Calflora, a 501c3 non-profit
Distribution by County   5738    
Myriophyllum spicatum  L.
American milfoil,   Eurasian milfoil,   Spike watermilfoil,   Water milfoil
Myriophyllum spicatum is a perennial herb that is not native to California.
Cal-IPC rating: high
Record Count by County

Alameda: 11 Lake: 4 Orange: 4 Santa Barbara: 1
Amador: 1 Lassen: 3 Placer: 47 Santa Clara: 3
Butte: 31 Los Angeles: 3 Plumas: 2 Shasta: 9
Calaveras: 2 Madera: 3 Riverside: 5 Siskiyou: 2
Colusa: 1 Marin: 13 Sacramento: 23 Solano: 9
Contra Costa: 9 Mariposa: 5 San Bernardino: 16 Sonoma: 2
El Dorado: 333 Mendocino: 1 San Diego: 9 Sutter: 2
Fresno: 3 Merced: 5 San Francisco: 4 Tehama: 3
Glenn: 5 Modoc: 2 San Joaquin: 11 Tuolumne: 4
Humboldt: 2 Napa: 6 San Luis Obispo: 14 Yolo: 13
Imperial: 17 Nevada: 18 San Mateo: 8 Yuba: 11

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]. 2023. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 09/29/2023).