This name is a synonym of Helictotrichon marginatum (Lowe) Röser.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 398027) with original publication details: Elench. Pl. Nov. 88 1838.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:927826-1.
This name was in version 1 of The Plant List, record kew-398027.