Calflora, a 501c3 non-profit
Distribution by County   1511    
Ample leaved sedge, Big leaf sedge
Carex amplifolia is a perennial grasslike herb that is native to California, and also found elsewhere in western North America.
Record Count by County

Alpine: 6 Humboldt: 8 Napa: 7 Siskiyou: 25
Butte: 34 Lake: 11 Nevada: 9 Sonoma: 5
Calaveras: 1 Lassen: 7 Placer: 7 Tehama: 15
Colusa: 2 Madera: 4 Plumas: 61 Trinity: 21
Del Norte: 7 Marin: 20 San Mateo: 32 Tulare: 14
El Dorado: 14 Mariposa: 15 Santa Cruz: 9 Yuba: 8
Fresno: 8 Mendocino: 11 Shasta: 19
Glenn: 7 Modoc: 3 Sierra: 4

Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals, including the Consortium of California Herbaria. [web application]. 2026. The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 10/05/2026).