Taxon  Report   6740 
Polygonum bidwelliae  S. Watson
Bidwell's knotweed
Polygonum bidwelliae
© 2010 George W. Hartwell
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Polygonum bidwelliae, a dicot, is an annual herb that is native to California and is endemic (limited) to California.
It is included in the CNPS Inventory of Rare and Endangered Plants on list 4.3 (limited distribution).   7th Edition  /  8th Edition

Interactive Distribution Map


Observation Hotline
(observation details + photos)



point, line, or polygon

one or more occurrences within a 7.5-minute quadrangle

Plant Characteristics
and Associations



Bloom Period
Polygonum bidwelliae
© 2010 George W. Hartwell
Family: POLYGONACEAE  
Genus: Polygonum
Communities:
Chaparral, Valley Grassland, Foothill Woodland
Distribution by County 

Add an Observation of  Polygonum bidwelliae

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

PLANTS: Duravia bidwelliae
More information about  Polygonum bidwelliae
Nursery / seed vendor availability from CNPLX
Commercial availability unknown.
Photos on CalPhotos / Google Images

Jepson eFlora

Records from the Consortium of California Herbaria

USDA PLANTS Profile (POBI4)

Original Publication citation (ITIS)

Search the International Plants Names Index

Search efloras.org (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: http://www.calflora.org/   (Accessed: Feb 14, 2016).

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