This name is a synonym of Desmodium painteri (Rose & J.H.Painter) Standl..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 13016000) with original publication details: Contr. U.S. Natl. Herb. 16(5): 214, pl. 51a 1913.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:156033-2.
This name was in version 1 of The Plant List, record tro-13016000, and has not been changed.