This name is a synonym of Brassica juncea (L.) Czern..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 100360319) with original publication details: Reg. Veg. Syst. Nat. 2: 616. 1821.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:289091-1.
This name was in version 1 of The Plant List, record tro-100360319.