This name is a synonym of Desmodium barbatum var. argyreum (Welw. ex Baker) B.G. Schub..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 13076165) with original publication details: Fl. Trop. Afr. 2: 161 1871.
This name was in version 1 of The Plant List, record tro-13076165, and has not been changed.