Definitions of knapweed

n any of various plants of the genus Centaurea having purple thistlelike flowers

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slender knapweed
a variety of knapweed
Jersey knapweed
a variety of knapweed
Centaurea nigra, black knapweed, hardheads, lesser knapweed
a weedy perennial with tough wiry stems and purple flowers; native to Europe but widely naturalized
Centaurea scabiosa, great knapweed, greater knapweed
tall European perennial having purple flower heads
Type of:
any plant of the genus Centaurea

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