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 348990) with original publication details: Iconogr. Bot. Pl. Crit. 9: 39 1831.
This name was in version 1 of The Plant List, record kew-348990, and has not been changed.