This name is a synonym of Carex bigelowii subsp. dacica (Heuff.) T.V.Egorova.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 330742) with original publication details: Naturaliste Canad. 77: 57 1950.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:45856-2.
This name was in version 1 of The Plant List, record kew-330742.