Plant: perennial plant 3-14 dm, glabrous to puberulent or minutely scabrous, ± glaucous; taproot stout, thickened; stem rarely 0; base with 1 or more scarious sheaths

Leaves: petiole 3-30 cm; blade 15-35 cm wide, triangular-ovate to round, ternate-pinnately dissected, segments 2-22 mm, linear-oblong; cauline leaves generally few, like basal

INFLORESCENCE: umbels compound, glabrous; peduncle 1.5-6 dm; bractlets several, > or < flowers, linear; rays 10-30, 3-10 cm, spreading; pedicels 1-20 mm

Flowers: small, few; calyx lobes generally 0; corolla maroon-red or yellow; petals wide, yellow, white, or purple, tips narrowed; stamens 5; pistil 1, ovary inferior, 2-chambered

Fruit: 2 dry, 1-seeded halves that separate from each other but generally remain attached for some time to a central axis, 12-16 mm, oblong-ovate to elliptic, glabrous, pumpkin-seed-like, very compressed front-to-back; wings thick, << body in width; marginal ribs widely to narrowly thin or thick-winged, others thread-like; oil tubes obscure; fruit axis divided to base; Seed: face flat to concave

Misc: Wooded or brushy slopes; 150-3000 m.