Noxious Weeds Known to Occur in the Challis Field Office | | Hoary Cress (whitetop) | Cardaria draba | | Musk (or nodding) thistle | Carduus nutans | | Diffuse Knapweed | Centaurea diffusa | | Spotted Knapweed | Centaurea maculosa | | Russian Knapweed | Centaurea repens | | Rush Skeletonweed | Chondrilla juncea | | Canada Thistle | Cirsium arvense | | Poison Hemlock | Conium maculatum | | Field Bindweed | Convolvulus arvensis | | Leafy Spurge | Euphorbia esula | | Black Henbane | Hyoscyamus niger | | Yellow Toadflax | Linaria vulgaris | | Scotch Thistle | Onopordon acanthium | | Perennial sowthistle | Sonchus arvensis |
|
|
