This name is a synonym of Descurainia hartwegiana (E.Fourn.) Britton.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 100359968) with original publication details: Revis. Gen. Pl. 2: 934. 1891.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:120852-2.
This name was in version 1 of The Plant List, record tro-100359968, and has not been changed.