This name is a synonym of Calamagrostis inexpansa A.Gray.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an illegitimate name (record 403302) with original publication details: Contr. U. S. Natl. Herb. 1: 249 1892.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:394788-1.
This name was in version 1 of The Plant List, record kew-403302.