J.F. Gmel.
Fourleaf Yam
| Province | Rank | Native |
|---|---|---|
| Florida | SNR | Yes |
| Georgia | SNR | Yes |
| Louisiana | SNR | Yes |
| Oklahoma | SNR | Yes |
| Kansas | SNR | Yes |
| Tennessee | SNR | Yes |
| West Virginia | S5 | Yes |
| Alabama | SNR | Yes |
| District of Columbia | SNR | Yes |
| Maryland | SNR | Yes |
| Texas | SNR | Yes |
| Mississippi | SNR | Yes |
| Arkansas | SNR | Yes |
| Virginia | S5 | Yes |
| Indiana | SNR | Yes |
| South Carolina | SNR | Yes |
| Illinois | S3 | Yes |
| Rhode Island | SNR | Yes |
| Nebraska | SNR | Yes |
| Ohio | SNR | Yes |
| Iowa | SNR | Yes |
| Wisconsin | SNR | Yes |
| New Jersey | SNR | Yes |
| North Carolina | S4 | Yes |
| Pennsylvania | SNR | Yes |
| Missouri | SNR | Yes |
| Kentucky | SNR | Yes |
| Minnesota | SNR | Yes |
| Area | Forest | Acres |
|---|---|---|
| Cheat Mountain | Monongahela National Forest | 8,191 |