Taxon  Report   11015 
Persicaria wallichii  Greuter & Burdet
Himalayan knotweed
Persicaria wallichii
© 2015 Phil Pullen
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Persicaria wallichii
© 2015 Phil Pullen
Persicaria wallichii
© 2001 CDFA
Persicaria wallichii, a dicot, is a 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

one or more occurrences
within a 7.5-minute quadrangle

Plant Characteristics
and Associations



Bloom Period
Persicaria wallichii
© 2001 CDFA
Family: POLYGONACEAE  
Genus: Persicaria
Communities:
weed, characteristic of disturbed places, wetland-riparian
Habitat: disturbed [Walker]
Wetlands:Equally likely to occur in wetlands or non wetlands [U.S. Fish & Wildlife Service.]
Distribution by County 

Add an Observation of  Persicaria wallichii

Name Status:
Accepted by TJM2
Alternate Names:
(according to)

TJM2: Polygonum polystachyum
More information about  Persicaria wallichii
Photos on CalPhotos / Google Images
Jepson eFlora

Records from the Consortium of California Herbaria

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]. 2016. Berkeley, California: The Calflora Database [a non-profit organization].
Available: http://www.calflora.org/   (Accessed: Jul 27, 2016).

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