Calflora Taxon Report
Polygonum ramosissimum  Michx.  ssp. ramosissimum 
Yellow knotweed
Polygonum ramosissimum ssp. ramosissimum is an annual herb that is native to California.
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
DJJJASONAFMM

Bloom Period
Parent: Polygonum ramosissimum
Genus: Polygonum
Family: Polygonaceae  
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot

Wetlands: Equally likely to occur in wetlands and non wetlands
Name Status:
Accepted by JEF
Alternate Names:
JEFPolygonum exsertum
JEFPolygonum interior
JEFPolygonum latum
JEFPolygonum leptocarpum
OTHERPolygonum ramosissimum var. ramosissimum
More …
Information about Polygonum ramosissimum ssp. ramosissimum from other sources
Nursery availability from CNPLX
Commercial availability unknown.
Jepson eFlora

Photos on Calflora

Photos on CalPhotos

Google Images

Photos on iNaturalist

ID Tips on PlantID.net

Suggested Citation
“Calflora - Taxon Report.” The Calflora Database, a non-profit organization. .

Accessed: