This name is a synonym of Poa supina Schrad..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 437431) with original publication details: Poa France Belgique Suisse 161 2005.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:77067148-1.
This name was in version 1 of The Plant List, record kew-437431.