This name is a synonym of Achillea falcata L..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 152798F0-666F-45A5-87B8-9B912C323AEA).
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 sulphurea in version 1 of The Plant List.