Hyericum L. is about 400 species all over the world, belongs to Clusiaceae. 55 species and 8 subspecies in 8 sections were reported in China, and the concentration region is located in southwest China. Many of them can be used as medicinal plants or ornamental plants. As for medicine, its main composition is hypericin and its derivatives which be used for antidepressant, depressing the central nervous system, and has immunotropic activity and marked anti-DNA virus and anti-RNA virus, therefore, i...