Warning! This is an
invasive plant, which has the potential to aggressivley crowd out native species. Learn
more about invasive plants!
Japanese Knotweed (Polygonum cuspidatum)
Image ID: sj12
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Other common names: Japanese Bamboo
Invasive
Family:
Polygonaceae (Buckwheat)
Height: 3 to 7 ft.
Blooms: August to
September
Leaf Type:
smooth
Bloom Size: 0.13 in. (typical)
Flower Description:
Elongate clusters,
Regular blooms, 5 parts
Location: Samuel Justice Trail
Date: 8/31/2002
More photos of this flower
Folklore, History, and Other Facts
This aggressive invasive plant can grow at a rate of up to four inches per day, and has become a substantial along many trails.
We started out as wildflowers from the bicycle trails of western Pennsylvania, but we've
grown!
Meyer, Joseph E. (1918). The Herbalist and Herb Doctor. Hammond, Ind.: Indiana Herb Gardens. 400 pp.
