This name is a synonym of Descurainia myriophylla (Willd.) R.E.Fr..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 100360353) with original publication details: Revis. Gen. Pl. 3(2): 5. 1898.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:120845-2.
This name was in version 1 of The Plant List, record tro-100360353, and has not been changed.