This name is a synonym of Helictotrichon sedenense (DC.) Holub.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 397919) with original publication details: Fl. Franç. ed. 3, 3: 719 1805.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:391741-1.
This name was in version 1 of The Plant List, record kew-397919.