This name is a synonym of Agropyron fragile (Roth) P.Candargy.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 388350) with original publication details: Vasc. Pl. Wyoming 298 1988.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:271879-2.
This name was in version 1 of The Plant List, record kew-388350.