This name is a synonym of Helictotrichon longum (Stapf) Schweick..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 397648) with original publication details: Bull. Misc. Inform. Kew 1897: 292 1897.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:391547-1.
This name was in version 1 of The Plant List, record kew-397648, and has not been changed.