This name is a synonym of Nuphar pumila (Timm) DC..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 22600264) with original publication details: Sp. Pl. 2(2): 1151 1799.
This name was in version 1 of The Plant List, record tro-22600264.