This name is a synonym of Brassica repanda subsp. cantabrica (Font Quer) Heywood.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Cavanillesia 7: 73 1935.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:60432368-2.
This name was in version 1 of The Plant List, record kew-2682788, and has not been changed.