Taxon  Report   6743 
Polygonum californicum  Meissner
California knotweed
Polygonum californicum
© 2004 Steve Matson
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Polygonum californicum
© 2015 John Doyen
Polygonum californicum
© 2015 John Doyen
Polygonum californicum, a dicot, is an annual herb that is native to California and is also found outside of California, but is confined to western North America.

Interactive Distribution Map

Observation Hotline
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Plant Characteristics
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Bloom Period
Polygonum californicum
© 2015 John Doyen
Genus: Polygonum
Foothill Woodland, Northern Oak Woodland, Yellow Pine Forest
Distribution by County 

Add an Observation of  Polygonum californicum

Name Status:
Accepted by TJM2 + PLANTS + JM93
Alternate Names:
(according to)

PLANTS: Polygonum greenii
More information about  Polygonum californicum
Jepson eFlora

Records from the Consortium of California Herbaria

Original Publication citation (ITIS)


Search the International Plants Names Index

Search (Flora of North America)

Search the Lady Bird Johnson Wildflower Center

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]. 2016. Berkeley, California: The Calflora Database [a non-profit organization].
Available:   (Accessed: Oct 21, 2016).

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