This name is a synonym of Callitriche hamulata Kütz. ex W.D.J.Koch.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 31587) with original publication details: Taschenb. Schweiz. Bot. 243 1869.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:429999-1.
This name was in version 1 of The Plant List, record kew-31587.