This name is a synonym of Nymphaea stuhlmannii (Engl.) Schweinf. & Gilg.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50211425) with original publication details: Pflanzenw. Ost-Afrikas C: 178 1895.
This name was in version 1 of The Plant List, record tro-50211425, and has not been changed.