Fallopia japonica
Family: Polygonaceae
Japanese knotweed
[Reynoutria japonica Houtt.,  more]
Fallopia japonica image
Emmet J. Judziewicz  
Etymology: Fallopia: for Gabriello (Gabriele) Fallopia, 16th century Italian anatomist who discovered fallopian tubes
Plants: erect to arching, perennial, 4'-10' tall, stout, shrub-like forb; speading by the long rhizomes to form clones up to several acres; stems hollow, bamboo-like, round in cross section
Leaves: alternate, up to 6" long; broadly oval with pointed tip and a straight base
Flowers: white to greenish, 5-parted, petals and petal-like sepals; inflorescence of many 3"-6" branched clusters from the upper leaf axils
Fruits: dry, 3-angled seed
Habitat: shores, grasslands, woods
Invasiveness: Restricted Invasive - Eradicate!
Conservation Status: Introduced - persisting and spreading; ecologically invasive
Fallopia japonica image
Steve C. Garske  
Fallopia japonica image
Steve C. Garske  
Fallopia japonica image
Paul Skawinski  
Fallopia japonica image
Steve C. Garske  
Fallopia japonica image
Paul Skawinski  
Fallopia japonica image
Emmet J. Judziewicz  
Fallopia japonica image
Paul Skawinski  
Fallopia japonica image
Steve C. Garske  
Fallopia japonica image
Matthew L. Wagner  
Fallopia japonica image
Paul Skawinski  
Fallopia japonica image
Stephen L. Solheim  
Fallopia japonica image
Fallopia japonica image
Fallopia japonica image
Matthew L. Wagner  
Fallopia japonica image
Paul Skawinski  
Fallopia japonica image
Steve C. Garske  
Fallopia japonica image
Stephen L. Solheim  
Fallopia japonica image
Fallopia japonica image
Fallopia japonica image
Fallopia japonica image
Emmet J. Judziewicz  
Fallopia japonica image
Paul Skawinski  
Fallopia japonica image
Paul Skawinski  
Fallopia japonica image
Steve C. Garske  
Fallopia japonica image
Fallopia japonica image
Fallopia japonica image
Fallopia japonica image
Fallopia japonica image
Emmet J. Judziewicz  
Fallopia japonica image
Paul Skawinski  
Fallopia japonica image
Steve C. Garske  
Fallopia japonica image
Steve C. Garske  
Fallopia japonica image
Fallopia japonica image
Fallopia japonica image
Fallopia japonica image
Fallopia japonica image
Fallopia japonica image
Fallopia japonica image
Fallopia japonica image
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Fallopia japonica image
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Fallopia japonica image
Fallopia japonica image
Fallopia japonica image
Fallopia japonica image
Fallopia japonica image
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Fallopia japonica image
Fallopia japonica image
Fallopia japonica image
Fallopia japonica image
Fallopia japonica image
Fallopia japonica image
Fallopia japonica image
Fallopia japonica image
Fallopia japonica image
Fallopia japonica image
Fallopia japonica image
Fallopia japonica image
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Fallopia japonica image
Fallopia japonica image
Fallopia japonica image
Fallopia japonica image
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Fallopia japonica image
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