This name is a synonym of Carex ferruginea subsp. macrostachys (Bertol.) Arcang..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 341551) with original publication details: Consp. Fl. Eur. 772 1882.
This name was in version 1 of The Plant List, record kew-341551, and has not been changed.