PRIORITY 1A weeds are not present in Montana or have a limited presence. Management criteria will require prevention, education, and eradication if detected.
| Dyer's Woad |
Isatis tinctoria |
| Yellow Starthistle |
Centaurea solstitialis |
| Medusahead |
Taeniatherum caput-medusa |
| Common Reed\Phragmites |
Phragities australis |
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