This name is a synonym of Elymus angulatus J.Presl.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 410841) with original publication details: Anales Soc. Ci. Argent. 86: 79 1918.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:90165-2.
This name was in version 1 of The Plant List, record kew-410841.