This name is a synonym of Helictotrichon pruinosum (Batt. & Trab.) Henrard.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 397818) with original publication details: Bull. Soc. Bot. France 36: 411 1890.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:391697-1.
This name was in version 1 of The Plant List, record kew-397818.