This name is a synonym of Sagittaria montevidensis Cham. & Schltdl..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 292734) with original publication details: Revis. Gen. Pl. 3(2): 328 1898.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:225331-2.
This name was in version 1 of The Plant List, record kew-292734.