Nicknames: mother-child head, mother-child grass, three-legged broken, mother-killing, wild cotton.
The strain is Urena lobata L., a female louse of Malvaceae, whose roots and whole grass (leaves) are used as medicine.
Perennial semi-shrub herb, ca. 1 m high. Stems erect, densely covered with white hairs. Simple leaves alternate, petiole length 1 ~ 2 cm; Stipules 2, strip-shaped, hairy; The shape and size of leaves vary greatly. Oval triangle, oval to round, 4 ~ 7 cm long and 2 ~ 6 cm wide, blunt at the top, heart-shaped at the base, sometimes wide wedge-shaped or blunt, undivided or 3 ~ 5-lobed, not exceeding the middle of the leaf. There are irregular double serrations at the edge, light spots along the inner surface of the leaf edge, pilose at the top, stellate villi at the bottom, and 3 ~ 7 palmately shaped main veins. Flowers in the axils of leaves in summer and autumn, with pedicels; Epicalyx 5; Petals 5, obovate-elliptic; It is about 1cm long, reddish, and the apex is obtuse; Stamens are numerous, and the base is connected into a tube; Pistil stigma 10 dehiscence. The capsule is spherical, with a diameter of nearly 1cm, and the schizocarp has hooked bristles.