This name is a synonym of Helictotrichon quinquesetum (Steud.) Schweick..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 397843) with original publication details: Flora 12: 485 1829.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:391715-1.
This name was in version 1 of The Plant List, record kew-397843, and has not been changed.