Sorghum is an annual herbaceous plant of the genus Sorghum in the Asteraceae family. The stem of Cang'er is covered with gray white rough hairs; Leaves triangular ovate or heart-shaped, with irregular coarse serrations on the edges, and pale white below; The male inflorescence is spherical, with many male flowers and a bell shaped corolla. The female inflorescence is elliptical with a sac like inner layer, green, light yellow green, or reddish brown in color; Mature bracts with achenes ovate or elliptical in shape; Skinny fruit, inverted oval shape; The flowering period is from July to August; The fruiting period is from September to October. [9] Because its son is like ear nitrate, it is named "ear". After ripening, it has a green black color, that is, pale color, hence the name Cang'er.