Plant: Plant 4.5-10 dm, annual, perennial herb, taprooted, glabrous or bristly; stem erect, branched Leaves: mostly cauline; petiole 3-8 cm; blade 5-15 cm, oblong- to triangular-ovate, pinnately dissected, segments 1-5 mm, linear-oblong, obtuse INFLORESCENCE: umbels compound; peduncles 0-2 cm; rays 3-6, 1-2.5 cm; bracts generally 0; bractlets several, reflexed, entire Flowers: many, small, outer sometimes ± bilateral; calyx lobes 0; petals narrow, white; stamens 5; pistil 1, ovary inferior, 2-chambered, generally with a ± conic, persistent projection or platform on top subtending 2 free styles Fruit: 2 dry, 1-seeded halves that separate from each other but generally remain attached for some time to a central axis,± 4 mm, ovate; beak << body, cylindric, beaked, smooth or bristly; each half ± cylindric; ribs, oil tubes 0 or obscure; fruit axis entire or notched at tip; Seed: face grooved Misc: shady places; 0-400 m.