This name is a synonym of Callitriche muelleri Sond..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 31631) with original publication details: Trans. & Proc. New Zealand Inst. 20: 190 1887 publ. 1888.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:430020-1.
This name was in version 1 of The Plant List, record kew-31631, and has not been changed.