This name is a synonym of Callitriche hamulata Kütz. ex W.D.J.Koch.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 31549) with original publication details: Butl. Inst. Catalana Hist. Nat., Secc. Bot. 38(1): 85 1974.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:875463-1.
This name was in version 1 of The Plant List, record kew-31549.