This name is a synonym of Callitriche marginata Torr..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 31676) with original publication details: Proc. Amer. Acad. Arts 14: 298 1879.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:430041-1.
This name was in version 1 of The Plant List, record kew-31676, and has not been changed.