The present paper is the first of a series of publications dealing with African Dichapetalaceae, which finally will lead to a complete revision of the family as represented in Africa including Madagascar. For several local or regional floras revisions already have been made, but a critical revision covering the total area has never been undertaken. The Asiatic, Australian, and Melanesian species have been revised by Leenhouts (1956) and a revision of the American species is in preparation by G.T. Prance at the New York Botanical Garden.