Why is crape myrtle ticklish? It is called the itch tree. Lagerstroemia indica is also called itch tree.

1. Reasons why Lagerstroemia indica is ticklish: After careful observation and experiments by predecessors, it is found that the branches of Lagerstroemia indica have a remarkable feature, that is, the roots and tops of branches are almost the same in thickness, and Lagerstroemia indica is more "top-heavy" than those trees and shrubs with obvious upper thickness and lower thickness. When scratching its branches gently, the vibration generated by friction is easily transmitted to the top branches and flowers through the hard branches, causing shaking, which will gradually accumulate and increase in amplitude. The phenomenon of "tickling" is also obvious in other flowering shrubs with inconspicuous thickness, such as: over-trimmed lilacs, pods and precious wood; On the contrary, if you are on some big Lagerstroemia speciosa stumps with obvious trunks and great differences in branch thickness, the phenomenon of being ticklish is not obvious. Sometimes, when you scratch your nails, the top branches don't move, and you are extremely numb.

2. Deciduous shrubs or small trees of Lysimachiaceae. Panicle was born at the end of the branch of the year, with white, purple, red and purple colors; Petals 6, nearly round, with shriveled edges, are connected with the flower base through thin long claws. Stamens numerous, born at the base of calyx tube. The capsule is nearly spherical, with persistent calyx at the base, green to yellow when it is young, purple-black when it is mature or dry, and cracked at the back of ventricle; Seeds have wings. Distributed in East China, Central China, South China and Southwest China. Native to Asia, it is widely cultivated in tropical and subtropical regions. The flowering period is from June to September, and the fruiting period is from September to June.

3. Lagerstroemia indica is graceful and colorful. The whole flowering period of the whole plant can reach 120 days or more. It is also an anti-pollution tree species resistant to various toxic gases and suitable for greening and garden viewing. And Lagerstroemia indica is a medicinal plant. According to Compendium of Materia Medica, its bark, wood and flowers have the functions of promoting blood circulation, dredging menstruation, relieving pain, reducing swelling and detoxifying. Seeds can be used as pesticides.