Tree, up to 40 m high with 20 m clean trunk, 75 cm diam., with gray to brown bark, scurfy with reddish scales, and red to dark brown heartwood. Leaves coriaceous, elliptic to oblong, ca 10-13-nerved, 15-30 by 7-10 cm, with rounded to acute, sometimes slightly acuminate apex, acute, often unequal-sided base, and slightly undulate, entire or dentate margin, glossy. Petiole 2-5 cm long. Raceme simple or composed, the only lateral branch at the place of the second flower, up to 12-flowered, sometimes some inflorescences crowded at the end of a branch and inflorescence therefore seemingly up to 30-flowered. Flower 1-10 cm diam., the pedicel distinctly thickened at the apex. Sepals 5, elliptic to ovate, 20-25 by 13-16 mm, glabrous to rather densely tomentose outside. Petals bright yellow, 40-50 by 25-33 mm. Stamens in 2 distinct groups, the outer ones ca 300, 10-11 mm long, straight in bud, the inner ones ca 30, 16-20 mm long, with their apex reflexed in bud. Carpels 5-10, usually 6-8, 12-14 by 2½ mm, with 16-20 mm long, pink styles, each with 20-25 ovules. Fruit dehiscent. Carpels 18-20 by 12-16 mm, yellowish green outside, whitish inside, 1-3-seeded. Seeds 6 by 4 mm, dark brown, with a 2-3 mm long, red, membranaceous aril.
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