Sophora japonica, alias Sophora japonica, Sophora japonica, Sophora alopecuroides, Sophora tenuifolia, and gold medicinal materials. , belonging to the family Papilionaceae. Sophora japonica is a good greening tree species, which is often used as street trees and shade trees, and has certain economic and medicinal value. It is used as the city flower in many areas.

Sophora japonica is a deciduous tree with a height of 6-25m, dark gray dry skin, green branchlets and obvious lenticels.

The length of pinnate compound leaves of Sophora japonica is 15-25 cm; Leaf axis is hairy and the base is enlarged; 9- 15 lobules, oval, 2.5-7.5 cm long, 1.5-5 cm wide, tapering at the top, broadly cuneate at the base, grayish white below, sparsely pubescent.

The panicle of Sophora japonica is terminal; Calyx campanulate, with 5 small teeth; The corolla is milky white, the flag is wide and heart-shaped, the claws are short, the pulse is purple, and the edge of the keel is slightly purple; Stamens 10, unequal in length.

Sophora japonica pods are fleshy, beaded, 2.5-20 cm long, hairless and indehiscent; Seed 1- 15, kidney-shaped.

Sophora japonica is mainly planted and propagated, and can also be cut. Spring sowing, because the seed coat has a fence layer closely combined with cells, has poor water permeability. Before sowing, the seeds were soaked in water with an initial temperature of 85-90 degrees for 24 hours, and the remaining hard particles were treated 1-2 times. Seeds can be sown when they absorb water and swell.

Sophora japonica is cool and bitter, and has the functions of clearing away heat and blood, clearing liver and purging fire to stop bleeding.

Sophora japonica has the characteristics of fast growth, hard material, elasticity, straight texture, easy processing, corrosion resistance, flower buds can be used as dyes, pulp can be used as medicine, and seeds can be used as feed. It is also a windbreak and sand fixation, timber and economic forest tree species, and is a good shade tree and street tree species in urban and rural areas.

Sophora japonica is an excellent nectar source plant; Extraction of industrial seed oil; The exocarp of Sophora japonica can extract stuffing sugar and so on. Wood is used to build or manufacture farm tools and furniture; It has strong resistance to toxic gases such as sulfur dioxide and chlorine. Sophora japonica has high economic value, its wood is water-resistant and moisture-proof, elastic, and its material is excellent. Its flowers can be used as medicine and pigment, and its seeds can be pressed to make soap. Sophora japonica is a symbol of auspiciousness, happiness and beauty, and it is a tree species that people in urban and rural areas like to plant since ancient times.