This name is a synonym of Leymus innovatus (Beal) Pilg..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 411249) with original publication details: Canad. J. Bot. 42: 597 1964.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:90272-2.
This name was in version 1 of The Plant List, record kew-411249.