This name is a synonym of Callitriche heterophylla var. bolanderi (Hegelm.) Fassett.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 31600) with original publication details: Canad. J. Bot. 43: 1395 1963.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:42497-2.
This name was in version 1 of The Plant List, record kew-31600, and has not been changed.