This name is a synonym of Sisymbrium heteromallum C.A. Mey..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 4106106) with original publication details: Rev. Gén. Bot. 934 1891.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:284940-1.
This name was in version 1 of The Plant List, record tro-4106106.