''Echidnopsis'' is a genus of succulent, cactus-like plants in the family Apocynaceae, first described as a genus in 1871. They are native to eastern Africa and the

Arabian Peninsula The Arabian Peninsula, (; ar, شِبْهُ الْجَزِيرَةِ الْعَرَبِيَّة, , "Arabian Peninsula" or , , "Island of the Arabs") or Arabia, is a peninsula of Western Asia, situated northeast of Africa on the Arabian Plate ...

. ;Accepted speciesThe Plant List, genus ''Echidnopsis''
/ref> ;Species formerly included ''Echidnopsis quadrangula'' now '' Caralluma quadrangula'' ;Taxonomy Phylogenetic studies have shown the genus to be monophyletic, and most closely related to the genus ''

Rhytidocaulon Rhytidocaulon is a plant genus in the family Apocynaceae, first described in 1962. It is native to northeastern Africa and the Arabian Peninsula ;Species # '' Rhytidocaulon paradoxum'' P.R.O.Bally - Ethiopia # '' Rhytidocaulon piliferum'' Lavra ...

''. Marginally more distantly related is a sister branch comprising the genus ''

Pseudolithos ''Pseudolithos'' is a genus of succulent flowering plants of the family Apocynaceae, indigenous to arid areas of Somalia, Yemen and Oman. Description and naming The plants were first described as a genus in 1965; the name ''"Pseudo-lithos"'' me ...

'' and the widespread '' Caralluma'' stapeliads of North Africa.P. Bruyns, C. Klak, P. Hanacek: ''Evolution of the stapeliads (Apocynaceae-Asclepiadoideae) - repeated major radiation across Africa in an Old World group. Molecular Phylogenetics and Evolution.'' 2014. v. 77, no. 1, p. 251--263. ISSN 1055-7903.

References

* * {{Taxonbar, from=Q289096 Apocynaceae genera Asclepiadoideae Taxa named by Joseph Dalton Hooker