This name is a synonym of Callitriche occidentalis Hegelm..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 31630) with original publication details: Verh. Bot. Vereins Prov. Brandenburg 10: 113 1868.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:430019-1.
This name was in version 1 of The Plant List, record kew-31630, and has not been changed.