Calflora
Taxon  Report   6772    
Polygonum ramosissimum  Michx.
Bushy knotweed,  Yellow knotweed
Polygonum ramosissimum
© 2015 Daniel Boone
Photos from
CalPhotos / Calflora
Polygonum ramosissimum
© 2015 Daniel Boone
Polygonum ramosissimum
© 2015 Daniel Boone
Polygonum ramosissimum, a dicot, is an annual herb that is not native to California; it was introduced from elsewhere and naturalized in the wild.

Interactive Distribution Map


Observation Hotline
(observation details + photos)



point, line, or polygon

Plant Characteristics
and Associations



Bloom Period
Polygonum ramosissimum
© 2015 Daniel Boone
Family: POLYGONACEAE  
Genus: Polygonum
Subspecies and Varieties:
Communities: weed, characteristic of disturbed places

Wetlands: Equally likely to occur in wetlands and non wetlands

Habitat: disturbed

Name Status:
Accepted by JEF + PLANTS

Alternate Names:
ICPN: Polygonum patulum
More information about  Polygonum ramosissimum
Nursery / seed vendor availability from CNPLX
Commercial availability unknown.
Photos on Google Images
Jepson eFlora

Records from the Consortium of California Herbaria

ITIS Original Publication citation

USDA PLANTS Profile (PORA3)

Search the International Plants Names Index

Search efloras.org (Flora of North America)

website references from Google


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]. 2018. Berkeley, California: The Calflora Database [a non-profit organization].
Available: https://www.calflora.org/   (Accessed: Nov 15, 2018).

The information on this page comes from diverse sources. None of the links are sponsored.