This name is a synonym of Antennaria pulcherrima subsp. eucosma (Fernald & Wiegand) R.J.Bayer.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record B7EEFE13-AC1E-45A4-B81A-9F904A047265) with original publication details: Rhodora 13 23 1911.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:14677-2.
This name was in version 1 of The Plant List, record gcc-102628.