Calflora, a 501c3 non-profit
Distribution by County   11009    
Persicaria hydropiper  (L.) Delarbre
Common smartweed
Persicaria hydropiper is an annual herb that is not native to California.
Record Count by County

Alameda: 3 Humboldt: 1 Nevada: 6 Sonoma: 8
Amador: 2 Inyo: 4 Placer: 2 Stanislaus: 1
Butte: 31 Kern: 2 Plumas: 2 Sutter: 1
Calaveras: 1 Los Angeles: 1 Riverside: 1 Tehama: 4
Colusa: 1 Madera: 4 Sacramento: 6 Trinity: 2
Contra Costa: 1 Mariposa: 5 San Joaquin: 5 Tuolumne: 2
El Dorado: 5 Mendocino: 3 Santa Clara: 4 Yolo: 1
Fresno: 2 Merced: 1 Shasta: 2 Yuba: 2
Glenn: 1 Napa: 3 Solano: 2

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).