This name is a synonym of Festuca arundinacea Schreb..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 414521) with original publication details: Bull. Soc. Échange Pl. Vasc. Eur. Occid. Bassin Médit. 16: 142 1976.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:882120-1.
This name was in version 1 of The Plant List, record kew-414521.