This name is a synonym of Sparganium stoloniferum (Buch.-Ham. ex Graebn.) Buch.-Ham. ex Juz..
The record derives from WCSP
(data supplied on 2012-03-26)
which reports it as a synonym and as an invalid name (record 266031) with original publication details: Proc. Linn. Soc. London 1: 18 1839.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:836752-1.
This name was in version 1 of The Plant List, record kew-266031.