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 89D95C5D-117D-4F8A-AB33-DDCF24B50B0D) with original publication details: 186 1871.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:14663-2.
This name was in version 1 of The Plant List, record gcc-68306.