This name is a synonym of Sinapis alba subsp. dissecta (Lag.) Simonk..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Voy. Bot. Espagne 1: 40 1839.
This name was in version 1 of The Plant List, record kew-2682184, and has not been changed.