This name is a synonym of Brassica bourgeaui (Webb ex Christ) Kuntze.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 100360803) with original publication details: Bot. Jahrb. Syst. 9: 89. 1888.
This name was in version 1 of The Plant List, record tro-100360803.