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496.0000 Family Apocynaceae Juss.; Gen. Pl. [Jussieu] 143 (1789), nom. cons.
372 genera, ca. 6500 spp. According to modern authors and PCR Asclepiadaceae is only a subfamily of Apocynaceae.
Species listed in database: 6774; hybrids: 10
= Asclepiadaceae Borkh.; Bot. Wörterb. 1: 31 (1797), nom. cons.
= Carissaceae Bertol; Nuovo Giorn. Bot. Ital. 23: 212 (1891)
= Cerberaceae Martinov; Tekhno-Bot. Slovar 119 (1820)
= Cynanchaceae G.Mey.; Chloris Han. 245, 251 (1836)
= Ophioxylaceae Mart.; Consp. Regn. Veg. [Martius] 24 (1835)
= Pacouriaceae Martinov; Tekhno-Bot. Slovar 447 (1820)
= Periplocaceae Schltr.; Nachtr. Fl. Schutzgeb. Südsee [Schumann & Lauterbach] 351 (1905), nom. cons.
= Plumeriaceae Horan.; Prim. Lin. Syst. Nat. 70 (1834)
= Stapeliaceae Horan.; Prim. Lin. Syst. Nat. 70 (1834)
= Vincaceae Vest; Anleit. Stud. Bot. 273, 299 (1818)
= Willughbeaceae J.Agardh; Theoria Syst. Pl. 256 (1858)
496.6348 Genus Rhytidocaulon P.R.O.Bally; Candollea 18: 335 (1963)
Distribution: 14 spp. E-Africa, Arabia
Species listed in database: 16
species :
Rhytidocaulon arachnoideum T.A.McCoy; Cact. Succ. J. (Los Angeles) 78(4): 183 (2006)
Distribution: NE-Somalia
24 SOM
Synonyms: hidden
= Ceropegia arachnifera Bruyns; S. African J. Bot. 112: 414 (2017), nom. nov.
species :
Rhytidocaulon baricum Thulin; Nordic J. Bot. 23(5): 533 (2005)
Distribution: NE-Somalia
24 SOM
Synonyms: hidden
= Ceropegia barica (Thulin) Bruyns; S. African J. Bot. 112: 414 (2017)
species :
Rhytidocaulon ciliatum Hanáček & Řičánek; Asklepios 80: 19 (2000)
Distribution: S-Yemen
35 YEM
Synonyms: hidden
= Ceropegia ciliatula Bruyns; S. African J. Bot. 112: 414 (2017), nom. nov.
species :
Rhytidocaulon elegantissimum Hanáček & Řičánek; Haseltonia 17: 97 (2012)
Distribution: Yemen
35 YEM
Synonyms: hidden
= Ceropegia elegantissima (Hanáček) Bruyns; S. African J. Bot. 112: 414 (2017)
species :
Rhytidocaulon fulleri Lavranos & Mortimer; Natl. Cact. Succ. J. 25: 3 (1970)
Distribution: Oman (Dhofar, Mascat & Oman)
35 OMA
Conservation Status: IUCN E
Synonyms: hidden
= Ceropegia fulleri (Lavranos & Mortimer) Bruyns; S. African J. Bot. 112: 414 (2017)
species :
Rhytidocaulon macrolobum Lavranos; Cact. Succ. J. (Los Angeles) 39: 3 (1967)
subspecies :
subsp. macrolobum
Distribution: Somalia; Saudi Arabia (Asir); Yemen (Aden Desert, N-Inner Yemen, SW-Yemen, W-Yemen)
24 SOM 35 SAU YEM
Synonyms: hidden
= Ceropegia macroloba (Lavranos) Bruyns; S. African J. Bot. 112: 415 (2017)
subspecies :
subsp. minimum Meve & Collen.; Edinburgh J. Bot. 56(1): 80 (1999)
Distribution: Saudi Arabia; Yemen
35 SAU YEM
Synonyms: hidden
= Ceropegia macroloba subsp. minima (Meve & Collen.) Bruyns; S. African J. Bot. 112: 415 (2017)
= Rhytidocaulon minimum (Meve & Collen.) T.A.McCoy & Plowes; Cact. Succ. J. (Los Angeles) 87(5): 226 (2015)
species :
Rhytidocaulon mccoyi Lavranos & Mies; Cact. Succ. J. (Los Angeles) 73(6): 299-303 (2001)
Distribution: S-Yemen
35 YEM
Synonyms: hidden
= Ceropegia maccoyiana Bruyns; S. African J. Bot. 112: 415 (2017), nom. nov.
species :
Rhytidocaulon molamatarense T.A.McCoy & Plowes; Cact. Succ. J. (Los Angeles) 87(5): 223 (2015)
Distribution: Saudi Arabia (Asir); Yemen
35 SAU YEM
Synonyms: hidden
= Ceropegia sheilae (D.V.Field) Bruyns; S. African J. Bot. 112: 415 (2017)
= Rhytidocaulon sheilae D.V.Field; Kew Bull. 36: 51, f. IA-F (1982)
species :
Rhytidocaulon paradoxum P.R.O.Bally; Candollea 18: 339 (1963)
Distribution: SE-Ethiopia; SW-Somalia; Kenya
24 ETH SOM 25 KEN
Remarks: only known from three collections
Conservation Status: IUCN I
Synonyms: hidden
= Ceropegia paradoxica Bruyns; S. African J. Bot. 112: 415 (2017), nom. nov.
species :
Rhytidocaulon piliferum Lavranos; Cact. Succ. J. (Los Angeles) 43(2): 62 (1971)
Distribution: Somalia (Somaliland)
24 SOM
Remarks: Only known from type collection
Synonyms: hidden
= Ceropegia pilulifera Bruyns; S. African J. Bot. 112: 415 (2017), nom. nov.
species :
Rhytidocaulon pseudosubscandens T.A.McCoy; Asklepios 96: 9 (2006)
Distribution: NE-Somalia
24 SOM
species :
Rhytidocaulon richardianum Lavranos; Cact. Succ. J. (Los Angeles) 63(4): 167 (1991)
Distribution: Somalia
24 SOM
Remarks: Only known from type collection
Synonyms: hidden
= Ceropegia richardiana (Lavranos) Bruyns; S. African J. Bot. 112: 415 (2017)
species :
Rhytidocaulon specksii T.A.McCoy; Kakteen And. Sukk. 56(10): 261 (2005)
Distribution: Somalia
24 SOM
Synonyms: hidden
= Ceropegia specksii (T.A.McCoy) Bruyns; S. African J. Bot. 112: 415 (2017)
species :
Rhytidocaulon splendidum T.A.McCoy; Cact. Succ. J. (Los Angeles) 75(4): 154 (2003)
Distribution: S-Yemen
35 YEM
Synonyms: hidden
= Ceropegia splendidior Bruyns; S. African J. Bot. 112: 415 (2017), nom. nov.
species :
Rhytidocaulon subscandens P.R.O.Bally; Candollea 18: 337 (1963)
Distribution: E-Ethiopia; Somalia (Somaliland)
24 ETH SOM
Synonyms: hidden
= Ceropegia subscandens (P.R.O.Bally) Bruyns; S. African J. Bot. 112: 415 (2017)
species :
Rhytidocaulon tortum (N.E.Br.) M.G.Gilbert; Bradleya 8: 29 (1990)
Distribution: S-Yemen
35 YEM
Synonyms: hidden
= Caralluma torta N.E.Br.; Bull. Misc. Inform. Kew 1901: 142 (1901)
= Ceropegia torta (N.E.Br.) Bruyns; S. African J. Bot. 112: 415 (2017)
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A complete, synonymic checklist of the Higher Plants of the World

Version 26.08 (August 2nd, 2026)

Covering 360,349 accepted species,
8,927 hybrids, 47,544 accepted infraspecific taxa and 1,011,667 synonyms,
in total 1,428,487* names

[*about 20,000 dubious, "unplaced" names and about 4,000 invalid names (Art. 24.3) like "typicus" are deliberately omitted]

With complete, detailed distribution data (countries and regions) and literature references

Arranged in linear phylogenetic sequence reflecting true relationships

Fully searchable and continously updated

With 38,209 pictures of 15,787 species

Assembled through 40 years independently from other databases

In cooperation with Catalogue of Life