This name is a synonym of Carex fecunda var. atropurpurea (Boeckeler) J.F.Macbr..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an illegitimate name (record 224789) with original publication details: Linnaea 39: 150 1875.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:298709-1.
This name was in version 1 of The Plant List, record kew-224789, and has not been changed.