Ernie Janes / RF- Ox-eye Daisies (Leucantemum vulgare) and Common Knapweed (Centaurea nigra) in hay meadow, Wensum Valley, Norfolk, UK. July. (This image may be licensed either as rights managed or royalty free.)
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Stephen Dalton / Peacock butterfly (Inachis io) with wings closed on Lesser knapweed flower, UK
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Stephen Dalton / Peacock butterfly (Inachis io) with wings open on Lesser knapweed flower, UK
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Stephen Dalton / Knapweed (Centaurea nigra) UK
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David Kjaer / Lesser / Black Knapweed {Centaurea nigra} in flower, Wiltshire, UK.
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Ross Hoddinott / Lesser / Black knapweed {Centaurea nigra} UK
