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 990FAA3B-6353-46DA-BD83-E6486E2FF52A) with original publication details: Ottawa Naturalist 17 201 1904.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:14874-2.
This name was in version 1 of The Plant List, record gcc-133776.