This name is a synonym of Sagittaria demersa J.G.Sm..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 287463) with original publication details: Fl. Mexic. ed. 2: 218 1894.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:225369-2.
This name was in version 1 of The Plant List, record kew-287463, and has not been changed.