Chuanqianliu is a small evergreen tree in the family Myrtle, belonging to the genus Melastomataceae. Plant height 2-5 meters; Bark cracking; The tender branches are cylindrical in shape, with slender and drooping branches; The leaves are leathery, ranging from lanceolate to linear lanceolate, with a pointed or short apex and a narrowed base. Both sides are densely covered with black glandular dots; The spike shaped inflorescence is dense, with silk hairs on the inflorescence axis, membranous petals, nearly circular in shape, light green in color, and numerous stamens arranged densely; Capsule bowl shaped or hemispherical Flowering period from April to September; The fruiting period is from May to October. Due to the dense brush bottle like formation at the top of the spike shaped inflorescence, it is also known as the "bottle brush subtree".

Callistemon rigidus R. Br. is an evergreen small tree species in the family Myrtle, belonging to the genus Callistemon rigidus. The bark of the red bark is hard, gray brown, and the tender branches have edges. At first, there are long hairs, but soon it becomes hairless; Leaves are hard and leathery, linear; The spike shaped inflorescence grows at the top of the branch, with green, oval shaped petals, bright red stamens, dark purple anthers, and elliptical shapes; Half spherical capsule; Seed strip; The flowering period is from June to August.

Callistemon rigidus R. Br. is an evergreen small tree species in the family Myrtle, belonging to the genus Callistemon rigidus. The bark of the red bark is hard, gray brown, and the tender branches have edges. At first, there are long hairs, but soon it becomes hairless; Leaves are hard and leathery, linear; The spike shaped inflorescence grows at the top of the branch, with green, oval shaped petals, bright red stamens, dark purple anthers, and elliptical shapes; Half spherical capsule; Seed strip; The flowering period is from June to August.

Ormosia emarginata (Hook.&Arn.) Benth, It is a small evergreen tree of the dicotyledonous plant class, legume family, and red bean genus, with flattened pods and a flowering period from May to June. Born in mixed forests on hillsides and valleys. The concave leaf red bean wood is of excellent quality and can be sliced and veneered with veneer. It is a precious material of three types in Hainan. The pod is flat, black brown or black, diamond shaped or oblong, measuring 3-5.5 cm in length and 1.7-2.4 cm in width, with pointed ends. The neck of the fruit is 2-3 mm long, and the petals are woody with septa on the inner surface. There are 1-4 seeds.