This name is a synonym of Nuphar pumila (Timm) DC..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Manual ed. 5: 57 1867.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:171081-2.
This name was in version 1 of The Plant List, record kew-2385512.