The flowers of this blue pigment rich vine have the shape of human female genitals, hence the Latin name of the genus "Clitoria", from "clitoris".

Syrian Rue (Peganum harmala) is thought to have been traditionally used. (Stafford, 1995) This species belongs to the Zygophyllaceae family. Seeds from the Syrian Rue contain compounds known as harmala alkaloids.

Pterocarpus soyauxii is a useful multipurpose tree from forested areas in Central Africa, producing good-quality timber, dye, and has traditionally been used as a medicine.