The Montana Noxious Weed List categorizes all noxious weeds across the state in order of priority. 



 
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