Echidnopsis is a genus of succulent, cactus-like plants in the family Apocynaceae, first described as a genus in 1871.[1] They are native to eastern Africa and the Arabian Peninsula.[2][3]
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.[5]