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)

point, line, or polygon

Plant Characteristics
and Associations

Bloom Period
Polygonum ramosissimum
© 2015 Daniel Boone
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


Search the International Plants Names Index

Search (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]. 2019. Berkeley, California: The Calflora Database [a non-profit organization]. Available:   (Accessed: Jan 17, 2019).