The lenticels are round to oval; Branches with small warts. Leaves flat, bipinnately compound. Flowers are yellow dyes. Wood can be used to make furniture; Distributed in the Yangtze River basin and the southern and southwestern provinces of North China.
Extended data:
1, cold:
After winter, newly planted trees should be protected against cold. The method is to build a strong windbreak wall and leave an opening in the south for the sun to receive sunlight. In addition, the ground is covered with a layer of straw to prevent the roots from freezing. In North China, not only the newly transplanted Luan tree should be protected against cold, but also the trunk should be protected against cold every year after it survives. The method is to wind the straw rope from the rhizosphere to the branch point, and only in this way can the survival rate of trees be guaranteed.
2, pruning:
Luan tree has a straight crown, and its natural tree shape is often used in gardens. The newly planted trees keep 3 to 5 main branches evenly distributed, with a short cut of 25 cm to 40 cm, and each main branch keeps 2 to 3 side branches. Cut off dead branches, diseased branches or excessively dense branches at any time during maintenance.