This name is a synonym of Spartina alterniflora Loisel..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an invalid name (record 439676) with original publication details: Nomencl. Bot. ed. 2, 2: 474 1841.
This name was in version 1 of The Plant List, record kew-439676.