This name is a synonym of Egeria najas Planch..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 309461) with original publication details: Revista Sudamer. Bot. 6: 134 1940.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:90085-2.
This name was in version 1 of The Plant List, record kew-309461, and has not been changed.