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Collection place
- California[remove]221
- North America221
- The Americas221
- United States221
- Northern California210
- North Central California140
- Sacramento County, California132
- CA-Sac-16 (Bennet Mound), Sacramento County, California106
- Lassen County, California70
- Northeastern California70
- Honey Lake Valley, Lassen County, California12
- CA-Sac-21 (Hollister Mound), Sacramento County, California11
- CA-Las-3, Lassen County, California10
- Yolo County, California8
- Elk Slough, Yolo County, California6
- CA-Las-33, Long Valley, Lassen County5
- CA-Las-83, Lassen County, California5
- CA-Yol-53, Yolo County, California5
- Central California5
- Long Valley, Lassen County, California5