Large tree. Young twig, panicle, leaf bud, stipule outside, petiole and leaf beneath shortly evenly +-persistently gold-tomentose. Twig to 6 by 2.5 mm ø apically, compressed, becoming terete, smooth; stipule scars initially to 2.5 mm long, cuneate, horizontal. Leaf bud 5-8 by 2.5-5 mm, ovoid, compressed, obtuse. Stipule to 25 by 7 mm, hastate, acute. Leaves 13-20(-30) by 6-10(-12) cm, oblong, chartaceous; base cordate; acumen to 8 mm long, broad; nerves 16-20 pairs, curved, at 45°-65° along midrib and to 120° at base; tertiary nerves densely scalariform, at 90° to nerves; midrib prominent and terete beneath, rather narrow, ± applanate above; petiole 2.5-3.5 cm long. Panicle to 12 cm long, terete or compressed, terminal or axillary, singly branched; bracteoles to 7 by 2 mm, oblong, subacute, densely pubescent outside, sparsely so within. Flower bud to 12 by 4 mm, lanceolate. Calyx densely shortly greyish pubescent outside, glabrous within; lobes narrowly deltoid, subequal, ± patent, the 2 inner slightly shorter, thinner, slightly expanded at base. Corolla shortly pubescent on parts exposed in bud; petals linear, subacute. Stamens 15, the 5 inner somewhat longer than the others; filaments united in the basal half, tapering to the anthers in the distal half; anthers oblong; appendage to connective over twice as long as anthers, not reflexed. Ovary narrowly ovoid-conical, glabrous; stylopodium somewhat longer than ovary, thickened in the distal half; style stout. Fruit pedicel to 6 mm long, stout. Fruit calyx glabrescent or persistently puberulent at base; 3 longer lobes to 23 by 3.3 cm, spatulate, narrowly obtuse, to 1.8 cm broad above the to 2 by 2.5 cm broadly ovate saccate thickened base; 2 shorter lobes to 15 by 1.2 cm, linear, similar at base, base enveloped by larger lobes. Nut to 4.2 by 2.5 cm, ovoid, persistently shortly evenly yellowish buff pubescent; style remnant acute.
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A large tree. It grows 60 m tall. The trunk can be 160 cm across. It has buttresses 2 m tall. The leaves are oblong and 13-20 cm long by 6-10 cm wide. The base is heart shaped and they are golden woolly underneath. The flowers are in groups in the axils of leaves or at the ends of branches. The fruit is an oval nut with yellowish hairs. There are 3 longer calyx lobes 23 cm long by 3.3 cm wide and 2 shorter lobes.
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