Taxon  Report   6737 
Polygonum arenastrum  Boreau  (not an active name; please see Polygonum aviculare ssp. depressum)
Common knotweed,  Dooryard knotweed, Oval leaf knotweed
Polygonum arenastrum
© 1995 Saint Mary's College of California
Click on a photo to see it bigger.
Polygonum arenastrum, a dicot, is an annual or perennial herb that is not native to California; it was introduced from elsewhere and naturalized in the wild.

Interactive Distribution Map

Observation Hotline
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Plant Characteristics
and Associations
Polygonum arenastrum
© 2011 Jorg & Mimi Fleige
Genus: Polygonum
weed, characteristic of disturbed places, wetland-riparian
Habitat: disturbed
Distribution by County 

Add an Observation of  Polygonum arenastrum

Name Status:
Accepted by PLANTS + JM93
TJM2 accepted name: Polygonum aviculare ssp. depressum
Alternate Names:
(according to)

PLANTS: Polygonum aequale
PLANTS: Polygonum aviculare var. arenastrum
PLANTS: Polygonum montereyense
XWALK: Polygonum aviculare var. aviculare
XWALK: Polygonum aviculare var. littorale
NOTE: Polygonum arenastrum is not an active name in the Calflora species table.
More information about  Polygonum arenastrum
Nursery / seed vendor availability from CNPLX
Commercial availability unknown.
Photos on CalPhotos / Google Images
UC Integrated Pest Management Weed Photo Gallery
(profile of this plant as an agricultural weed)

Records from the Consortium of California Herbaria

Original Publication citation (ITIS)


Search the International Plants Names Index

Search (Flora of North America)

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: Feb 22, 2018).

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