Knapweed definition

năpwēd
Any of various weedy thistlelike plants in the composite family having flowers grouped in a head with a spiny involucre, especially several species of the genus Centaurea and the Eurasian species Acroptilon repens.
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Any of several weedy plants (genus Centaurea) of the composite family; esp., a hardy perennial (C. nigra) with heads of rose-purple flowers.
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Any of various common weeds of the genus Centaurea.
  • Especially Centaurea nigra.
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Alternative Forms

Alternative Form of knapweed - knopweed

Other Word Forms

Noun

Singular:
knapweed
Plural:
knapweeds

Origin of knapweed

  • Middle English knopwed knop knob knop wed weed weed1

    From American Heritage Dictionary of the English Language, 5th Edition

  • Alteration of knopweed.

    From Wiktionary

Knapweed Sentence Examples

  • The reserve also boasts probably the largest numbers of the parasitic knapweed broomrape anywhere in the county.

  • Both sites had new species including water chickweed, common toadflax, snapdragon, common hemp nettle, dwarf mallow and greater knapweed.

  • Look out for wild carrot, white clover, weld, ragwort, thistle and black knapweed.

  • The flowerheads of greater knapweed have long rays which are lacking in common knapweed.

  • Dave Burch, the state's weed coordinator, estimated spotted knapweed costs the state's economy $ 42 million a year.

More sentences

Also Mentioned In

Words near knapweed in the Dictionary