What are the shapes of Lagerstroemia indica?

The scientific name of the dwarf Lagerstroemia speciosa, alias: Baisuilan, a genus of the itch-loving family: Lagerstroemia speciosa. Dwarf Lagerstroemia indica has the physiological characteristics of wide cultivation area, warm and humid climate, cold resistance, drought resistance, waterlogging resistance, saline-alkali resistance, harmful gas resistance and strong stress resistance. From the ten years of cultivating dwarf Lagerstroemia indica in Henan Province, it can be seen that both big seedlings and small seedlings can safely overwinter. Branches with a high degree of lignification can withstand a low temperature of about -20℃. The optimum growth temperature is 15 ~ 40℃, and it can be planted in the north and south of China except in areas below -20℃. The fully lignified branches of one-year-old seedlings can withstand the low temperature of about-10℃, and the branches that are not fully lignified are frozen and die, and the branches retract. In August, 2002, the experiment of raising seedlings in Luoyang was carried out in the open field. Due to the short growth period and light lignification of the branches, all the above-ground parts froze to death in winter, and all sprouted from the roots in the following spring (April), which grew well.