Large tree, up to 35 m high, 2 m diam., with buttresses to 3 m tall, 1 m long; bark reddish brown, flaky; wood reddish brown, hard and heavy. Leaves broadly ovate, ca 15-21-nerved, 11-30 by 7½-21 cm, with rounded apex, rounded, slightly cordate base, and slightly undulate margin. Petiole 4-9 cm long, with 4-8 mm broad wings. Raceme 2-6-flowered, up to ca 7 cm long. Flowers probably never quite expanding, the sepals only slightly diverging, the petals falling off without spreading. Sepals 5, ca 25 by 22 mm. Petals bright yellow, cucullate when falling, ca 33 by 28 mm. Stamens ca 100, 14-17 mm long. Carpels 8-11, ca 8-9 by 2-2½ mm, with 10-12 mm long styles, each with ca 14-18 ovules. Fruit dehiscent, the sepals enlarged to ca 35 by 30 mm. Carpels ca 25 by 18 mm, 1-seeded. Seeds ca 4 by 3 mm, enclosed by a 2½ mm long aril.
In primary forests, in New Guinea found only between 1300 and 1700 m, in New Ireland at low altitude.
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A canopy or sub-canopy tree in dense primary forests at elevations up to 1,700 metres.
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