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 and as an illegitimate name (record 397693) with original publication details: Hist. Pl. Dauphiné 2: 151 1787.
This name was in version 1 of The Plant List, record kew-397693.