This name is a synonym of Brassica insularis Moris.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Oesterr. Bot. Z. 82: 315 1933.
This name was in version 1 of The Plant List, record kew-2682162, and has not been changed.