This name is a synonym of Brassica repanda subsp. turbonis (P.Monts.) J.M.Monts. & Romo.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Itinera Geobot. 5: 64 1991.
This name was in version 1 of The Plant List, record kew-2682855.