This name is a synonym of Descurainia longepedicellata (E. Fourn.) O.E. Schulz.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50128381) 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:120865-2.
This name was in version 1 of The Plant List, record tro-50128381.