This name is a synonym of Castilleja pallida var. yukonis (Pennell) J.M.Egger.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Proc. Acad. Nat. Sci. Philadelphia 86: 531 1934.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:49782-2.
This name was in version 1 of The Plant List, record kew-2705405.