Platycodon grandiflorum is a perennial herb with a height of 40-50 cm and milky white. Roots stout, long inverted cone, yellow-brown epidermis. Stems erect, simple or branched. Trifoliolate, sometimes opposite or alternate, ovate or ovate-lanceolate, 2.5-4 cm long and 2-3 cm wide, with acute apex, wide wedge-shaped base, sharp serrated edge, green at the top, glabrous, gray-blue at the lower part, short and thick along the vein, sessile or subsessile.
The orange pit is slightly oval, with a length of 0.8~30px and a diameter of 0.4 ~ 15px. The surface is yellowish-white or grayish-white, smooth, with ridged lines on one side, one end blunt and rounded, and the other end tapering into a petiole. The exocarp is thin and tough, the endosperm is thin and light brown, and the cotyledons are 2, yellow-green, oily. Slight breathing and bitterness.