This name is a synonym of Elymus caninus (L.) L..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 25541810) with original publication details: Watsonia 14(4): 392 1983.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:922075-1.
This name was in version 1 of The Plant List, record tro-25541810.