(1) These weeds have limited presence in Montana. Management criteria will require eradication or containment and education:

(a) Knotweed complex (Polygonum cuspidatumˌ P. sachalinenseˌ P. × bohemicumˌ Fallopia japonicaˌ F. sachalinensisˌ F. × bohemicaˌ Reynoutria japonicaˌ R. sachalinensisˌ and R.× bohemica);

(b) Purple loosestrife (Lythrum salicaria);

(c) Rush skeletonweed (Chondrilla juncea); and

(d) Scotch broom (Cytisus scoparius).