Mountain bamboo (Latin name: Garcinia mangostana L.), also known as mangji persimmon, mountain bamboo, mountain bamboo, and inverted twisted seed, is a small tree plant in the genus Tenghuang of the family Tenghuang. It is a small tree, 12-20 meters tall, with many and dense branches, alternating and opposite growth, and small branches with obvious longitudinal ridges. The leaves are thick and leathery, glossy, elliptical or elliptical rectangular in shape, 14-25 cm long and 5-10 cm wide, with a short pointed tip and a wide wedge-shaped or nearly circular base. The midrib is raised on both sides, and the lateral veins are dense, with up to 40-50 pairs, connected within the edges; The petiole is thick and about 2 centimeters long, with dense transverse wrinkles when dry