Cycas revoluta Thunb., an evergreen plant in the Cycas family, is palm shaped with a cylindrical trunk; The scales and leaves are triangular ovate in shape, with spines on the petiole. When young, they are densely covered with yellow brown felt; Nutritious leaves are ovate and narrowly lanceolate in shape; The male bulbous flower is cylindrical in shape. The seeds are oval in shape, red in color, with a smooth middle seed coat and an orange red outer seed coat when mature. The spore and leaf ball stage is from May to July, and the seeds mature from September to October According to legend, the development of Cycas requires the supply of iron. When it weakens, if iron powder is given, it will not be difficult to recover; It is called "Su Tie" because it has the same effect when nailed with iron nails into the stem.