Phellodendron amurense Rupr. (Scientific name: Phellodendron amurense Rupr.) (Famous Doctors) Aliases: Barberry (Shen Nong's Materia Medica), Phellodendron amurense (Compendium of Materia Medica), Huang Bo Thun, Huang Bo Li, Yuan Bai (Northeast Provinces), Guan Huang Bai ( National Compilation of Chinese Herbal Medicine), Cork (all parts of the South). It is a deciduous tree of the genus Phellodendron in the Rutaceae family. The bark is gray-brown to black-gray, and the cork layer is developed, soft, and the endodermis is bright yellow; the branchlets are orange-yellow or pale yellow-gray. , Opposite or nearly alternate; flowers are unisexual, dioecious, cyme-shaped panicles terminal; flowers are small, yellow-green, petals oblong, ovary obovate, berry-shaped drupe subglobose, black when mature , Has a special aroma and bitter taste; the seeds are semi-ovate and black.
The cork layer is the material from which the cork is made. The wood is hard, the sapwood is light yellow, and the heartwood is yellow-brown. It is an excellent material for gunstocks, furniture, and decoration, and it is also a plywood. The fruit can be used as an insect repellent and dye. The seeds contain 7.76% oil, which can be used to make soap and lubricating oil.

The inner layer of the bark is processed and used as medicine. Bitter taste, cold in nature. To clear away heat and detoxify, relieve fire and damp dampness. Indications include acute bacillary dysentery, acute enteritis, acute jaundice hepatitis, urinary system infection and other inflammations. External use to treat fire and scald, otitis media, acute conjunctivitis, etc.