Taxon  Report   10891 
Fallopia japonica  (Houtt.) Ronse Decr.
Japanese knotweed
Fallopia japonica, a dicot, is a perennial herb that is not native to California.

The California Invasive Plant Council classifies its potential impact on native ecosystems as moderate -- ALERT (plant profile).

 

 Interactive Distribution Map 


 Observation Hotline 
 (observation details + photos)



 Distribution by County 


© 2006 Dr. Amadej Trnkoczy

© 2006 Dr. Amadej Trnkoczy
 Plant Characteristics
 and Associations



Bloom Period
Community: escaped cultivar
Wetlands:Usually occurs in non wetlands, but occasionally found in wetlands [U.S. Fish & Wildlife Service.]
Family: POLYGONACEAE  
Genus: Fallopia
Add an Observation of Fallopia japonica
Name Status:
Accepted by TJM2
PLANTS: accepted name: Polygonum cuspidatum
Other Names:
(according to)

TJM2: Polygonum cuspidatum
TJM2: Reynoutria japonica
 Information about  Fallopia japonica  from other sources:
Photos on Picasa / Flickr / Google Images

website references on Google

USDA PLANTS Profile (POCU6)

2012 Jepson Manual Treament from the Jepson Herbarium,
University of California, Berkeley

Search efloras.org (Flora of North America)

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 Calif. Herbaria.
[web application]. 2014. Berkeley, California: The Calflora Database [a non-profit organization].
Available: http://www.calflora.org/   (Accessed: Apr 20, 2014).

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

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