Calflora, a 501c3 non-profit
Distribution by County   2926    
Elodea canadensis  Michx.
Canadian waterweed,   Common water weed,   Elodea,   Waterweed
Elodea canadensis is a perennial herb that is native to California.
Record Count by County

Alameda: 4 Lassen: 2 Nevada: 8 Siskiyou: 9
Butte: 26 Los Angeles: 3 Placer: 5 Solano: 2
Contra Costa: 4 Madera: 5 Plumas: 7 Sonoma: 5
El Dorado: 120 Marin: 12 Sacramento: 5 Stanislaus: 1
Fresno: 6 Mariposa: 2 San Bernardino: 10 Sutter: 1
Glenn: 2 Merced: 6 San Joaquin: 4 Tehama: 7
Humboldt: 3 Modoc: 9 San Luis Obispo: 4 Tuolumne: 2
Inyo: 2 Mono: 14 Santa Barbara: 2 Ventura: 3
Kern: 5 Monterey: 2 Shasta: 7 Yolo: 3
Lake: 3 Napa: 3 Sierra: 5 Yuba: 3

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]. 2025. The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 12/10/2025).