ARM 4.5.205. CATEGORY 4 - WATCH LIST

(1) Category 4 plant species are plants that are invasive and may cause significant economic or environmental impacts if allowed to become established in Montana. Research and monitoring for Category 4 plant species may result in future listing as a Category 1, 2, or 3 noxious weed in Montana. Plant species designated as a Category 4 plant are prohibited from sale in or into Montana. (2) The following are designated as Category 4 noxious weeds: (a) Scotch broom ( Cytisus scoparius ).