This name is a synonym of Callitriche terrestris Raf..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 330579) with original publication details: State New York, Commun. 50: 136 1841.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:42527-2.
This name was in version 1 of The Plant List, record kew-330579.