This name is a synonym of Carex umbrosa subsp. sabynensis (Less. ex Kunth) Kük..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 225087) with original publication details: Kongl. Svenska Vetensk. Acad. Handl. n.s., 22(10): 178 1888.
This name was in version 1 of The Plant List, record kew-225087, and has not been changed.