PRIORITY 1B

Priority 1B weeds have limited presence in Montana. Management criteria will require eradication or containment, where present, and prevention and education elsewhere.
 
Noxious Weed Species Common Name Scientific Name
Blueweed Echium vulgare
Japanese Knotweed Complex  Polygonum cuspidatum
 Rush Skeletonweed  Chondrilla juncea 
 Scotch Broom Cytisus scoparius
 Purple Loosestrife lythrum salicaria