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 397696) with original publication details: Syn. Mitteleur. Fl. 2(1): 249 1898.
This name was in version 1 of The Plant List, record kew-397696.