This name is a synonym of Carex breviculmis var. fibrillosa (Franch. & Sav.) Matsum. & Hayata.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 228129) with original publication details: in Fl. Tsinlingensis 1(1): 249 1976.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:879543-1.
This name was in version 1 of The Plant List, record kew-228129, and has not been changed.