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Place
- Southeastern Plains1
- Southeastern Wisconsin Till Plains1
- Southern Basin and Range1
- Southern California Mountains1
- Southern Coastal Plain1
- Southern Deserts1
- Southern Florida Coastal Plain1
- Southern Rockies1
- Southern Texas Plains1
- Southern and Central California Plains and Hills1
- Southwestern Appalachians1
- Southwestern Tablelands1
- Texas Blackland Prairies1
- Wasatch and Uinta Mountains1
- Western Allegheny Plateau1
- Western Corn Belt Plains1
- Western Gulf Coastal Plains1
- Western High Plains1
- Willamette Valley1
- Wyoming Basin1