The tree of heaven (Ailanthus altissima) is a fast-growing deciduous tree native to China. It can reach heights of 40 to 80 feet and has large, compound leaves that can grow up to 3 feet long. The tree produces clusters of small, yellow-green flowers in the summer, followed by winged seeds that can spread easily. This tree is often found in urban areas and disturbed sites, as it can thrive in poor soil conditions. While it is valued for its rapid growth and ability to tolerate pollution, the tree of heaven is also considered an invasive species in many regions, outcompeting native plants.