''Echidnopsis'' is a genus of succulent, cactus-like plants in the family

Apocynaceae Apocynaceae (, from '' Apocynum'', Greek for "dog-away") is a family of flowering plants that includes trees, shrubs, herbs, stem succulents, and vines, commonly known as the dogbane family, because some taxa were used as dog poison. Notable mem ...

, first described as a genus in 1871. They are native to eastern

Africa Africa is the world's second-largest and second-most populous continent after Asia. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth's land area and 6% of its total surfac ...

and the

Arabian Peninsula The Arabian Peninsula (, , or , , ) or Arabia, is a peninsula in West Asia, situated north-east of Africa on the Arabian plate. At , comparable in size to India, the Arabian Peninsula is the largest peninsula in the world. Geographically, the ...

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