Fallopia japonica (Houtt.) Ronse Decr.

Japanese Knotweed

Fallopia japonica plant

Family - Polygonaceae

Stems - No info. yet.

Fallopia japonica stemNode of stem.

Leaves - No info. yet.

Fallopia japonica leavesUpper leaves.

Fallopia japonica leafLower leaf.

Inflorescence - No info. yet.

Fallopia japonica inflorescence

Flowers - No info. yet.

Fallopia japonica flowers

Flowering - August - September.

Habitat - Waste ground, fence rows, roadsides, railroads.

Origin - Native to Japan.

Other info. - This large, showy species can be found scattered throughout Missouri but is still mostly uncommon. It will most certainly spread with time. The plant is quite large and bushy, growing to +4m tall. It makes a good cultivated specimen but is hard to keep under control. When left undisturbed it spreads rapidly. The sprays of white flowers attract many insects.
F. japonica is considered a noxious weeds in many parts of the U.S.

Photographs taken in Marquette, MI., 9-8-03.


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