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Collection place
- California53
- North America53
- Northern California53
- Northwestern California53
- The Americas53
- United States53
- Humboldt County, California35
- Mad River, Humboldt County, California21
- Maple Creek, Mad River, Humboldt County21
- Blocksburg, Humboldt County, California11
- Bridgeville, Humboldt County, California3
- Crescent City, Del Norte County, California3
- Del Norte County, California3
- Elk Valley, Del Norte County, California3
- Van Duzen River, Humboldt County, California3
- Soldier Basin, Trinity County, California1
- Trinity County, California1