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 22600262) with original publication details: Deutschl. Fl. 1(1): 241 1800.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:605676-1.
This name was in version 1 of The Plant List, record tro-22600262.