Perennial herb, 0.6-1 m tall. The root neck is stout, 1-1.5 cm in diameter, gray-brown, and retains most of the old sheath fibers; the root is conical, the end is thin, and often forked. Stems cylindrical, glabrous at the lower part, short hairs on the upper branches, and fleshy pith. Basal leaves with long petioles, petioles 5-15 cm long, with ovate-lanceolate sheaths at the base; leaf blade outline broadly ovate or triangular-ovate, three-split two to three times, the first pinna stalked , stalk length 3.5-6 cm, ultimate lobes rhombic-obovate, apex acuminate, base cuneate to truncate, sessile or short-stalked, margin with irregular 3-4 thick or round serrations, sometimes with shallow lower serrations lobed or deeply lobed, 1.5-6 cm long, 1.2-4 cm wide, with prominent veins on the lower surface, glabrous on both sides, or sometimes with sparse short hairs on the veins and margins on the lower surface; the lower leaves of the stem have short stalks, the shape of the blade Similar to cauline leaves; upper stem leaves sessile, leaf sheath slightly wider, margin membranous, leaf blade three-split, lobes narrow, base cuneate, middle one base deviated.
Compound umbels numerous, terminal or lateral, umbel diameter 3.5-9 cm; peduncle upper end with many short hairs; involucral bracts none or 1 to several, linear; ray 6-15, unequal length, 0.5-4.5 cm long, with short hairs on inner side; involucral bracts 8-12, ovate-lanceolate, on the same umbel, often different in width and size, longer than flower stalk, nearly equal to fruit stalk Long, with short hairs; umbels with 15-20 flowers; petals ovate, uvula incurved, white; calyx teeth inconspicuous; style short, curved, styloconical. The fruit is oval, flattened on the back, about 4 mm long, 3 mm wide, brown, with sparse short hairs, slightly protruding dorsal ridges, wing-like lateral ribs, narrower than the fruit body, slightly thicker; oil tube in the groove 3 -5, commissural surface vittae 6-10; endosperm ventral surface straight. The flowering period is August-September, and the fruiting period is October-November.
There are more seeds in Qianhu knot, and the germination rate of seeds is high, which can be used for seed propagation, seedling transplanting or live broadcasting. Generally, after the frost falls from September to October, when the fruit of the forehu is yellow and white, the fruit is mature. Cut off the mature husk with scissors and the pedicel, put it in the room and mature for a period of time, dry it and rub it, and rub the fruit. Then remove impurities, and then sieve and winnow for seeding.
