This name is a synonym of Carex flacca subsp. erythrostachys (Hoppe) Holub.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 226125) with original publication details: Inst. Rei Herb. 1: 405 1766.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:299511-1.
This name was in version 1 of The Plant List, record kew-226125.