This name is a synonym of Callitriche sonderi Hegelm..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 31551) with original publication details: Austral. J. Bot. 7: 307 1959.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:139165-1.
This name was in version 1 of The Plant List, record kew-31551, and has not been changed.