The stone flower seed, also known as ice powder seed, belongs to panicum miliaceum of Solanaceae, with a plant height of about 6-12 cm and a purplish black stem. Leaves alternate, ovate, with coarse serrations at the leaf margin, axillary flowers, cup-shaped corolla, pink purple. Calyx persistent, heart-shaped, five-sided wing-shaped, shaped like a small lantern. Ice powder seeds are actually the seeds of ice powder trees. Ice powder trees will bear a kind of fruit called ice powder fruit. There are some grains in the ice powder fruit, which is often called ice powder seeds. Ice powder fruit looks like a small walnut. After being opened with pliers, it contains seeds smaller than sesame seeds. Ice powder seeds are a specialty in Sichuan and Chongqing, and can be used to make ice powder and other foods.