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Taxon  Report  
Polygonum polygaloides  Meisn.  ssp. confertiflorum  (Nutt. ex Piper) J. C. Hickman
Dense knotweed,   Fruitleaf knotweed
Polygonum polygaloides ssp. confertiflorum is an annual herb that is native to California, and also found elsewhere in western North America.
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 polygaloides
Genus: Polygonum
Family: Polygonaceae  
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot

Communities: Northern Juniper Woodland, wetland-riparian
Name Status:
Accepted by JEF + PLANTS
Alternate Names:
JEF + PLANTSPolygonum confertiflorum
PLANTSPolygonum imbricatum
JEF + PLANTSPolygonum kelloggii var. confertiflorum
JEF + PLANTSPolygonum watsonii
Information about  Polygonum polygaloides ssp. confertiflorum from other sources
Nursery availability from CNPLX
Commercial availability unknown.
Jepson eFlora

USDA PLANTS Profile (POPOC)

Photos on Calflora

Photos on CalPhotos

Google Images

Photos on iNaturalist

ID Tips on PlantID.net


Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals. [web application]. 2025. The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 05/14/2025).