This name is a synonym of Dieteria canescens var. leucanthemifolia (Greene) D.R.Morgan & R.L.Hartm..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 89242199-A2E8-4268-81F9-79AE35807520) with original publication details: Erythea 3 119 1895.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:23671-2.
This name was in version 1 of The Plant List, record gcc-85888, and has not been changed.