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Invasive Species Photo Gallery - Wisconsin DNRWisconsin DNR (.gov)
dnr.wi.gov
Black knapweed (Centaurea nigra). Click on a photo for an enlarged version or return to all non-native or native invasive plant species. Photo by Cindy Roche.
Don't lose ground to invasive spotted knapweedMissouri Department of Conservation (.gov)
mdc.mo.gov
— Cindy Roche, Bugwood.org Image. Photo of spotted knapweed plant showing foliage and growth habit. Credit.
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