| 单词 | black knapweed |
| 释义 | black knapweed (once / 2954828 pages) n WORD FAMILY black knapweed: black knapweeds n a weedy perennial with tough wiry stems and purple flowers; native to Europe but widely naturalized Syn|Hyper Centaurea nigra, hardheads, lesser knapweed knapweed any of various plants of the genus Centaurea having purple thistlelike flowers |
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