This name is a synonym of Nymphaea nouchali var. caerulea (Savigny) Verdc..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Dec. Egypt. 1: 74 1798.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:605514-1.
This name was in version 1 of The Plant List, record kew-2384860.