Taxon  Report   6743 
Polygonum californicum  Meissner
California knotweed
Polygonum californicum
© 2004 Steve Matson
CalPhotos: click on a
photo to see it bigger
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
(observation details + photos)



point, line, or polygon

Plant Characteristics
and Associations



Bloom Period
Polygonum californicum
© 2015 John Doyen
Family: POLYGONACEAE  
Genus: Polygonum
Communities:
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
Nursery / seed vendor availability from CNPLX
Commercial availability unknown.
Photos on CalPhotos / Google Images
website references from Google

Jepson eFlora

Records from the Consortium of California Herbaria

USDA PLANTS Profile (POCA7)

Original Publication citation (ITIS)

Search the International Plants Names Index

Search efloras.org (Flora of North America)

Search the Lady Bird Johnson Wildflower Center


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: http://www.calflora.org/   (Accessed: May 03, 2016).

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