This name is a synonym of Sparganium emersum Rehmann.
The record derives from WCSP
(data supplied on 2012-03-26)
which reports it as a synonym (record 266094) with original publication details: Excursionsfl. Oesterreich ed. 2: 29 1909.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:821835-1.
This name was in version 1 of The Plant List, record kew-266094.