Herbs perennial, 1-1.5 m tall. Root conical, branched, pale yellow. Stem single, cylindrical, hollow, with longitudinal grooves and grooves. The leaves are membranous, the lower leaves of the stem are divided into pinnately one or two times, with 3-5 lobes, covered with sparse bristles, especially in the veins, the apical lobes are broadly ovate, 3-split, 8-13 cm long, on both sides The leaflets are smaller, nearly oval, 3-lobed, with wedge-shaped serrations and short convex cusps; the upper leaves of the stem are ovate, 3-lobed to 3-lobed, 3-8 cm long, 8-10 cm wide, with margins Uneven sawtooth.
Compound umbels terminal and lateral. The peduncle is 22-30 cm long, almost smooth; the involucral buds are few, long-lanceolate, 1-2 cm long, about 1 mm wide; the umbrella spokes are 16-18, unequal, 2-7 cm long, sparse pubescent; involucral bracts 5-8, line-lanceolate, 2-3.5 cm long, 1-2 mm wide, pubescent. Each umbel has about 20 flowers, stalks are slender; calyx teeth are not obvious; petals are white, two-shaped; The fruit is nearly round, 6-7 mm long, the dorsal and middle ribs are linear, and the lateral ribs are winged. Vitiligo 1 in each furrow on the back, rod-shaped, brown, half or slightly longer than the length of the meristem, with 2 on the commissure. The flowering period is May-July, and the fruiting period is August-September.
