tree-of-Heaven Simaroubaceae Ailanthus altissima (Mill.) Swingle Listen to the Latin symbol: AIAL Other Fact Sheets
Leaf: Alternate, pinnately compound, 1 to 3 feet long, with 11 to 41 leaflets, leaflets are 2 to 6 inches long, pointed at the tip with large, glandular teeth near the base, green above and below.
Flower: Species is dioecious; small yellow-green, in long (6 to 12 inches) clusters, males have a disagreeable odor, appearing in late spring to early summer.
Fruit: An oblong, twisted samara, 1 to 1 1/2 inches long with the seed in the center, hanging in long clusters, ripens in late summer and disperse through the winter.
Twig: Stout, yellow to red-brown, with fine velvety hairs when young, easily broken with a large reddish brown pith; buds are relatively small and half-spherical sitting above large, heart-shaped leaf scars; terminal bud is absent. Strong odor (some are reminded of peanut butter) when broken.
Bark: Thin, light brown to gray, resembles the skin of a cantaloupe when young, later turning darker gray and rough.
Form: A short to medium sized tree to 70 feet with heavy, open branches. Lower branches on larger trees tend to droop. Often grows in clumps.

Looks like: smooth sumac - black walnut - Kentucky coffeetree - poison sumac
leaf flower fruit twig bark form map
Additional Range Information:
Ailanthus altissima is planted in the USDA hardiness zones shown above and may seed into the landscape. See states reporting tree-of-Heaven.
More: Fall Color
External Links:
USDAFS Silvics of North America
USDAFS Additional Silvics
USDA Plants Database
Horticulture
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Photos and text by: John Seiler,
Edward Jensen, Alex Niemiera,
and John Peterson
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