This name is a synonym of Calamagrostis epigejos (L.) Roth.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 402650) with original publication details: Novosti Sist. Vyssh. Rast. 2: 1 1965.
This name was in version 1 of The Plant List, record kew-402650.