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Weed alert: Knapweeds …have you seen these plants? Black knapweed. Photo: Jim Dellow Knapweeds (Centaurea species) are members of the thistle family, but unlike other thistles, knapweeds have no spines on
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Document Date: 2013-06-03 21:29:35
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Weed alert: Knapweeds …have you seen these plants? Black knapweed. Photo: Jim Dellow Knapweeds (Centaurea species) are members of the thistle family, but unlike other thistles, knapweeds have no spines on