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Noxious Weeds List
Ravalli County Priority Weeds
The following weeds are priority weeds found in Ravalli County. Please contact the Weed Division if you encounter any of these species:
- Blueweed
- Common Bugloss
- Orange Hawkweed
- Salt Cedar
- Japanese Knotweed
- Purple Loostrife
- Rush Skeleton Weed
- Yellow Flag Iris
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Dyers woad
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Blueweed
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Canada thistle
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Common bugloss
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Dalmation toadflax
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Houndstongue
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Oxeye daisy
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Sulfur cinquefoil
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Whitetop
Montana Noxious Weed List
Priority 1A
Yellow starthistle (Centaurea solstitialis) |
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Dyer's woad (Isatis tinctoria) |
Priority 1B
Knotweed complex (Polygonum cuspidatum, P. sachalinense, P. x bohemicum, Fallopia japonica, F. sachalinensis, F. x bohemica, Reynoutria japonica, R. sachalinensis, and R. x bohemica) |
Purple loosestrife (Lythrum salicaria) |
Rush skeletonweed (Chondrilla juncea) |
Scotch broom (Cytisus scoparius) |
Priority 2A
Tansy ragwort (Senecio jacobaea, Jacobaea vulgaris) |
Meadow hawkweed complex (Hieracium caespitosum, H. praealturm, H. floridundum, and Pilosella caespitosa) |
Orange hawkweed (Hieracium aurantiacum, Pilosella aurantiaca) |
Tall buttercup (Ranunculus acris) |
Perennial pepperweed (Lepidium latifolium) |
Yellowflag iris (Iris pseudacorus) |
Blueweed (Echium vulgare) |
Hoary alyssum (Berteroa incana) |
Priority 2B
Canada thistle (Cirsium arvense) |
Field bindweed (Convolvulus arvensis) |
Leafy spurge (Euphorbia esula) |
Whitetop (Cardaria draba, Lepidium draba) |
Russian knapweed (Acroptilon repens, Rhaponticum repens) |
Spotted knapweed (Centaurea stoebe, C.maculosa) |
Diffuse knapweed (Centaurea diffusa) |
Dalmatian toadflax (Linaria dalmatica) |
St. Johnswort (Hypericum perforatum) |
Sulfur cinquefoil (Potentilla recta) |
Common tansy (Tanacetum vulgare) |
Oxeye daisy (Leucanthemum vulgare) |
Houndstongue (Cynoglossum officinale) |
Yellow toadflax (Linaria vulgaris) |
Saltcedar (Tamarix spp.) |
Flowering rush (Butomus umbellatus) |
Eurasian watermilfoil (Myriophyllum spicatum) |
Curlyleaf pondweed (Potamogeton crispus) |