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 402647) with original publication details: Exsicc. (Pl. Finland.) 2: 15 1916.
This name was in version 1 of The Plant List, record kew-402647.