Psoralea is a genus in the legume family, Fabaceae. Although most species are poisonous, the starchy roots of P. esculenta (breadroot, tipsin, or prairie turnip) and P. hypogaea are edible. A few species form tumbleweeds. The South African species are mostly shrubs or small trees. Leaves 3-foliolate or pinnate, sometimes reduced, dotted with black or red glands, stipules clasping the stem and joined to the base of the petiole. Flowers in groups of 1-5, each subtended by a lobed cupule that is itself subtended by two bracts. All of the 50 Southern African species are fynbos.

Psoralea affinis is a South African endemic species from the Eastern Cape and Western Cape Provinces. It grows into a slender erect shrub of up to 3 meters tall. It has 5-9 foliate leaves. During spring it bears eye-catching blue to purple flowers.