commonly known as crape myrtle or crepe myrtle, is a genus of around 50 species of deciduous and evergreen trees and shrubs native to the Indian subcontinent, southeast Asia, northern Australia, and parts of Oceania, cultivated in warmer climates around the world. It is a member of the family Lythraceae, which are also known as the loosestrife family. The genus is named after the Swedish merchant Magnus von Lagerström, a director of the Swedish East India Company who supplied Carl Linnaeus with plants he collected. These flowering trees are beautifully colored and are often planted both privately and commercially as ornamentals.

Crepe myrtles are chiefly known for their colorful and long-lasting flowers which occur in summer. Most species of Lagerstroemia have sinewy, fluted stems and branches with a mottled appearance that arises from having bark that sheds throughout the year. The leaves are opposite and simple, with entire margins, and vary from 5–20 cm (2–8 in). While all species are woody in nature, they can range in height from over 30 m (100 ft) to under 30 cm (1 ft); most, however, are small to medium multiple-trunked trees and shrubs. The leaves of temperate species provide autumn color.