Sub-category: Smartweed family
Considered to be an invasive species, this plant can easily overwhelm an area. It is a large, herbaceous perennial plant. Hollow stems with distinct raised nodes that give it the appearance of bamboo, though it is not closely related. While stems may reach a maximum height of 3 to 4 m each growing season, it is typical to see much smaller plants in places where they sprout through cracks in the pavement or are repeatedly cut down. The leaves are broad oval with a truncated base, 7 to 14 cm long and 5 to 12 cm broad, with an entire margin. The flowers are small, cream or white, produced in erect racemes 6 to 15 cm long.
Found in waste areas, roadsides, along the edges of forests, lakes, and ponds. Often found in residential areas. Blooms in late summer and early autumn.