Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
Habitat: Shores and disturbed ground.
Flowers: July-September
Origin: Native
Conservation Status: Not of concern
[none provided]
PNW Herbaria: Specimen records of Polygonum ramosissimum ssp. ramosissimum in the Consortium of Pacific Northwest Herbaria database.
WA Flora Checklist: Polygonum ramosissimum ssp. ramosissimum checklist entry.
OregonFlora: Polygonum ramosissimum ssp. ramosissimum information.
E-Flora BC: Polygonum ramosissimum ssp. ramosissimum atlas page.
CalPhotos: Polygonum ramosissimum ssp. ramosissimum photos.
USDA Plants: Polygonum ramosissimum ssp. ramosissimum information.