Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Riparian zones, roadsides, ditches, wastelots, and other disturbed open areas.
Flowers: June-September
Origin: Introduced from Asia
Growth Duration: Perennial
Conservation Status: Not of concern
[none provided]
PNW Herbaria: Specimen records of Fallopia japonica var. japonica in the Consortium of Pacific Northwest Herbaria database.
WA Flora Checklist: Fallopia japonica var. japonica checklist entry.
OregonFlora: Fallopia japonica var. japonica information.
E-Flora BC: Fallopia japonica var. japonica atlas page.
CalPhotos: Fallopia japonica var. japonica photos.
USDA Plants: Fallopia japonica var. japonica information.
