This name is a synonym of Sparganium natans L..
The record derives from WCSP
(data supplied on 2012-03-26)
which reports it as a synonym and as an illegitimate name (record 266100) with original publication details: Summa Veg. Scand. 2: 560 1849.
This name was in version 1 of The Plant List, record kew-266100.