JAPANESE KNOTWEED

Environmental & Community Biology 1h

Invasive Aliens

Japanese knotweed (Fallopia japonica)

[Also known as Polygonum cuspidatum]

Single young branch, showing characteristic zig-zag growth of the stem, with leaves about 15 cm long and flower clusters arising from the axils of the leaves.

Japanese knotweed plants lining the bank of the Water of Leith (near the Modern Art Gallery, Edinburgh)

Close-up of leaves and flowers

Websites on Japanese knotweed
Japanese Knotweed Alliance	Alien Plant Working Group, USA
Garden Web Europe	Alien Exotic Plants of Canada
Japanese Knotweed Control Forum for Cornwall	Weeds on the Web
Non-native Freshwater Plants, Washington, USA	USDA Forest Service
Top 20 Invasive Plants in New York State

Invasive Aliens pages on the ECB web:
Invasive alien investigative project list
Sycamore	Himalayan balsam	Oxford ragwort
Japanese knotweed	Giant hogweed

This site is no longer maintained and has been left for archival purposes

Text and links may be out of date

This site is no longer maintained and has been left for archival purposes

Text and links may be out of date