This name is a synonym of Centaurea monticola subsp. orthoacantha (Pau & Font Quer) Ibn Tattou.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 360BCC5C-F1ED-4CCE-9DE8-A35F6D7852AF) with original publication details: Iter Marocc. 1930: 701 (1932) 701 1932.
This name was in version 1 of The Plant List, record gcc-61044, and has not been changed.