Verdc. (Bak.) 1971 - Verdcourt B (1971) Studies in the Leguminosae-Papilionoïdeae for the 'Flora of Tropical East Africa': V. Kew Bulletin 25(1): 65-169. doi: 10.2307/4103150.
There is no corrections for Rhynchosia velutina var. discolor yet.