This name is a synonym of Alisma gramineum Lej..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 294839) with original publication details: Verh. Bot. Vereins Prov. Brandenburg 3(4): 164 1861.
This name was in version 1 of The Plant List, record kew-294839.