Taxon  Report   8835 
Polygonum hickmanii  H. R. Hinds & Rand. Morgan
Hickman's knotweed
Polygonum hickmanii
© 2006 California Department of Fish and Game
More photos from
CalPhotos / Calflora
Polygonum hickmanii, a dicot, is an annual herb that is native to California.
CNPS Rare Plant Rank: 1B.1 (rare, threatened, or endangered in CA and elsewhere).   8th Edition

It is listed by the State of California as Endangered and by the Federal Government as 'Endangered '.

Interactive Distribution Map

Observation Hotline
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point, line, or polygon

one or more occurrences
within a 7.5-minute quadrangle

Plant Characteristics
and Associations

Bloom Period
Polygonum hickmanii
© 2006 California Department of Fish and Game
Genus: Polygonum
Distribution by County 

Add an Observation of  Polygonum hickmanii

Name Status:
Accepted by JEF + CNPS + PLANTS
More information about  Polygonum hickmanii
Nursery / seed vendor availability from CNPLX
Commercial availability unknown.
Landscaping information from Calscape
Photos on CalPhotos / Google Images
Jepson eFlora

Records from the Consortium of California Herbaria


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]. 2018. Berkeley, California: The Calflora Database [a non-profit organization].
Available:   (Accessed: Jun 17, 2018).

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