This name is a synonym of Dieteria bigelovii (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 B940E0B9-DC58-48EC-8485-6A0FADE93A3B) with original publication details: Proc. Amer. Acad. Arts 13 1878.
This name was in version 1 of The Plant List, record gcc-78823.