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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: 24 Lake: 4 Plumas: 59 Sierra: 34
Alpine: 8 Lassen: 14 Riverside: 18 Siskiyou: 5
Amador: 2 Los Angeles: 20 Sacramento: 6 Solano: 6
Butte: 43 Madera: 7 San Benito: 2 Sonoma: 41
Calaveras: 8 Marin: 118 San Bernardino: 58 Sutter: 4
Colusa: 3 Mariposa: 34 San Diego: 47 Tehama: 24
Contra Costa: 6 Mendocino: 68 San Francisco: 2 Trinity: 23
Del Norte: 2 Modoc: 5 San Joaquin: 3 Tulare: 61
El Dorado: 44 Mono: 53 San Luis Obispo: 10 Tuolumne: 20
Fresno: 98 Monterey: 18 San Mateo: 52 Ventura: 17
Glenn: 1 Napa: 2 Santa Barbara: 10 Yolo: 1
Humboldt: 39 Nevada: 50 Santa Clara: 24 Yuba: 4
Inyo: 21 Orange: 32 Santa Cruz: 29
Kern: 12 Placer: 44 Shasta: 30

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: 11/21/2024).