This name is a synonym of Centaurea pallescens Delile.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 2D44A4D9-836D-4CEA-99BA-8C14D9336C57).
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 pallescens in version 1 of The Plant List.