This name is a synonym of Carex krausei subsp. porsildiana (Polunin) Á.Löve, D.Löve & Raymond.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 225321) with original publication details: J. Linn. Soc., Bot. 52: 373 1943.
This name was in version 1 of The Plant List, record kew-225321, and has not been changed.