tree of heaven (Ailanthus
altissima)
Family: Simaroubaceae
Form: Medium sized reaching 50 - 80 ft. in height and 1 - 2 ft. in dbh. Also has a rounded spreading crown.
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Leaves:
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Bark: Thin, gray, and smooth. Inner bark is bitter
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Twigs and buds: Twigs are stout and light brown. Lacks terminal buds.
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Flowers and fruit: Flower are staminate and greenish yellow. Fruit is a samara.
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Distinguishing characteristics: Smell for the burnt peanut butter scent. It's rachis and petiole are pubescent and it has a large compound leaf.
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Range: Native of China. Introduced in the 1780's and is now found almost throughout the entire lower 48 states.
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Silvics: It is shade intolerant and grows on dry uplands and poor sterile sites.
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Ecological and cultural importance: It is resistant to air pollution; native to China and planted in eastern US 1784; bark extract used as a tonic. Very invasive forming impenetrable thickets in open sunny area. A prolific seeder and tends to be allelopathic.
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