Bitter fleabane (Centaurea gloriosa)

Same genus

• Cornflower (Centaurea cyanus)
• Brown knapweed (Centaurea jacea)
• Great knapweed (Centaurea centaurium)
• Rough star-thistle (Centaurea aspera)
• Pasture knapweed (Centaurea bovina)
• Meadow knapweed (Centaurea debeauxii)
• Iranian knapweed (Centaurea depressa)
• North African knapweed (Centaurea diluta)

The whole genus Knapweed (Centaurea)