centaurea nigra



From The Collaborative International Dictionary of English v.0.48:


Ironheads \I"ron*heads`\, n. (Bot.)
   A European composite herb (Centaurea nigra); -- so called
   from the resemblance of its knobbed head to an iron ball
   fixed on a long handle. --Dr. Prior.
   [1913 Webster]
.



From The Collaborative International Dictionary of English v.0.48:


Knapweed \Knap"weed`\, n. (Bot.)
   The black centaury (Centaurea nigra); -- so called from the
   knoblike heads of flowers. Called also bullweed.
   [1913 Webster]
.



From The Collaborative International Dictionary of English v.0.48:


Matfelon \Mat"fel*on\, n. [W. madfelen.] (Bot.)
   The knapweed (Centaurea nigra).
   [1913 Webster]














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