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Distribution by County   3022    
Equisetum arvense  L.
Common horsetail rush,   Common horsetail, field horsetail,   Field horsetail
Equisetum arvense is a fern that is native to California, and also found elsewhere in North America and beyond.
Record Count by County

Alameda: 25 Lake: 4 Plumas: 57 Sierra: 34
Alpine: 7 Lassen: 13 Riverside: 16 Siskiyou: 14
Amador: 2 Los Angeles: 20 Sacramento: 7 Solano: 6
Butte: 41 Madera: 7 San Benito: 2 Sonoma: 41
Calaveras: 8 Marin: 113 San Bernardino: 58 Sutter: 4
Colusa: 3 Mariposa: 34 San Diego: 47 Tehama: 21
Contra Costa: 5 Mendocino: 66 San Francisco: 2 Trinity: 25
Del Norte: 15 Modoc: 10 San Joaquin: 3 Tulare: 59
El Dorado: 40 Mono: 52 San Luis Obispo: 11 Tuolumne: 20
Fresno: 96 Monterey: 17 San Mateo: 48 Ventura: 18
Glenn: 1 Napa: 2 Santa Barbara: 10 Yolo: 1
Humboldt: 47 Nevada: 47 Santa Clara: 23 Yuba: 4
Inyo: 19 Orange: 32 Santa Cruz: 29
Kern: 12 Placer: 44 Shasta: 32

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]. 2024. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 04/19/2024).