Meaning of knapweed

knap•weed

Pronunciation: (nap'wēd"), [key]
— n.
  1. any composite plant of the genus Centaurea, esp. the weedy C. nigra, having rose-purple flowers set on a dark-colored, knoblike bract. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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