Calflora
Taxon  Report   6737    
Polygonum arenastrum  Boreau  (no longer an active name)
Common knotweed,  Dooryard knotweed, Oval leaf knotweed
Polygonum arenastrum
© 2011 Jorg & Mimi Fleige
Photos from
CalPhotos / Calflora
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
(observation details + photos)



point, line, or polygon

Plant Characteristics
and Associations
Polygonum arenastrum
© 1995 Saint Mary's College of California
Family: POLYGONACEAE  
Genus: Polygonum
Communities: weed, characteristic of disturbed places, wetland-riparian

Habitat: disturbed

Name Status:
Accepted by PLANTS

ICPN accepted name:
Polygonum aviculare ssp. depressum

Alternate Names:
PLANTS: Polygonum aequale
PLANTS: Polygonum aviculare var. arenastrum
PLANTS: Polygonum montereyense
. . .
NOTE: Polygonum arenastrum is no longer an active name.
More information about  Polygonum arenastrum
Nursery / seed vendor availability from CNPLX
Commercial availability unknown.
Photos on Google Images
UC Integrated Pest Management Weed Photo Gallery
(profile of this plant as an agricultural weed)

Records from the Consortium of California Herbaria

ITIS Original Publication citation

USDA PLANTS Profile (POAR11)

Search the International Plants Names Index

Search efloras.org (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: https://www.calflora.org/   (Accessed: Nov 19, 2018).

The information on this page comes from diverse sources. None of the links are sponsored.