This name is a synonym of Centaurea phrygia subsp. indurata (Janka) Stoj. & Acht..
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 0FDCAE5B-30F7-4D00-B03B-3B6F0507704F) with original publication details: 444 1858.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:190716-1.
This name was in version 1 of The Plant List, record gcc-32095.