This name is a synonym of Desmodium canescens var. hirsutum (Hook.) B.L. Rob..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 13017615) with original publication details: Companion Bot. Mag. 1(1): 23 1835.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:78385-2.
This name was in version 1 of The Plant List, record tro-13017615.