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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!
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Japanese Knotweed (Polygonum cuspidatum)
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  • Japanese Knotweed (Polygonum cuspidatum), flower
  • Japanese Knotweed (Polygonum cuspidatum), flower

Image ID: 2014/mtr170

Japanese Knotweed (Polygonum cuspidatum)

leaf
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
All photos of this species
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