Knotweed stems have reddish-brown specks and resemble bamboo in appearance.

It's leaves are heart-shaped, and may sometimes be elongated. The flowers are pinkish-white or greenish-white, and form feathery clusters at the base of each leaf.

Download the Japanese Knotweed brochure here.

Look-alike weeds:

• Bamboo - has very narrow and elongated leaves.

Links:

Biological Control of Invasive Plants:
www.invasive.org/eastern/biocontrol/12Knotweed.html

BC Ministry of Agriculture and Lands
http://www.agf.gov.bc.ca/cropprot/weedguid/jknotweed2.htm