This name is a synonym of Medicago retrorsa (Boiss.) E.Small.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 13034473) with original publication details: Fl. Orient. 2: 78 1872.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:524083-1.
This name was in version 1 of The Plant List, record tro-13034473, and has not been changed.