Webster’s Revised Unabridged Dictionary · 1913
Knapweed
Knap′weed′, n. (Bot.) The black centaury (Centaurea nigra); — so called from the knoblike heads of flowers. Called also bullweed.
Webster’s Revised Unabridged Dictionary · 1913
Knap′weed′, n. (Bot.) The black centaury (Centaurea nigra); — so called from the knoblike heads of flowers. Called also bullweed.