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: Ann. Sci. Acad. Polytecn. Porto 14: 148 1921.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:279268-1.
This name was in version 1 of The Plant List, record kew-2682043, and has not been changed.