Found 2 items, similar to Centaurea nigra.
English → English (WordNet) Definition: Centaurea nigra Centaurea nigra n : a weedy perennial with tough wiry stems and purple flowers; native to Europe but widely naturalized [syn: lesser knapweed , black knapweed, hardheads]
English → English (gcide) Definition: Centaurea nigra 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] Knapweed \Knap"weed`\, n. (Bot.) The black centaury (Centaurea nigra); -- so called from the knoblike heads of flowers. Called also bullweed. [1913 Webster] Matfelon \Mat"fel*on\, n. [W. madfelen.] (Bot.) The knapweed (Centaurea nigra). [1913 Webster]