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 A3A5E6A5-A789-4EDF-8366-A966F641EBD7) with original publication details: Bot. Gaz. 27 208-209 1899.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:14846-2.
This name was in version 1 of The Plant List, record gcc-107133, and has not been changed.