This name is a synonym of Dieteria canescens (Pursh) Nutt..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym and as an illegitimate name (record 278A5F79-4EB4-4D84-AB83-8E8DBDE7DBE4) with original publication details: 155 1818.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:180778-1.
This name was in version 1 of The Plant List, record gcc-95111.