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 410905) with original publication details: Pl. Labrador. 20 1830.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:90191-2.
This name was in version 1 of The Plant List, record kew-410905.