Calflora, a 501c3 non-profit
Distribution by County   4459    
Juncus effusus  L.
Bog rush,   Common bog rush,   Common rush
Juncus effusus is a perennial grasslike herb that is native to California, and also found elsewhere in western North America.
Record Count by County

Alameda: 13 Lassen: 2 Plumas: 16 Sierra: 2
Amador: 6 Los Angeles: 14 Riverside: 51 Siskiyou: 2
Butte: 82 Madera: 21 Sacramento: 59 Solano: 44
Calaveras: 5 Marin: 233 San Benito: 7 Sonoma: 73
Colusa: 1 Mariposa: 9 San Bernardino: 77 Stanislaus: 13
Contra Costa: 25 Mendocino: 54 San Diego: 116 Tehama: 24
El Dorado: 43 Merced: 26 San Francisco: 29 Trinity: 30
Fresno: 54 Modoc: 2 San Joaquin: 25 Tulare: 19
Glenn: 5 Mono: 1 San Luis Obispo: 24 Tuolumne: 19
Humboldt: 45 Monterey: 32 San Mateo: 67 Ventura: 6
Inyo: 2 Napa: 8 Santa Barbara: 17 Yolo: 3
Kern: 5 Nevada: 17 Santa Clara: 28 Yuba: 24
Kings: 1 Orange: 6 Santa Cruz: 27
Lake: 10 Placer: 6 Shasta: 46

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: 12/04/2024).