Bambara people
Vigna subterranea (also known by its common names: Bambara groundnut, Bambara nut, Bambara bean, Congo goober, earth pea, ground-bean, or hog-peanut) is a member of the family Fabaceae. The plant originated in West Africa (the Bambara people are found in southern Mali, Guinea, Burkina Faso and Senegal). "Vigna subterranea" ripens its pods underground, much like the peanut (also called a "groundnut"). They can be eaten fresh or boiled after drying, they can be ground either fresh or dry to make puddings popularly known as Okpa in Nigeria.