Region
North America
86
United States
9
California
7
Alaska
4
New York (State)
4
Idaho
3
Missouri
3
Nevada
3
Pennsylvania
3
Texas
3
Vermont
3
Kansas
2
Maine
2
Massachusetts
2
Minnesota
2
Montana
2
New Mexico
2
Oregon
2
Utah
2
Wyoming
2
Alabama
1
Atlantic Coast
1
Berkshire County
1
Colorado
1
Connecticut
1
Cuba
1
Elliott County
1
Hudson River Valley (N.Y. and N.J.)
1
Illinois
1
Indian Territory
1
Kentucky
1
Lincoln County
1
Mono Lake
1
New England
1
New Madrid
1
New York
1
North Dakota
1
Ohio
1
Oklahoma
1
Pacific Coast
1
Preston
1
Purgatory Canon
1
Rhode Island
1
South Dakota
1
Taconic Range
1
Virginia
1
Washington (State)
1
Wisconsin
1
Yukon
1