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 397677) with original publication details: Trans. Cambridge Philos. Soc. 6(3): 529 1838.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:391576-1.
This name was in version 1 of The Plant List, record kew-397677.