This name is a synonym of Achillea leptophylla M.Bieb..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 2AE2185D-5E16-4BC4-9509-A4693139D9BB).
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 spithamea in version 1 of The Plant List.