Cang'er specimen

Xanthium sibiricum is an annual herbaceous plant of the genus Xanthium in the Asteraceae family. The stem of Xanthium sibiricum is covered with gray white rough hairs; Leaves triangular ovate or heart-shaped, with irregular coarse serrations at the edges, and pale white below; The male head inflorescence is spherical, with many male flowers and a bell shaped corolla. The female head inflorescence is elliptical, with an inner layer of sacs, green, light yellow green, or reddish brown; Mature bracts with achenes ovate or elliptical in shape; Achenes, obovate; The flowering period is from July to August; The fruiting period is from September to October. [9] Due to its son being like ear nitrate, it is named "ear". After ripening, it turns green and black, which is also known as Cang Se, hence the name Cang Er.