Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to the northern Great Plains.
Habitat: Dry to moist forest openings and meadows from moderate elevations to the subalpine.
Flowers: June-August
Origin: Native
Conservation Status: Not of concern
Pollination: Bees, flies
[none provided]
PNW Herbaria: Specimen records of Polygonum sawatchense ssp. sawatchense in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Polygonum sawatchense ssp. sawatchense checklist entry
OregonFlora: Polygonum sawatchense ssp. sawatchense information
E-Flora BC: Polygonum sawatchense ssp. sawatchense atlas page
CalPhotos: Polygonum sawatchense ssp. sawatchense photos