This name is a synonym of Carex unilateralis Mack..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 224714) with original publication details: Phytologia 43: 55 1979.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:45793-2.
This name was in version 1 of The Plant List, record kew-224714, and has not been changed.