This name is a synonym of Batrachium foeniculaceum (Gilib.) Krecz..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 27104005) with original publication details: Fl. Lit. Inch. 5: 261 1782.
This name was in version 1 of The Plant List, record tro-27104005.