This name is a synonym of Helictotrichon scabrivalve (Trin.) G.C.Tucker.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 391676) with original publication details: Amer. J. Bot. 18: 413 1931.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:11517-2.
This name was in version 1 of The Plant List, record kew-391676.