This name is a synonym of Achillea millefolium L..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 21EDAC65-7EBB-4422-BA7B-B0FFF81D07DE) with original publication details: Canad. Field-Naturalist 65 12 1951.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:303310-2.
This name was in version 1 of The Plant List, record gcc-110491.