Piaranthus

Piaranthus is a genus of plants in the Apocynaceae, first described in 1810. It is native to southern Africa.

species transferred to other genera (Caralluma, Hoodia, Huerniopsis, Quaqua, Stisseria)

Phylogenetic studies have shown the genus to be monophyletic, and to be very closely related to the Orbea and Stapelia genera. More distantly related are the Huernia and Tavaresia genera.