This name is a synonym of Fimbristylis vaginata (R.Br.) Domin.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an illegitimate name (record 245318) with original publication details: Fl. Austral. 7: 308 1878.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:307746-1.
This name was in version 1 of The Plant List, record kew-245318, and has not been changed.