This name is a synonym of Elymus mutabilis (Drobow) Tzvelev.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 411389) with original publication details: Novosti Sist. Vyssh. Rast. 12: 94 1975.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:882019-1.
This name was in version 1 of The Plant List, record kew-411389.