Calflora, a 501c3 non-profit
Distribution by County   9901    
Equisetum hyemale  L.  var. affine  (Engelm.) A. A. Eaton

(not an active name)
Scouringrush horsetail
Equisetum hyemale var. affine is a fern that is native to California, and also found elsewhere in North America and beyond.
Record Count by County

Alameda: 18 Lake: 5 Plumas: 13 Siskiyou: 1
Alpine: 4 Lassen: 2 Riverside: 15 Solano: 12
Amador: 2 Los Angeles: 67 Sacramento: 33 Sonoma: 31
Butte: 35 Madera: 1 San Bernardino: 47 Sutter: 1
Colusa: 2 Marin: 24 San Diego: 18 Tehama: 11
Contra Costa: 5 Mariposa: 13 San Francisco: 13 Trinity: 14
Del Norte: 2 Mendocino: 26 San Joaquin: 1 Tulare: 16
El Dorado: 16 Modoc: 3 San Luis Obispo: 11 Tuolumne: 1
Fresno: 24 Mono: 4 San Mateo: 18 Ventura: 21
Glenn: 2 Monterey: 16 Santa Barbara: 34 Yolo: 1
Humboldt: 13 Napa: 3 Santa Clara: 6 Yuba: 1
Imperial: 2 Nevada: 3 Santa Cruz: 20
Inyo: 10 Orange: 14 Shasta: 12
Kern: 2 Placer: 8 Sierra: 2

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).