Taxon  Report   10892 
Fallopia sachalinensis  (F. Schmidt ex Maxim.) Ronse Decr.
Giant knotweed
Fallopia sachalinensis
© 2001 CDFA
CalPhotos: click on a
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Fallopia sachalinensis
© 2001 CDFA
Fallopia sachalinensis
© 2001 CDFA
Fallopia sachalinensis, 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 / 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



Bloom Period
Fallopia sachalinensis
© Nick Kurzenko
Family: POLYGONACEAE  
Genus: Fallopia
Community:
escaped cultivar
Wetlands:Usually occurs in non wetlands, but occasionally found in wetlands [U.S. Fish & Wildlife Service.]
Distribution by County 

Add an Observation of  Fallopia sachalinensis

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

TJM2: Polygonum sachalinense
TJM2: Reynoutria sachalinensis
More information about  Fallopia sachalinensis
Photos on CalPhotos / Google Images

Jepson eFlora

Records from the Consortium of California Herbaria

USDA PLANTS Profile (POSA4)

Search the International Plants Names Index

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: Feb 12, 2016).

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