This name is a synonym of Sparganium gramineum Georgi.
The record derives from WCSP
(data supplied on 2012-03-26)
which reports it as a synonym (record 266090) with original publication details: Bemerk. Reise 1: 233 1775.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:836769-1.
This name was in version 1 of The Plant List, record kew-266090, and has not been changed.