This name is a synonym of Alisma gramineum Lej..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 900179) with original publication details: Fl. Franç. (ed. 3) 3: 189 1815.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:8491-2.
This name was in version 1 of The Plant List, record tro-900179.