This name is a synonym of Desmodium molliculum (Kunth) DC..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 13018469) with original publication details: Hort. Brit. 479 1826.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:491913-1.
This name was in version 1 of The Plant List, record tro-13018469, and has not been changed.