This name is a synonym of Centaurea jacea subsp. angustifolia (DC.).
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym (record 9AF747F2-9939-4B09-A240-577201E9AE81) with original publication details: 350 1857.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:190409-1.
This name was in version 1 of The Plant List, record gcc-47207.