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 and as a spelling variant with original publication details: Index Seminum (LE) 1856: 34 1856.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:279441-1.
This name was in version 1 of The Plant List, record kew-2682598, and has not been changed.