This name is a synonym of Antennaria dimorpha (Nutt.) Torr. & A.Gray.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record D145C475-BF63-40EC-859F-57EF9F195EED) with original publication details: Fl. Rocky Mts. 921 1917.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:14735-2.
This name was in version 1 of The Plant List, record gcc-47462.