This name is a synonym of Medicago cretacea M.Bieb..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 13057067) with original publication details: Fl. URSS 11: 120 1945.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:523927-1.
This name was in version 1 of The Plant List, record tro-13057067, and has not been changed.