Taxon  Report   6746 
Polygonum cuspidatum  Sieb. & Zucc.   (not an active name; please see Fallopia japonica)
Japanese knotweed
Polygonum cuspidatum , a dicot, is a perennial herb that is not native to California; it was introduced from elsewhere and naturalized in the wild.

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

 

 Interactive Distribution Map 


 Observation Hotline 
 (observation details + photos)



 Distribution by County 

point, line, or polygon

one or more occurrences within a 7.5-minute quadrangle

 Plant Characteristics
 and Associations
Polygonum cuspidatum
© 2005 Louis-M. Landry
Polygonum cuspidatum
© 2006 Dr. Amadej Trnkoczy
Community: escaped cultivar
Wetlands:Usually occurs in non wetlands, but occasionally found in wetlands [U.S. Fish & Wildlife Service.]
Family: POLYGONACEAE  
Genus: Polygonum
Add an Observation of  Polygonum cuspidatum
Name Status:
Accepted by PLANTS + JM93
TJM2: accepted name: Fallopia japonica
 
 NOTE: Polygonum cuspidatum is not an active name in the Calflora species table.
 Information about  Polygonum cuspidatum  from other sources:
USDA PLANTS Profile (POCU6)

Photos on CalPhotos / Flickr / Google Images

website references on Google

Original Publication citation. on the International Plants Names Index

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 California Herbaria.
[web application]. 2014. Berkeley, California: The Calflora Database [a non-profit organization].
Available: http://www.calflora.org/   (Accessed: Oct 25, 2014).

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

Applications About Calflora Search for Plants
Calflora  -  1700 Shattuck Avenue   #198,   Berkeley, CA   94709  -  510 883-3148  -  CONTACT