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)



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
Distribution by County 

Add an Observation of  Polygonum cuspidatum

 
Name Status:
Accepted by PLANTS + JM93
TJM2 accepted name: Fallopia japonica
Alternate Names:
(according to)

PLANTS: Fallopia japonica
PLANTS: Pleuropterus cuspidatus
PLANTS: Pleuropterus zuccarinii
PLANTS: Polygonum cuspidatum var. compactum
PLANTS: Polygonum zuccarinii
PLANTS: Reynoutria 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 / Google Images

website references on Google
 

Records from the Consortium of California Herbaria

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]. 2015. Berkeley, California: The Calflora Database [a non-profit organization].
Available: http://www.calflora.org/   (Accessed: Jul 28, 2015).

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

News About Calflora Home
Calflora  -  1700 Shattuck Avenue   #198,   Berkeley, CA   94709  -  510 883-3148  -  CONTACT