Children (5 direct children, 5 direct and indirect children):
Centaurea aspera subsp. aspera
Centaurea aspera aspera
Centaurea aspera subsp. stenophylla
Centaurea aspera stenophylla
Centaurea aspera pseudosphaerocephala
Centaurea aspera scorpiurifolia
Centaurea aspera subsp. gentilii