This name is a synonym of Hordeum flexuosum Steud..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 419483) with original publication details: in Fl. Prov. Buenos Aires 4(2): 184 1970.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:123935-2.
This name was in version 1 of The Plant List, record kew-419483, and has not been changed.