Centaurea banatica Hayek accepted as Centaurea borysthenica Gruner (original description)
Centaurea micranthos (Griseb.) S.G.Gmel. ex Hayek accepted as Centaurea stoebe subsp. australis (Pančić ex A.Kern.) Greuter (original description)
Centaurea reichenbachioides Hayek accepted as Centaurea reichenbachii DC. (original description)
Centaurea rotundifolia (Bartl.) Hayek accepted as Centaurea nigrescens subsp. vochinensis (Bernh. ex Rchb.) Nyman (original description)
Centaurea stenolepis f. cetia Hayek accepted as Centaurea phrygia subsp. stenolepis (A.Kern.) Gugler (original description)
Centaurea tenuifolia (Gaudin) Hayek accepted as Centaurea scabiosa subsp. grinensis (Reut.) Nyman (original description)