This name is a synonym of Helictotrichon filifolium (Lag.) Henrard.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 25560013) with original publication details: Iconogr. Fl. Ital. (ed. 2) 32 1921.
This name was in version 1 of The Plant List, record tro-25560013, and has not been changed.