Collection place
- Churchill County, Nevada70 objects
- Washoe County, Nevada58 objects
- Humboldt County, Nevada47 objects
- NV-Pe-5, Pershing County, Nevada41 objects
- NV-Pe-30, Pershing County, Nevada37 objects
- Humboldt Lake region, Churchill County, Nevada34 objects
- Black Rock Desert Wilderness, Humboldt County, Nevada29 objects
- NV-Hu-17 (Buck Brush Springs), Humboldt County, Nevada29 objects
- Barro area, Napa Valley, Napa County25 objects
- CA-Mod-215, Modoc County, California25 objects
- CA-Nap-131, Napa Valley, Napa County25 objects
- Contra Costa County, California25 objects
- Upper Napa Valley, Napa County, California25 objects
- NV-Wa-187, Washoe County, Nevada24 objects
- CA-SBr-288, San Bernardino County, California23 objects
- Elko County, Nevada23 objects
- NV-El-11, Elko County, Nevada23 objects
- San Bernardino County, California23 objects
- Southern California23 objects
- CA-Pla-5 or 6, Placer County, California21 objects