The city flower of Tai'an City is common crape myrtle, also called Yangyang tree or crape myrtle, which is a kind of deciduous shrubbery or small arbor. There is a tree of crape myrtle aged over one hundred years in Luohanya (Arhat Precipice) Yard, its trunk twisted and gnarled like a curled-up dragon full of ancient style interest. Every year, there are red flowers on it from summer to autumn. When blooming, the flowers are splendid like fire, and when being swayed by the breeze, they quivers tenderly, which is too beautiful to be appreciated all at once. In recent years, the crape myrtle has been vastly planted in the streets, courtyards and scenic spots of Tai'an City, and it was appointed as its city flower.