The Rhododendron polycladum belongs to Ericaceae (the Azalea family). It is a small evergreen tree that is distributed in the southwestern part of China, from the central part to the northwestern part of Yunnan province. This tree grows on the edge of pine forests with an altitude of 3000-4300 m, grasslands, and rocky areas, and is about 1.2 m high. The twigs are covered with short, flaky scales. The leaves are narrow elliptic to oblong, lanceolate, etc. and have a grayish green color. From May to June, small inflorescences are borne and mauve to bluish-purple flowers bloom. There are 9 to 10 stamens, about the same length as the corolla.