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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: 2014/mtr170

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Other common names: Japanese Bamboo
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: Montour Trail
Date:  5/4/2014
Notes: new shoots
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We started out as wildflowers from the bicycle trails of western Pennsylvania, but we've grown!