This name is a synonym of Antennaria howellii subsp. petaloidea R.J.Bayer.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 90AF0C2D-D128-4E38-8536-7DE9C5194075) with original publication details: Rhodora 23 295 1922.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:14594-2.
This name was in version 1 of The Plant List, record gcc-87734.