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Collection place
- Faiyum region, Lower Egypt4
- Fall River Valley, Shasta County, California4
- Federated States of Micronesia27
- Fiji1
- Flagstaff area, Coconino County, Arizona1
- Flagstaff, Coconino County, Arizona1
- Florida1
- Folha, Rio Andirá, Brazil1
- Fort Apache, Apache County, Arizona3
- Fort Bidwell, Modoc County, California3
- Fort Bragg, Mendocino County, California19
- Fort Hamlun, Yukon Territory, Canada1
- Fort McDowell, Maricopa County, Arizona1
- Fort Portal, Uganda2
- Fort Selkirk, Yukon Territory, Canada1
- Fort Wingate, McKinley County, New Mexico1
- Four Corners Region, Southwestern United States2
- Fox Islands, Aleutians East Borough, Alaska5
- Fraser River, British Columbia, Canada12
- French Polynesia1