Calflora, a 501c3 non-profit
Distribution by County   11034    
Polygonum aviculare  L.  ssp. depressum  (Meisn.) Arcang.
Prostrate knotweed
Polygonum aviculare ssp. depressum is an annual or perennial herb that is not native to California.
Record Count by County

Alameda: 30 Lassen: 2 Riverside: 42 Solano: 13
Alpine: 6 Los Angeles: 71 Sacramento: 22 Sonoma: 31
Amador: 1 Marin: 39 San Benito: 10 Stanislaus: 7
Butte: 20 Mariposa: 21 San Bernardino: 28 Sutter: 5
Colusa: 1 Mendocino: 22 San Diego: 115 Tehama: 7
Contra Costa: 28 Merced: 12 San Francisco: 33 Trinity: 1
El Dorado: 11 Modoc: 19 San Joaquin: 5 Tulare: 23
Fresno: 20 Mono: 26 San Luis Obispo: 21 Tuolumne: 3
Glenn: 1 Monterey: 66 San Mateo: 45 Ventura: 35
Humboldt: 7 Napa: 7 Santa Barbara: 62 Yolo: 11
Imperial: 1 Nevada: 14 Santa Clara: 17 Yuba: 3
Inyo: 11 Orange: 13 Santa Cruz: 14
Kern: 15 Placer: 4 Shasta: 8
Lake: 5 Plumas: 17 Sierra: 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).