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 274721) with original publication details: Amer. Midl. Naturalist 4: 163 1915.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:8478-2.
This name was in version 1 of The Plant List, record kew-274721.