noun
- A weedy perennial with tough wiry stems and purple flowers; native to Europe but widely naturalized.
- synonyms: lesser knapweed, hardheads, Centaurea nigra
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). black knapweed. Retrieved September 20, 2026, from http://smartdefine.org/black_knapweed/definitions/1260596 |
| Chicago | WordNet. 2010. "black knapweed" http://smartdefine.org/black_knapweed/definitions/1260596 (accessed September 20, 2026). |
| Harvard | WordNet 2010, black knapweed, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/black_knapweed/definitions/1260596>. |
| MLA | WordNet. "black knapweed" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/black_knapweed/definitions/1260596> |