This name is a synonym of Calamagrostis purpurascens R.Br..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 407675) with original publication details: Rhodora 45: 414 1943.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:78088-2.
This name was in version 1 of The Plant List, record kew-407675.