This name is a synonym of Hydrilla verticillata (L.f.) Royle.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 309480) with original publication details: Key Vict. Pl. 1: 423 1888.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:431734-1.
This name was in version 1 of The Plant List, record kew-309480.