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
Conservation Status: Critically Imperiled in Washington (WANHP)
Achene 3-angled, black, smooth, shining, 2.5 mm. long, ovate in outline but tapered at both ends.