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

• crossing
• crossing guard
• crossing over
• crossjack
• crosslet
• crossly
• crossness
• crossopterygian
• Crossopterygii
• crossover
• crossover voter
• crosspatch
• crosspiece
• crossroad
• crossroads
• crossruff
• crosstalk
• crosstie
• crosstown
• crosswalk
• crossway
• crossways
• crosswind
• crosswise
• crossword