This name is a synonym of Callitriche stagnalis Scop..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 31711) with original publication details: Fl. Pis. 1: 4 1798.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:430062-1.
This name was in version 1 of The Plant List, record kew-31711.