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Home  /  Plants  /  Budburst Species  /  Reynoutria japonica
Phenology Observation Sheet for Wildflowers and Herbs

COMMON NAME

Japanese knotweed

SCIENTIFIC NAME

Reynoutria japonica

ALSO KNOWN AS

Fallopia japonica

Plant family

Buckwheat (Polygonaceae)

Plant group

Wildflowers and Herbs

First used as an ornamental, this plant was introduced to the United States. It has been reported as invasive from Northeast North America down to Georgia and as west as California with some reports in Alaska.
20 reports
13+
OBSERVERS
20+
OBSERVATIONS
!

Identification hints

Plants are upright with 4-10 foot tall stems that are smooth and hollow. Leaves vary from oval to somewhat triangular. Flowers are small and white and produce fruits that have three wing structures.
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Did you know?

Although it is commonly found near water, it can tolerate a variety of shade and drought conditions making it a particularly pesky invasive.
DISTRIBUTION IN TH U.S.
There is no information available about this species.
HABITAT
There is no information available about this species.

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