This name is a synonym of Carex macrorrhiza Boeckeler.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 225815) with original publication details: Beitr. Cyper. 1: 41 1888.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:46041-2.
This name was in version 1 of The Plant List, record kew-225815.