This name is a synonym of Achillea setacea Sultwein..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record E0230B4D-416E-4886-BBED-B5BA3B0BB387).
This name record (from TICA) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Achillea setacea in version 1 of The Plant List.