Pitkin County Noxious Weed List
Canada Thistle
Musk Thistle
Common Burdock
Oxeye Daisy
Common Tansy
Plumeless Thistle
Dalmatian Toadflax
Poison Hemlock
Dame's Rocket
Purple Loosestrife
Diffuse Knapweed
Russian Knapweed
Field Bindweed
Scentless Chamomile
Hoary Cress
Scotch Thistle
Houndstongue
Spotted Knapweed
Leafy Spurge
Yellow Toadflax
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