This name is a synonym of Cabomba caroliniana var. pulcherrima R.M.Harper.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 28295) with original publication details: Castanea 18: 121 1953.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:39042-2.
This name was in version 1 of The Plant List, record kew-28295, and has not been changed.