This name is a synonym of Festuca diffusa Dumort..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 416633) with original publication details: Sched. Crit. 34 1822.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:60443329-2.
This name was in version 1 of The Plant List, record kew-416633.