Perennial herbs. Hairy roots. The stems are erect, 30- 100 cm high, spreading, with thick bristles and little hair. The basal leaves are big-headed pinnate compound leaves, usually with 2-6 pairs of leaflets, the petiole is 10-25 cm long, the petiole is coarse bristles, and the lobules are extremely unequal in size. The terminal lobule is the largest, rhombic, broadly ovoid or oblate, 4-8 cm long and 5- 10 cm wide. The tip is acute or obtuse, the base is wide, and it is heart-shaped to wide wedge-shaped. Cauline leaves are pinnately compound leaves, sometimes divided repeatedly, and the upward leaflets gradually decrease. The terminal leaflets are lanceolate or obovate-lanceolate, usually tapering at the top or short, and cuneate at the base. Stipules of cauline leaves are large, green, leaflike, oval, with irregular coarse serrations at the edges. Inflorescence terminal, scattered, pedicel pubescent or hirsute; The flower diameter is 1- 1.7 cm; Petals yellow, several round, longer than sepals; Sepals are ovate-triangular, the tip is tapered, the accessory sepals are narrow and lanceolate, and the tip is tapered with two cracks, which are 1 times shorter than sepals, and the outside is pubescent and villous; The style is terminal, the upper part of 1/4 is twisted, and it falls off from the twisted part when it matures, and the lower part of the fallen part is sparse. Aggregate fruit is obovoid, achene is covered with bristles, the persistent part of style is hairless, and there are small hooks at the top; Receptacle is short bristles, about 65438 0 mm long. The flowering and fruiting period is July -65438+ 10.