This name is a synonym of Antennaria umbrinella Rydb..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record F591345E-0CA7-47F1-BCDC-4ADF09606724) with original publication details: Pittonia 3 283 1898.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:14561-2.
This name was in version 1 of The Plant List, record gcc-40395, and has not been changed.