This name is a synonym of Sparganium × splendens Meinsh..
The record derives from WCSP
(data supplied on 2012-03-26)
which reports it as a synonym (record 266169) with original publication details: Syn. Mitteleur. Fl. 1: 285 1897.
This name was in version 1 of The Plant List, record kew-266169, and has not been changed.