This name is a synonym of Brassica nigra (L.) K.Koch.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Exkurs.-Fl. Bayern 222 1884.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:289575-1.
This name was in version 1 of The Plant List, record kew-2474912.