This name is a synonym of Callitriche lenisulca Clavaud.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 31518) with original publication details: Fl. France 12: 184 1910.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:139155-1.
This name was in version 1 of The Plant List, record kew-31518, and has not been changed.