This name is a synonym of Achillea salicifolia subsp. septentrionalis (Serg.) Uotila.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 34697D2E-1467-4B0C-AE94-D3AC6B749BC0) with original publication details: 115 1961.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:174254-1.
This name was in version 1 of The Plant List, record gcc-125718.