Calflora, a 501c3 non-profit
Distribution by County   10667    
Polygonum aviculare  L.  ssp. aviculare 
Prostrate knotweed
Polygonum aviculare ssp. aviculare is an annual or perennial herb that is not native to California.
Record Count by County

Alameda: 7 Marin: 2 Riverside: 11 Sierra: 1
Butte: 7 Mariposa: 3 Sacramento: 2 Solano: 4
Colusa: 1 Mendocino: 1 San Bernardino: 11 Sonoma: 2
Contra Costa: 5 Merced: 1 San Diego: 7 Stanislaus: 1
Fresno: 1 Mono: 3 San Luis Obispo: 4 Sutter: 1
Humboldt: 3 Monterey: 2 San Mateo: 3 Ventura: 4
Inyo: 5 Napa: 2 Santa Barbara: 17 Yolo: 1
Kern: 4 Nevada: 1 Santa Clara: 2
Lake: 5 Orange: 18 Santa Cruz: 4
Los Angeles: 20 Plumas: 9 Shasta: 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]. 2024. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 11/21/2024).