1. A weedy perennial with tough wiry stems and purple flowers; native to Europe but widely naturalized
   - lesser knapweed, black knapweed, hardheads

Type of: knapweed

• diuresis
• diuretic
• diuretic drug
• Diuril
• diurnal
• diurnal parallax
• diurnal variation
• diurnally
• div
• diva
• divagate
• divagation
• divalent
• divan
• divan bed
• divaricate
• divarication
• dive
• dive bomber
• dive brake
• dive-bomb
• dive-bombing
• diver
• diverge
• divergence