How many kinds of crape myrtle are there?

Lagerstroemia speciosa is distributed from Southeast Asia to Oceania, with about 50 species. There are 16 species in China, which were cultivated as early as 1000 years ago. Propagation is usually accomplished by cutting and sowing. It can be planted in the open field in a wide area south of Beijing. Strong cold resistance and drought resistance; Born in lime soil and fertile sandy loam. I like warmth, humidity and plenty of sunshine. Avoid root water and poor drainage. Trees are very old, reaching 500 ~ 1000 years.