Taxon  Report   6747 
Polygonum davisiae  A. Gray  (not an active name; please see Aconogonon davisiae)
Davis knotweed,  Davis' knotweed
Click on a photo to see it bigger.
Polygonum davisiae, a dicot, is a perennial herb that is native to California and is also found outside of California, but is confined to western North America.

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Plant Characteristics
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Bloom Period
Polygonum davisiae
© 2005 Steve Matson
Genus: Polygonum
Red Fir Forest, Lodgepole Forest, Subalpine Forest
Distribution by County 

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Name Status:
Accepted by PLANTS + JM93
TJM2 accepted name: Aconogonon davisiae
Alternate Names:
(according to)

PLANTS: Aconogonon davisiae
PLANTS: Aconogonum davisiae var. glabrum
PLANTS: Aconogonum davisiae
PLANTS: Aconogonum newberryi
PLANTS: Polygonum newberryi var. glabrum
PLANTS: Polygonum newberryi
NOTE: Polygonum davisiae is not an active name in the Calflora species table.
More information about  Polygonum davisiae
Nursery / seed vendor availability from CNPLX
Commercial availability unknown.
Landscaping information from Calscape
Photos on CalPhotos / Google Images

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]. 2018. Berkeley, California: The Calflora Database [a non-profit organization].
Available:   (Accessed: Mar 20, 2018).

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