Taxon  Report   11010 
Persicaria lapathifolia  (L.) Gray
Common knotweed
Persicaria lapathifolia, a dicot, is an annual herb that is native to California.

 Interactive Distribution Map 

 Observation Hotline 
 (observation details + photos)

point, line, or polygon

 Plant Characteristics
 and Associations

Bloom Period
Persicaria lapathifolia
© 2008 Louis-M. Landry
Persicaria lapathifolia
© 2005 Luigi Rignanese
(many plant communities), wetland-riparian
Wetlands:Occurs almost always under natural conditions in wetlands [U.S. Fish & Wildlife Service.]
Genus: Persicaria
Distribution by County 

Add an Observation of  Persicaria lapathifolia

Name Status:
Accepted by TJM2
PLANTS: accepted name: Polygonum lapathifolium
Alternate Names:
(according to)

TJM2: Polygonum lapathifolium
 Information about  Persicaria lapathifolia  from other sources:

Nursery availability and horticultural info on CNPLX

Photos on CalPhotos / Google Images

website references on Google

Jepson eFlora (TJM2)

Records from the Consortium of California Herbaria

Search (Flora of North America)

Search the Lady Bird Johnson Wildflower Center

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]. 2015. Berkeley, California: The Calflora Database [a non-profit organization].
Available:   (Accessed: May 25, 2015).

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

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