This legume contains more oil than most. Peanut oil is widely used in West Africa and in France. Usually used to fondue because of its higher temperature properties. The fruits are borne under the ground. Much U.S. production goes into peanut butter.
Aflatoxin is a major problem.
The sticky pulp has a sour taste and is the part used. They are used in many types of sauces. See diagram pg. The fruits have long been used to feed livestock. Many of the pods eaten formerly in Argentina and Chile.