This name is a synonym of Elymus magellanicus (Desv.) Á.Löve.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 411183) with original publication details: Pl. Syst. Evol. 166: 99 1989.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:941190-1.
This name was in version 1 of The Plant List, record kew-411183.