The record derives from WCSP
(data supplied on )
which reports it as a synonym and as an illegitimate name (record
459498) with original publication details: Abh. Naturwiss. Vereins Bremen 10: 505 1889.
Full publication details for this name can be found in IPNI:
This name record (from WCSP) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Sparganium simplex in version 1 of The Plant List.