What kind of flower is this?

Osmunda japonica belongs to litchi family, commonly known as "ticklish tree" , also known as skinless tree, full house red, hundred days red. Because of the special flowering period, flowers bloom constantly, hence the name Hundred Days Red. Northerners call crape myrtle "monkey thorn", which means the tree is too slippery for monkeys to climb. Its beauty lies in its lack of bark. The trunk of young Lagerstroemia indica has an annual epidermis and falls off by itself every year. The trunk looks fresh and smooth after the epidermis falls off. Old Lagerstroemia indica, the tree body does not revive the epidermis, and the tendons are quite exposed. Very smooth, very smooth. When Lagerstroemia indica grows up, the trunk epidermis falls off and is smooth and skinless. If people touch it gently, they will immediately shake the leaves, tremble all over, and even make a weak "giggle" sound. This is a whole-body reaction of its tickling. Ziwei * * * has four kinds: Chiwei, Yin Wei and Cuiwei. The blue petals are the best, which are panicles, bearing the top of new branches, 20 cm long and 6 petals per flower. The tree is full of flowers, gorgeous as a sunset, so it is also called full house.