This name is a synonym of Antennaria howellii subsp. canadensis (Greene) R.J.Bayer.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 2D811A66-ED02-46B2-BFC7-9EFF76FF18C9) with original publication details: Rhodora 16 196 1914.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:14871-2.
This name was in version 1 of The Plant List, record gcc-102385.