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 266077) with original publication details: Bot. Not. 1854: 136 1854.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:836762-1.
This name was in version 1 of The Plant List, record kew-266077, and has not been changed.