This name is a synonym of Centaurea × grosii Font Quer.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 09CEC1C9-CE61-4855-A43B-710B49EE79C8) with original publication details: 82 1935.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:190602-1.
This name was in version 1 of The Plant List, record gcc-81994, and has not been changed.