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Collection place
- California26
- North America26
- The Americas26
- United States26
- San Francisco Bay Area, California19
- CA-CCo-138, Oakley, Contra Costa County16
- Contra Costa County, California16
- Oakley, Contra Costa County, California16
- Northern California7
- CA-Hum-169 (Tsurai), Humboldt County, California5
- Humboldt County coast, Humboldt County, California5
- Humboldt County, California5
- Northwestern California5
- Trinidad Bay, Humboldt County, California5
- Trinidad, Humboldt County, California5
- Berryessa Valley, Napa County, California3
- Napa County, California3
- CA-Nap-93, Berryessa Valley, Napa County2
- CA-Sis-262 (Foster site), Bogus Creek, Siskiyou County2
- Northeastern California2