This name is a synonym of Dieteria canescens var. shastensis (A.Gray) D.R.Morgan & R.L.Hartm..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record D0E405B1-0392-42F6-968B-86F2E1E0A7AD) with original publication details: Northw. Fl. 384 1912.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:181151-1.
This name was in version 1 of The Plant List, record gcc-91712.