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Trees, deciduous. Leaves in spirals, usually even-pinnate or sometimes odd-pinnate; leaflets usually alternate; leaflet blades with margin entire. Thyrses axillary to subterminal. Flowers bisexual, oblong. Calyx short, 4-or 5-lobed. Petals 4 or 5, distinct, contorted. Staminal tube cylindric, slightly shorter than petals, apical margin entire or 10-crenate, lobes each bearing one anther; anthers exserted. Disk absent to narrowly cushion-shaped. Ovary 3-5-locular, with numerous ovules per locule; style thick; stigma capitate. Fruit a septicidal capsule, 3-5-locular, with 60-100 seeds per locule. Seeds flat, terminally winged; endosperm present; cotyledons leaflike, round; radicle exserted.
Trees with simple hairs. Leaves paripinnate with terminal leaflet represented by a spike, imparipinnate and bipinnate in juvenile plants. Inflorescence a thyrse, axillary but subterminal so as to appear terminal. Calyx 4-or 5-lobed. Petals 4 or 5, free. Staminal tube margin entire or crenulate; anthers 8–10, attached to margin. Ovary 3–5-locular, each locule with numerous ovules; stylehead capitate. Capsule 3–5-merous, woody; columella reaching capsule apex. Seeds numerous, with a terminal wing.
