| 11. | This weevil has been shown to reduce diffuse knapweed density at several sites.
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| 12. | Still from a Rana installation monitoring a knapweed flower.
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| 13. | Herbs include meadow buttercup, lesser knapweed and devil's bit scabious.
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| 14. | Flowers include ragged robin, oxeye daisy and knapweed.
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| 15. | A week of drizzles in early July caused knapweed and water basswood to flower.
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| 16. | Diffuse knapweed is known to establish more easily and effectively in recently disturbed environments.
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| 17. | In the Asteraceae, the knapweed " Centaurea diffusa " forms tumbleweeds.
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| 18. | Common plant include yarrow, birdsfoot trefoil, knapweed and ox-eye daisy.
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| 19. | He called the knapweed study exciting because it would encourage others to try similar efforts.
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| 20. | Areas in which diffuse knapweed has been established generally are plains rangelands or forest benchlands.
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