Distribution: Central Oregon to northeast California, east to Idaho and southcentral Montana.
Habitat: Dry to moist banks and flats, from sagebrush plains to lower mountains, often with ponderosa pine.
Flowers: June - August
Origin: Native
Conservation Status: Threatened in Washington (WANHP)
Achene 3-angled, black, smooth, shining, 2.5 mm. long, ovate in outline but tapered at both ends.
PNW Herbaria: Specimen records of Polygonum austiniae in the Consortium of Pacific Northwest Herbaria database.
WA Flora Checklist: Polygonum austiniae checklist entry.
E-Flora BC: Polygonum austiniae atlas page.
CalPhotos: Polygonum austiniae photos.
USDA Plants: Polygonum austiniae information.