Deciduous tree, with rather crooked trunk, up to 35 m high with up to 14 m clear trunk, to 70 cm diam. Leaves obovate, dull with a waxy coating beneath, ca 30-45-nerved, 20-40 by 12-20 cm, with rounded, on young plants and saplings acute, apex, acute, gradually narrowing base, and entire to slightly dentate margin. Petiole 1½-4 cm long. Flowers solitary, rarely 2 or 3, at the end of short side-branches, near the basis of the peduncle with a number of bracts, flowering mainly before the appearance of the leaves. Flowers 14-16 cm diam. Sepals 5, elliptic, ca 30-38 by 20-30 mm. Petals bright yellow, 6½-8 by 4½-5½ cm. Stamens in 2 distinct groups, the outer ones yellow, ca 200-240, 12-13 mm long, straight in bud, the inner ones yellowish white, ca 40-55, 22-24 mm long, with their apex reflexed in bud. Carpels ca 9-11, ca 13 by 2 mm, with 20 mm long styles, each with 25-35 ovules. Fruit indehiscent, yellow or orange-coloured, approximately globular, 35-40 mm diam. including the enlarged fleshy sepals, which are up to 50 by 40 mm, 6 mm thick at the base. Carpels ca 25 by 10 mm, 1-to few-seeded. Seeds 5 by 3½ mm, exarillate, embedded in transparent slime.
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A tree 20-30 m tall. It loses its leaves during the year. The trunk is 70 cm thick. The leaves occur in rings and are deep green. The veins are easy to see. The leaves can be 30 cm long. The young leaves are a purplish-brown. The young twigs, leaves and flower buds have soft hairs. The flowers are 15 cm across. The fruit are oval and orange. They are 2.5-5 cm across. There are brown seeds in a clear pulp.
A tropical plant. It grows in clear forests at low altitudes. It can grow up to 1800 m altitude. It is best in humus-rich, well-drained soils. It needs a protected, shaded position. It is damaged by drought and frost.
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In secondary forests, on stony, periodically rather dry soils. Fl. at the end of the relatively dry period, about April in the Malay Peninsula, July to October in S. Sumatra and W. Java.
Open, secondary forest formations on stony, periodically rather dry soils.
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