Tree of Heaven (Ailanthus)
Genus and species: Ailanthus altissima
Leaves: The leaves are pinnately compound, 12-24" (30-60cm) long and containing 13-25 paired leaflets that are each about 3-5" 7.5-13cm) long and 1-2" (2.5-5cm) wide. (View Measured Leaf) The leaflets are lance-shaped and have 2-5 teeth near broad base. Beneath each tooth, there is a gland dot. They are green on top, paler and hairy beneath.(View Leaves)
Bark: The bark is gray, rough and deeply furrowed. (View Bark) The twigs are short, light brown, and very hairy.
Fruit: The fruit is 1.5" (4cm) long, reddish-green or brown, narrow, flat, winged and contains one seed. They tend to hang in large clusters.(View Fruit)
Tree: The tree grows to be 50-80' (15-24m) tall, and has a spreading, rounded crown, and short branches, as pictured to the left.
Range and Habitat: These trees are native of China, however, they are commonly planted and spread across temperate North America. They can usually be found near waste places.
Tree of Heaven (Brandeis University, Waltham, MA, 9/30/02)