This name is a synonym of Calamagrostis sesquiflora (Trin.) Tzvelev.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 397933) with original publication details: Fl. Ross. 4: 419 1852.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:391752-1.
This name was in version 1 of The Plant List, record kew-397933.