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Description:
Hermaphroditic, unarmed, pubescent (esp. in juvenile condition) to glabrous, terrestrial, deciduous trees. Stems well branched, pachycaulous, the buds protected by bud scales. Leaves alternate, petiolate, the bases slightly clasping and/or minutely alate, stipulate or exstipulate; blades simple and palmately lobed, ovate, membranaceous (to subcoriaceous), the margins sharply toothed. Inflorescences terminal, erect, paniculate, the ultimate units umbellules; bracts foliaceous below, reduced above; pedicels long and slender, unarticulated. Calyx lobes 5, short triangular; petals 5, imbricate, free, stamens 5; carpels 2 (but unilocular, with an incomplete septum); ovary inferior, styles 2, free; the disc conical. Fruit dry, glabrous, ellipsoid to obovoid, strongly compressed laterally with 4–5 ribs on each face, 1(–2) seeded, mesocarp thin (1–4 cells) and parenchymatous, endocarp sclerified (fibrous). Endosperm shallowly ruminate.
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