Distribution: Occurring in the east end of the Columbia River Gorge in Washington; south-central Washington to California.
Habitat: Vernal pools, seasonally damp ground at low elevations.
Flowers: June-July
Origin: Native
Growth Duration: Annual
Conservation Status: Threatened in Washington (WANHP)
Pollination: Bees, flies
[none provided]
PNW Herbaria: Specimen records of Polygonum parryi in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Polygonum parryi checklist entry
OregonFlora: Polygonum parryi information
E-Flora BC: Polygonum parryi atlas page
CalPhotos: Polygonum parryi photos