This name is a synonym of Glyceria fluitans (L.) R.Br..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 427003) with original publication details: Bull. Torrey Bot. Club 24: 349 1897.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:181413-2.
This name was in version 1 of The Plant List, record kew-427003.