This name is a synonym of Rhynchospora contracta (Nees) J.Raynal.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an invalid name (record 265530) with original publication details: Syst. Veg. 3: 831 1826.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:230693-2.
This name was in version 1 of The Plant List, record kew-265530.