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

Alameda: 36 Kings: 1 Orange: 69 Santa Cruz: 25
Alpine: 6 Lake: 11 Placer: 5 Shasta: 4
Amador: 8 Lassen: 26 Plumas: 36 Sierra: 7
Butte: 47 Los Angeles: 151 Riverside: 62 Solano: 9
Calaveras: 9 Madera: 5 Sacramento: 13 Sonoma: 22
Colusa: 7 Marin: 38 San Benito: 2 Stanislaus: 4
Contra Costa: 43 Mariposa: 216 San Bernardino: 71 Sutter: 15
El Dorado: 17 Mendocino: 14 San Diego: 161 Tehama: 16
Fresno: 27 Merced: 9 San Francisco: 11 Trinity: 10
Glenn: 1 Modoc: 20 San Joaquin: 5 Tulare: 10
Humboldt: 21 Mono: 22 San Luis Obispo: 78 Tuolumne: 85
Imperial: 1 Monterey: 65 San Mateo: 58 Ventura: 57
Inyo: 13 Napa: 9 Santa Barbara: 141 Yolo: 16
Kern: 23 Nevada: 21 Santa Clara: 33 Yuba: 7

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).