This name is a synonym of Sagittaria subulata (L.) Buchenau.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 287417) with original publication details: Gen. N. Amer. Pl. 2: 213 1818.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:58557-1.
This name was in version 1 of The Plant List, record kew-287417.