This name is a synonym of Pickeringia montana Torr. & A.Gray.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 13012440) with original publication details: Ill. Fl. Pacific States 2: 483 1944.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:195916-2.
This name was in version 1 of The Plant List, record tro-13012440, and has not been changed.