This name is a synonym of × Festulolium loliaceum (Huds.) P.Fourn..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 399955) with original publication details: Hort. Berol. 1: 42 1827.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:393137-1.
This name was in version 1 of The Plant List, record kew-399955.