Robbrecht (Verdc.) 1975 - Robbrecht E (1975) Hymenocoleus, a New Genus of Psychotrieae (Rubiaceae) from Tropical Africa. Bulletin Du Jardin Botanique National De Belgique 45: 273-300. doi: 10.2307/3667482.
There is no corrections for Hymenocoleus neurodictyon var. orientalis yet.