Calflora
Distribution by County   10251    
Polygonum aviculare  L.
Prostrate knotweed
Polygonum aviculare, a dicot, is an annual or perennial herb that is not native to California.
Record Count by County

Alameda: 33 Lake: 11 Plumas: 32 Siskiyou: 15
Alpine: 7 Lassen: 17 Riverside: 55 Solano: 10
Amador: 9 Los Angeles: 150 Sacramento: 16 Sonoma: 20
Butte: 47 Madera: 3 San Benito: 2 Stanislaus: 5
Calaveras: 8 Marin: 34 San Bernardino: 73 Sutter: 15
Colusa: 7 Mariposa: 38 San Diego: 158 Tehama: 13
Contra Costa: 44 Mendocino: 14 San Francisco: 11 Trinity: 10
Del Norte: 1 Merced: 9 San Joaquin: 7 Tulare: 8
El Dorado: 19 Modoc: 26 San Luis Obispo: 78 Tuolumne: 5
Fresno: 26 Mono: 18 San Mateo: 50 Ventura: 49
Humboldt: 23 Monterey: 21 Santa Barbara: 137 Yolo: 20
Imperial: 1 Napa: 9 Santa Clara: 30 Yuba: 6
Inyo: 8 Nevada: 18 Santa Cruz: 25
Kern: 22 Orange: 57 Shasta: 6
Kings: 1 Placer: 6 Sierra: 6

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]. 2022. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 06/30/2022).