Place
- New York, New York, United States15
- Jasper Ridge Biological Preserve (Calif.)5
- Woodside (Calif.)5
- Asia4
- Merced County (Calif.)4
- Canada3
- Tehama County (Calif.)2
- Alaska1
- Andes1
- Antarctica1
- Europe1
- Greenland1
- Iceland1
- Lower Latitudes1
- Middle East1
- New Zealand1
- Russia1
- Scandinavia1
- Sierra Nevada (Calif. and Nev.)1
- Stanford (Calif.)1