This name is a synonym of Jacobaea aquatica (Hill) "G.Gaertn., B.Mey. & Scherb.".
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record B92EE3B6-02F0-44FE-9BA7-4AF876DC4CB5) with original publication details: 120 1761.
This name was in version 1 of The Plant List, record gcc-40456.