Calflora, a 501c3 non-profit
Distribution by County   170    
Alisma plantago-aquatica  L.

(not an active name)
Water plantain
Alisma plantago-aquatica is a perennial herb (aquatic) that is native to California, and also found elsewhere in North America and beyond.
Record Count by County

Alameda: 5 Los Angeles: 6 Placer: 1 Santa Cruz: 3
Amador: 1 Marin: 8 Plumas: 1 Shasta: 5
Butte: 8 Mariposa: 2 Riverside: 1 Siskiyou: 4
Calaveras: 2 Mendocino: 3 Sacramento: 9 Solano: 7
Colusa: 1 Merced: 2 San Bernardino: 5 Sonoma: 10
Contra Costa: 5 Modoc: 3 San Joaquin: 2 Stanislaus: 1
Fresno: 4 Monterey: 2 San Luis Obispo: 3 Tuolumne: 5
Lake: 4 Napa: 2 San Mateo: 1 Ventura: 1
Lassen: 2 Nevada: 3 Santa Clara: 5 Yolo: 1

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: 11/16/2025).