This name is a synonym of Dieteria canescens var. glabra (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 B8A0682B-75ED-4F9F-A29F-1A6D2469EA01) with original publication details: Rhodora 38 407 1936.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23691-2.
This name was in version 1 of The Plant List, record gcc-14245, and has not been changed.