex (Schltr.) Schltr.	Synonym		WCSP (in review)
Asclepias simpsonii Chapm. [Unplaced]	Unresolved		WCSP (in review)
Asclepias sinaica (Boiss.) Muschl.	Synonym		WCSP (in review)
Asclepias singularis Vell. [Unplaced]	Unresolved		WCSP (in review)
Asclepias sinuosa Burm.f.	Synonym		WCSP (in review)
Asclepias solanoana Woodson	Accepted		WCSP (in review)
Asclepias solstitialis A.Chev.	Accepted		WCSP (in review)
Asclepias speciosa Torr.	Accepted		WCSP (in review)
Asclepias spectabile N.E. Br.	Unresolved		TRO
Asclepias spectabilis N.E.Br.	Unresolved		WCSP (in review)
Asclepias sperryi Woodson	Accepted		WCSP (in review)
Asclepias sphacelata (K.Schum.) N.E.Br.	Accepted		WCSP (in review)
Asclepias spinosa Vell. [Unplaced]	Unresolved		WCSP (in review)
Asclepias spiraliflora Stokes	Synonym		WCSP (in review)
Asclepias spiralis Forssk.	Synonym		WCSP (in review)
Asclepias standleyi Woodson	Accepted		WCSP (in review)
Asclepias stellata Burm. ex Decne.	Synonym		WCSP (in review)
Asclepias stellifera Schltr.	Accepted		WCSP (in review)
Asclepias stenophylla A.Gray	Accepted		WCSP (in review)
Asclepias stipitacea Forssk.	Synonym		WCSP (in review)
Asclepias stockenstromense Schltr.	Unresolved		TRO
Asclepias stockenstromensis (Scott-Elliot) Schltr.	Unresolved		WCSP (in review)
Asclepias stolzianus (K.Schum.) N.E.Br.	Synonym		WCSP (in review)
Asclepias suaveolens Leconte ex Decne.	Synonym		WCSP (in review)
Asclepias subaphylla Woodson	Accepted		WCSP (in review)
Asclepias suberosa Roxb.	Unresolved		WCSP (in review)
Asclepias subulata Forssk.	Unresolved		WCSP (in review)
Asclepias subulata Decne.	Accepted		WCSP (in review)
Asclepias subulata Larrañaga [Illegitimate]	Synonym		WCSP (in review)
Asclepias subverticillata (A.Gray) Vail	Accepted		WCSP (in review)
Asclepias subviridis S.Moore	Accepted		WCSP (in review)
Asclepias suffrutex Standl.	Accepted		WCSP (in review)
Asclepias sullivantii Engelm. ex A.Gray	Accepted		WCSP (in review)
Asclepias sullivantii Torr.	Synonym		WCSP (in review)
Asclepias sulphurea Schltr.	Synonym		WCSP (in review)
Asclepias sussuela Roxb.	Synonym		WCSP (in review)
Asclepias swynnertonii S.Moore	Synonym		WCSP (in review)
Asclepias syriaca L.	Accepted		WCSP (in review)
Asclepias syriaca var. exaltata (L.) L.	Synonym		TRO
Asclepias syriaca f. inermis J.R.Churchill	Synonym		WCSP (in review)
Asclepias syriaca var. kansana (Vail) E.J.Palmer & Steyerm.	Synonym		WCSP (in review)
Asclepias syriaca f. leucantha Dore	Synonym		WCSP (in review)
Asclepias syriaca f. polyphylla B.Boivin	Synonym		WCSP (in review)
Asclepias tanganyikensis E.A.Bruce	Accepted		WCSP (in review)
Asclepias tapalpana M.E.Jones	Accepted		WCSP (in review)
Asclepias tenacissima Roxb.	Unresolved		WCSP (in review)
Asclepias tenuifolia N.E.Br.	Synonym		WCSP (in review)
Asclepias tenuifolia Schltr. [Illegitimate]	Synonym		WCSP (in review)
Asclepias tenuis Hook.f.	Unresolved		WCSP (in review)
Asclepias tenuissima Roxb.	Unresolved		WCSP (in review)
Asclepias tetrapetala Dennst.	Unresolved		WCSP (in review)
Asclepias texana A.Heller	Accepted		WCSP (in review)
Asclepias tinctoria Roxb.	Unresolved		WCSP (in review)
Asclepias tingens Roxb.	Unresolved		WCSP (in review)
Asclepias tithymaloides Greene	Synonym		WCSP (in review)
Asclepias tomentosa Elliott	Accepted		WCSP (in review)
Asclepias tomentosa Thonn. ex Decne.	Synonym		WCSP (in review)
Asclepias tomentosa Hook.f. [Illegitimate]	Unresolved		WCSP (in review)
Asclepias toxicaria Salisb.	Synonym		WCSP (in review)
Asclepias transvaalensis (Schltr.) Schltr.	Unresolved		WCSP (in review)
Asclepias tricorniculata Schltr.	Unresolved		TRO
Asclepias truncata Willd. [Unplaced]	Unresolved		WCSP (in review)
Asclepias truncata Roxb. ex Decne.	Synonym		WCSP (in review)
Asclepias tuberosa L.	Accepted		WCSP (in review)
Asclepias tuberosa f. bicolor Standl.	Synonym		WCSP (in review)
Asclepias tuberosa var. cordata Beck	Synonym		WCSP (in review)
Asclepias tuberosa var. decumbens (L.) Pursh	Synonym		WCSP (in review)
Asclepias tuberosa f. decumbens (L.) Voss	Synonym		WCSP (in review)
Asclepias tuberosa f. flavescens Farw.	Synonym		WCSP (in review)
Asclepias tuberosa var. flexuosa J.James	Synonym		WCSP (in review)
Asclepias tuberosa subsp. interior Woodson	Accepted		WCSP (in review)
Asclepias tuberosa var. interior (Woodson) Shinners	Synonym		WCSP (in review)
Asclepias tuberosa var. interior (Woodson) Seymour	Synonym		TRO
Asclepias tuberosa f. lutea Clute	Synonym		WCSP (in review)
Asclepias tuberosa subsp. rolfsii (Britton ex Vail) Woodson	Accepted		WCSP (in review)
Asclepias tuberosa var. rolfsii (Britton ex Vail) Shinners	Synonym		WCSP (in review)
Asclepias tuberosa subsp. terminalis Woodson	Synonym		WCSP (in review)
Asclepias tunicata Hook.f.	Unresolved		WCSP (in review)
Asclepias tysoniana Schltr.	Synonym		WCSP (in review)
Asclepias ulophylla Schltr.	Accepted		WCSP (in review)
Asclepias umbellata Vell.	Synonym		WCSP (in review)
Asclepias uncialis Greene	Accepted		WCSP (in review)
Asclepias uncialis var. ruthiae (Maguire) Sundell	Synonym		WCSP (in review)
Asclepias uncialis subsp. ruthiae (Maguire) J.T.Kartesz & Gandhi	Accepted		WCSP (in review)
Asclepias undulata L.	Synonym		WCSP (in review)
Asclepias undulata Jacq. [Illegitimate]	Synonym		WCSP (in review)
Asclepias uvirensis S.Moore	Unresolved		WCSP (in review)
Asclepias valida (Schltr.) Schltr.	Synonym		WCSP (in review)
Asclepias vanilla Raf.	Synonym		WCSP (in review)
Asclepias variegata L.	Accepted		WCSP (in review)
Asclepias variegata var. major Hook.	Synonym		WCSP (in review)
Asclepias variegata var. minor Hook.	Synonym		WCSP (in review)
Asclepias velutina (Schltr.) Schltr.	Accepted		WCSP (in review)
Asclepias verdickii (De Wild.) De Wild.	Accepted		WCSP (in review)
Asclepias verecunda Salisb.	Synonym		WCSP (in review)
Asclepias verticillata L.	Accepted		WCSP (in review)
Asclepias verticillata var. galioides (Kunth) Decne.	Synonym		WCSP (in review)
Asclepias verticillata var. galioides (Kunth) E. Fourn.	Synonym		TRO
Asclepias verticillata var. linearis (Scheele) Pollard	Synonym		WCSP (in review)
Asclepias verticillata var. linifolia (Kunth) Decne.	Synonym		WCSP (in review)
Asclepias verticillata var. mexicana (Cav.) E.Fourn.	Synonym		WCSP (in review)
Asclepias verticillata var. pumila A.Gray	Synonym		WCSP (in review)
Asclepias verticillata var. subverticillata A.Gray	Synonym		WCSP (in review)
Asclepias vestita Hook. & Arn.	Accepted		WCSP (in review)
Asclepias vestita var. parishii Jeps.	Synonym		WCSP (in review)
Asclepias vestita subsp. parishii (Jeps.) Woodson	Accepted		WCSP (in review)
Asclepias vexillare Schltr.	Unresolved		TRO
Asclepias vexillata Schltr.	Unresolved		WCSP (in review)
Asclepias vicaria N.E.Br.	Accepted		WCSP (in review)
Asclepias vicinalis Mart. [Invalid]	Synonym		WCSP (in review)
Asclepias villosa Mill.	Unresolved		WCSP (in review)
Asclepias villosa Balb. [Illegitimate]	Unresolved		WCSP (in review)
Asclepias viminalis Sw.	Synonym		WCSP (in review)
Asclepias vincetoxicum L.	Synonym		WCSP (in review)
Asclepias vinosa (E.Fourn.) Woodson	Accepted		WCSP (in review)
Asclepias virgata Balb.	Synonym		WCSP (in review)
Asclepias viridiflora Raf.	Accepted		WCSP (in review)
Asclepias viridiflora Roxb. ex Decne. [Invalid]	Synonym		WCSP (in review)
Asclepias viridiflora (E.Mey.) Goyder [Illegitimate]	Synonym		WCSP (in review)
Asclepias viridiflora var. lanceolata (E.Ives) Torr.	Synonym		WCSP (in review)
Asclepias viridiflora var. linearis (A.Gray) Fernald	Synonym		WCSP (in review)
Asclepias viridiflora var. obovata (Elliott) Torr.	Synonym		WCSP (in review)
Asclepias viridiflora var. pubescentitomentosa Hook.	Synonym		WCSP (in review)
Asclepias viridis Walter	Accepted		WCSP (in review)
Asclepias viridula Chapm.	Accepted		WCSP (in review)
Asclepias virletii E.Fourn.	Accepted		WCSP (in review)
Asclepias volubilis L.f.	Synonym		WCSP (in review)
Asclepias volubilis Dombey ex Decne.	Synonym		WCSP (in review)
Asclepias volubilis Hook.f.	Unresolved		WCSP (in review)
Asclepias vomeriformis S.Moore	Unresolved		WCSP (in review)
Asclepias vomitoria K.D.Koenig ex Hook.f. [Invalid]	Unresolved		WCSP (in review)
Asclepias weddellii E.Fourn.	Synonym		WCSP (in review)
Asclepias welshii N.H.Holmgren & P.K.Holmgren	Accepted		WCSP (in review)
Asclepias welwitschii (Britten & Rendle) N.E.Br.	Synonym		WCSP (in review)
Asclepias welwitschii (Britton & Rendle) Britton & Rendle	Synonym		TRO
Asclepias woodii (Schltr.) Schltr.	Accepted		WCSP (in review)
Asclepias woodsoniana Standl. & Steyerm.	Accepted		WCSP (in review)
Asclepias wrightii Greene	Synonym		WCSP (in review)
Asclepias xysmalobioides S.Moore	Synonym		WCSP (in review)
Asclepias xysmalobioides Hilliard & B.L.Burtt [Unplaced]	Unresolved		WCSP (in review)
Asclepias zacatecana McVaugh	Synonym		WCSP (in review)
Asclepias zanthodacryon (L.B.Sm.) Woodson	Accepted		WCSP (in review)
Asclepias zeylanica Burm. ex Decne.	Unresolved		WCSP (in review)