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Distribution by County   11776    
Juncus effusus  L.  ssp. pacificus  (Fernald & Wiegand) Piper & Beattie
Pacific rush
Juncus effusus ssp. pacificus is a perennial grasslike herb that is native to California.
Record Count by County

Alameda: 13 Inyo: 1 Riverside: 10 Shasta: 13
Alpine: 1 Kern: 2 Sacramento: 6 Sierra: 1
Amador: 2 Lake: 5 San Benito: 72 Siskiyou: 14
Butte: 66 Marin: 51 San Bernardino: 3 Solano: 2
Calaveras: 2 Mariposa: 5 San Diego: 10 Sonoma: 42
Colusa: 2 Mendocino: 34 San Francisco: 3 Stanislaus: 2
Contra Costa: 23 Monterey: 28 San Joaquin: 5 Tehama: 8
Del Norte: 16 Napa: 17 San Luis Obispo: 24 Trinity: 17
El Dorado: 16 Nevada: 12 San Mateo: 59 Tulare: 6
Fresno: 17 Orange: 1 Santa Barbara: 3 Tuolumne: 7
Glenn: 1 Placer: 8 Santa Clara: 14 Ventura: 4
Humboldt: 51 Plumas: 15 Santa Cruz: 17 Yuba: 10

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: 04/16/2026).