1. Introduction

Height range: 15-20 (M) Deciduous tree. Odd-pinnate leaves, alternate, 7-25 leaflets, elliptic, oblong or ovate; stipules spinelike. Racemes, flowering in May, butterfly-shaped corollas. Pods, narrow oblong flattened, narrowly winged on one side, 3 to 10 centimeters long, russet, 3 to 10 seeds, black.

2. Origin

Native to North America. Northeast China, south of the Tieling, Liaodong Peninsula, Inner Mongolia, west to Sichuan, Yunnan, south to central China, Fujian and Xinjiang are cultivated for low mountain afforestation of excellent species, fast-growing, light-loving, resistant to dry and cold, arid and infertile soil. Can be used for sleepers, construction, vehicles, mining columns, charcoal timber; seeds containing about 12% oil, can be made of soap and paint raw materials; flowers containing aromatic oil; young leaves and flowers edible; bark can be paper and artificial cotton; stem bark, roots, leaves for medicinal purposes, diuretic, hemostatic effect. It is also a honey plant.