This name is a synonym of Elymus multisetus (J.G.Sm.) Burtt Davy.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 443151) with original publication details: Bot. Gaz. 36: 59 1903.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:237861-2.
This name was in version 1 of The Plant List, record kew-443151.