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 50232211) with original publication details: Syst. Nat. (ed. 12) 2: 445 1767.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:324687-2.
This name was in version 1 of The Plant List, record tro-50232211.