Louis, J. & Leonard, J. (1948) Olacaceae Flore du Congo Belge et du Ruanda-Urundi Volume I 249-278
| Species | FZ divisions | Content |
| afra Sond. var. afra | N,Z,T,MS,GI,M | Description, Image |
| afra Sond. var. natalensis Sond. | N,Z | Description |
| americana L. var. microphylla Welw. ex Oliv. | N,Z,T,MS,GI,M | Description, Image |