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 14DFC047-B6C7-4D1E-AF56-AC5C9BDEFB0A) with original publication details: Syst. Bot. 7 310 1982.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:920513-1.
This name was in version 1 of The Plant List, record gcc-62150.