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 292840) with original publication details: Rhodora 42: 409 1940.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:225362-2.
This name was in version 1 of The Plant List, record kew-292840.