State Distribution (11 / 50 states)
Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming
Listings by State
| State |
Classification |
Common Name Listed |
Notes |
| California | A | Spiny thistle | |
| Colorado | Class C | Spiny thistle | |
| Georgia | Restricted | Spiny thistle | |
| Nevada | Class B | Spiny Plumeless Thistle | Scattered populations |
| New Mexico | Class B | Plumeless Thistle | Biennial forb |
| New York | Prohibited | Plumeless Thistle | Biennial forb |
| North Carolina | Class B | Plumeless Thistle | Biennial forb |
| Ohio | Prohibited | Plumeless Thistle | Biennial forb |
| Oklahoma | Noxious | Plumeless Thistle | Biennial forb |
| Rhode Island | Invasive | Plumeless Thistle | Biennial forb |
| South Carolina | Invasive | Plumeless Thistle | Biennial forb |
Data compiled from individual state Department of Agriculture noxious weed lists.
Verify against current official state sources before regulatory use.
| U.S. Noxious Weed Database — generated April 2026.