This name is a synonym of Carex lenticularis Michx..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 224376) with original publication details: J. Fac. Agr. Hokkaido Imp. Univ. Sapporo 36: 105 1934.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:298489-1.
This name was in version 1 of The Plant List, record kew-224376.