Region
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Pacific Coast
1
Pacific Coast (North America)
1
Pacific Coast (U.S.)
2
Pacific States
1
Panama
1
Pennsylvania
5
Piedmont (U.S. : Region
1
Piedmont (U.S. : Region)
1
Pine County
1
Puerto Rico
1
Rome
2
Russia (Federation)
1
San Francisco Bay Area
1
Savannah River Site
1
Scotland
3
Sequoia National Park
1
Sequoia National Park (Calif.)
1
Shenandoah National Park
1
Sierra Nevada (Calif. and Nev.)
1
South Africa
1
South Carolina
1
Southeast Asia
1
Southern States
10
Southwest, New
3
Sudan
1
Switzerland
1
Tennessee
3
Texas
2
Texas Hill Country
1
Tongass National Forest
1
Tropics
6
United States
92
United States Virgin Islands
1
United States, East
1
United States, West
1
Upperville
1
Vermont
3
Virginia
3
Volga River Watershed
1
Washington (State)
6
West (U.S.)
9
West Virginia
1
White Mountain National Forest (N.H. and Me.)
1
White Mountains (Calif. and Nev.)
1
Willamette National Forest
1
Wisconsin
2
Yap
1
Yonkers
1
Zimbabwe
1
États-Unis
1