This name is a synonym of Calamagrostis canescens (Weber) Roth.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 402529) with original publication details: Acta Bot. Acad. Sci. Hung. 17: 122 1971 publ. 1972.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:881705-1.
This name was in version 1 of The Plant List, record kew-402529.