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Collection place
- North America416
- The Americas416
- United States[remove]416
- California408
- Northern California292
- Northwestern California174
- North Central California112
- San Francisco Bay Area, California105
- Humboldt County, California102
- Klamath River, Humboldt County, California75
- Sacramento County, California70
- Klamath River below Weitchpec, Humboldt County, California46
- Alameda County, California43
- Yolo County, California28
- Weitchpec, Humboldt County, California26
- near Weitchpec, Klamath River, Humboldt County26
- CA-Ala-309, Emeryville, Alameda County24
- CA-Yol-13 (Mustang Mound), Yolo County, California24
- Contra Costa County, California24
- Emeryville, Alameda County, California24