This name is a synonym of Carex yamatsutana Ohwi.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 226049) with original publication details: Fl. URSS 3: 590 1935.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:299475-1.
This name was in version 1 of The Plant List, record kew-226049, and has not been changed.