Characteristics
Reynoutria japonica Houtt. var. japonica
Japanese knotweed
Edges of streams, exposed gravel and sand bars in streams, floodplains, roadsides, and waste places. Often forming dense large monospecific stands. Widespread and often mixed with the hybrid Reynoutria ×bohemica
Herbaceous
Perennial
Vascular
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Often confused with Reynoutria ×bohemica. Many records of R. japonica are actually R. ×bohemica.
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Not Native
Naturalized
FACU (NWPL EMP)
FACU (NWPL NCNE)
SNA (State Rank)
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Classification
Eudicots
Caryophyllales
Reynoutria japonica Houtt. var. japonica - Japanese knotweed
Citation
Reynoutria japonica Houtt. var. japonica
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Species Distribution Map
This species has been reported in the counties highlighted in the interactive distribution map below. Click on a county to display its name.
Source
County
Year
Herbaria
Notes
Submission Info
Literature Citation (If Applicable)
No sources found
Synonyms
Synonym
Full Citation
Basionym
Type
Notes
No synonyms found
Plant Photos
