Calflora
Taxon  Report   10892    
Fallopia sachalinensis  (F. Schmidt Petrop.) Ronse Decr.
Giant knotweed
Fallopia sachalinensis, a dicot, is a perennial herb that is not native to California.
Cal-IPC rating: Moderate
Siskiyou Del Norte Modoc Humboldt Shasta Lassen Trinity Plumas Tehama Butte Mendocino Glenn Sierra Yuba Lake Nevada Colusa Placer Sutter El Dorado Yolo Alpine Napa Sonoma Sacramento Mono Amador Solano Calaveras Tuolumne San Joaquin Marin Contra Costa Alameda Santa Cruz Mariposa Madera San Francisco San Mateo Merced Fresno Stanislaus Santa Clara Inyo San Benito Tulare Kings Monterey San Bernardino San Luis Obispo Kern Santa Barbara Ventura Los Angeles Riverside Orange San Diego Imperial
Observation Search
(117 records)
one or more occurrences
within a 7.5-minute quadrangle

Bloom Period
Family: Polygonaceae  
Genus: Fallopia

Wetlands: Occurs usually in non wetlands, occasionally in wetlands

Communities: escaped cultivar

Name Status:
Accepted by JEF
Alternate Names:
JEFPolygonum sachalinense
JEFReynoutria sachalinensis
JEFTiniaria sachalinensis
More information about  Fallopia sachalinensis

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]. 2021. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 10/22/2021).