This name is a synonym of Erysimum menziesii (Hook.) Wettst..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50129154) with original publication details: Fl. Bor.-Amer. 1(2): 60 1830.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:120871-2.
This name was in version 1 of The Plant List, record tro-50129154, and has not been changed.