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 (record 217276) with original publication details: Prodr. Fl. Nov. Holl. 229 1810.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:297831-1.
This name was in version 1 of The Plant List, record kew-217276, and has not been changed.