This name is a synonym of Nymphoides geminata (R.Br.) Kuntze.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50249846) with original publication details: Prodr. 1: 457 1810.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:371389-1.
This name was in version 1 of The Plant List, record tro-50249846.