Tree, up to 60 m high, bole occupying c. 3/4 of the length, up to 75(-175) cm ø; bark smooth, light brown or grey; crown dense. Leaves 2-9-jugate (apical leaflet mostly vestigial), c. 30-200 cm long; leaflets very oblique, usually falcate and acuminate with an obtuse tip, glabrous above, sometimes more or less pubescent beneath, especially on the midrib and the 6-13 pairs of nerves, 10-40 by 4-15 cm; usually a few black, flat, orbicular or oblong glands c. 0.5-5 mm ø mostly near the base of the undersurface sometimes seemingly separated from the parenchyma as a loose membrane; petiole glabrous or puberulous, 5-20 cm; petiolules glabrous or puberulous, 0.5-1.5 cm. Panicles loose, up to c. 40 cm or more, glabrous or pubescent. Bracts small, triangular, very early caducous. Pedicels up to c. 15 mm in anthesis. Calyx more or less pubescent, closed in bud, rupturing and toothed irregularly, rarely cupular, 1-4 mm high, rarely caducous. Petals puberulous, acute or bluntish, up to c. 9 by 3 mm. Filaments with many long spreading hairs to glabrous, usually thickened downwards, c. 0.5 mm in female to 4 mm long in male; anthers c. 1 mm in female to 2.5 mm long in male. Carpels 5, usually densely puberulous; styles 5, connate at the base, including the long, stellately spreading stigmas, up to c. 6 mm long. Samaras (1-)3-5, with obtuse apex, more or less prominently reticulate or lengthwise striate, c. 11-22 by 2.5-5 cm; main vascular bundle to the seed in the adaxial margin; scar of the style beneath the seed; pedicel 2¼-5cm.
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A tree. It can grow to 55 m tall. The trunk can be 65 cm across. The bark is smooth and light brown. The leaves are compound with 2-9 leaflets. The leaflets are 10-40 cm long. They can be hairy underneath. The fruit are narrowly oval and 22 cm long.
See Ailanthus integrifolia Lam. subsp. integrifolia
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