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Distribution by County   8379    
Zannichellia palustris  L.
Horned pondweed
Zannichellia palustris is a perennial herb that is native to California, and also found elsewhere in North America and beyond.
Record Count by County

Alameda: 15 Lassen: 4 Riverside: 31 Shasta: 2
Butte: 4 Los Angeles: 29 San Benito: 4 Siskiyou: 1
Colusa: 3 Marin: 8 San Bernardino: 34 Solano: 1
Contra Costa: 12 Mendocino: 2 San Diego: 37 Sonoma: 6
Glenn: 2 Merced: 7 San Francisco: 3 Tehama: 2
Humboldt: 1 Mono: 10 San Joaquin: 3 Tuolumne: 2
Imperial: 4 Monterey: 7 San Luis Obispo: 37 Ventura: 21
Inyo: 8 Napa: 2 Santa Barbara: 13
Kern: 19 Orange: 17 Santa Clara: 2
Lake: 1 Plumas: 2 Santa Cruz: 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).