This name is a synonym of Centaurea achaia Boiss. & Heldr..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 63BC2A99-2905-43A0-BBC8-02E32FF16374).
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 Centaurea achaia in version 1 of The Plant List.