This name is a synonym of Brassica oxyrrhina Coss..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Index Seminum (LE) 1856: 34 1857.
This name was in version 1 of The Plant List, record kew-2682019, and has not been changed.