General characteristics: annual herb, up to 50 cm high

Leaves: long-stalked, membranous, egg-shaped rhombus or oval, 2.5-8 cm long, 1.5-wide 3.5 cm, slightly rough on both sides, apex acuminate, base wedge-shaped, 3-veined, with blunt teeth on the edge.

Flowers: The male inflorescence is very short, 2-10 mm long. This inflorescence is hidden in the leaf-like bracts. When the bracts are unfolded, they are kidney-shaped, about 1 cm long, like a clam when closed, with edges. Bluntly serrated, heart-shaped base. Flowering period: May-July.

Fruit: The capsule is small and covered with coarse hairs. "Chinese Materia Medica"