Distribution: Chiefly east of the Cascades in Washington; southern British Columbia south to Washington, east to Idaho.
Habitat: Deeper soil in low to mid-elevations of open, dry areas, and under Ponderosa pine.
Conservation Status: Not of concern
Glabrous perennial from a thickened taproot, 1.5-3 dm. tall.
Well-developed leaves attached to the stem at or below the ground surface, ternate-pinnately dissected into small, narrow ultimate segments, often over 1 cm. long. Taproot usually elongate with two or more globose-thickened portions.
Inflorescence a compact, compound umbel, the rays very unequal, 1-4 cm. long at maturity; involucre none; involucel bractlets narrow, 2-3 mm. long; calyx teeth obsolete, flowers white with dark purple anthers; pedicels up to 4 mm. long.
Fruit broadly elliptic, glabrous, 7-12 mm. long, the lateral wings +-1/2 as wide as the body.