Large, flaky-barked trees. Buttresses low, broad, rounded, single or grouped in twos to fours round the base of the bole. Young parts caducous, inflorescence persistently multicellular glandular tomentose. Stipule subulate, subpersistent. Inflorescence cymose. Flower sepals subequal, imbricate, fused at the base to form a shallow cup free from the ovary. Stamens 25-30; filaments compressed, dilated at base, tapering and filiform below the anthers; anthers oblong to ovoid, latrorse; appendage to connective filiform, many times length of anthers. Ovary ovoid, without distinct stylopodium; style about twice as long as ovary, trifid towards apex; stigma minute. Fruit calyx with a distinct basal cup enclosing but not fused with the nut; lobes valvate, chartaceous, 2 considerably longer than the other 3. Nut ellipsoid, 3-angled, splitting into 3 valves at germination, with short acute apical style remnant, tapering and narrow at base. Seed with distinct arillode. Germination epigeal; cotyledons subequal, cordate.
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