This name is a synonym of Carex bigelowii subsp. lugens (Holm) T.V.Egorova.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 225667) with original publication details: Amer. J. Sci. IV, 16: 457 1903.
This name was in version 1 of The Plant List, record kew-225667.