Centaurea solstitialis

• An annual to short-lived weed that spreads by seed only
• Grows one to three feet tall
• Bright yellow flower heads are about 1 inch in diameter
• Inch-long spines form at ends of bracts under flowerheads
• Stems are winged, but not spiny
• Grows along roadsides and in waste areas and grasslands
• Pull, dig or mow at first sign of yellow flowers
• Chemical controls are available