Bernh.
Desert Thorn-apple
| Province | Rank | Native |
|---|---|---|
| California | SNR | Yes |
| Arizona | SNR | Yes |
| Area | Forest | Acres |
|---|---|---|
| Catalina St. Pk. Roadless Area | Coronado National Forest | 951 |
| Middle Romero WSR | Coronado National Forest | 60 |
| Oracle Roadless | Coronado National Forest | 22,365 |
| Upper Romero Wsr | Coronado National Forest | 150 |