This name is a synonym of Achillea alexandri-regis Bornm. & Rudsky.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 58B276A9-4330-471F-A315-53B08CD34C7D).
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 alexandri-regis in version 1 of The Plant List.