This name is a synonym of Callitriche platycarpa Kütz..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 31586) with original publication details: Bull. Soc. Bot. France 88: 242 1941.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:139173-1.
This name was in version 1 of The Plant List, record kew-31586, and has not been changed.