Physostigma

Physostigma is a genus of flowering plants in the family Fabaceae. It includes five species of erect or climbing herbs and subshrubs native to sub-Saharan Africa. They grow in tropical swamp and riverine vegetation and seasonally-dry forest, open woodland, and grassland in the Guineo-Congolian and Zambezian regions. The genus belongs to subfamily Faboideae.

Species in the genus include:
 * Physostigma coriaceum Merxm.
 * Physostigma cylindrospermum (Welw. ex Baker) Holmes
 * Physostigma laxius Merxm.
 * Physostigma mesoponticum Taub.
 * Physostigma venenosum Balf.