Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to Alberta and Wyoming.
Habitat: Dry to moist banks and flats, from sagebrush plains to lower mountains, often with ponderosa pine.
Flowers: June-August
Origin: Native
Growth Duration: Annual
Conservation Status: Threatened in Washington (WANHP)
Pollination: Bees, flies
Achene 3-angled, black, smooth, shining, 2.5 mm. long, ovate in outline but tapered at both ends.
Publication: Bull. Calif. Acad. Sci. 1: 212. (as austinae). 1885.
Polygonum douglasii Greene var. austiniae (Greene) M.E. Jones
PNW Herbaria: Specimen records of Polygonum austiniae in the Consortium of Pacific Northwest Herbaria database.
WA Flora Checklist: Polygonum austiniae checklist entry.
OregonFlora: Polygonum austiniae information.
E-Flora BC: Polygonum austiniae atlas page.
CalPhotos: Polygonum austiniae photos.
USDA Plants: Polygonum austiniae information.
