Belladonna, alias: Solanum lyratum, Melilotus fragrans, Bie Radona grass, Latin scientific name: Atropa belladonna L. Solanaceae, Belladonna is a perennial herb, or because it is cultivated as an annual plant, its roots are thick and cylindrical. The lower part of the stem is single, purplish, and the upper part is forked with green buds. It originated in Europe and was introduced to China in 1930s. Belladonna is an infinite growth type. Perennial or annual herbs are used for cultivation. The root is an upright cylinder. The valve stem is flat and hollow cylindrical. Leaves alternate at the lower part of the stem, with short stalks and oval, oval or oval leaves. Like warm and humid climate, afraid of cold and avoid high temperature. It is cultivated in China, Shandong and Zhejiang. Slight gas, slightly bitter taste. It contains a variety of alkaloids and deadly toxins, and the whole herb can also be used as medicine, which is mainly used to stop night sweats, salivation, excessive bronchial secretion, hyperacidity and other diseases.