Polygonum cuspidatum Sieb. & Zucc.

Polygonum cuspidatum plant

Family - Polygonaceae

Stems - No info. yet.

Polygonum cuspidatum stemNode of stem.

Leaves - No info. yet.

Polygonum cuspidatum leavesUpper leaves.

Polygonum cuspidatum leafLower leaf.

Inflorescence - No info. yet.

Polygonum cuspidatum inflorescence

Flowers - No info. yet.

Polygonum cuspidatum 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.
P. cuspidatum is considered a noxious weeds in many parts of the U.S.

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