This name is a synonym of Leymus mollis (Trin.) Pilg..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 411364) with original publication details: Neue Entdeck. Pflanzenk. 2: 72 1821.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:400348-1.
This name was in version 1 of The Plant List, record kew-411364.