Large liana. Leaves dark green, black when dry, leathery, of variable shape; secondary nerves bent, running out inconspicuously, not joining, the 2-3 lowermost approximate, tertiary venation indistinct (distinct only in the brown-drying var. funiculare). ♂ Inflorescences lax, branched, most so if cauliflorous, up to 12 cm long; spikes 4 cm long, 4 mm broad, their collars open. ♀ Flowers numerous (about 50), sporophyll 3 mm long, half exserted, the 2 sporangia narrow. Sterile ♀ flowers 6-8 in each collar, broadly conical. ♀ Inflorescences similar, up to 15 cm long, their spikes 8 cm long, their collars 3 mm spaced. ♀ Flowers 6-9, acuminate and bent upward, 4 mm long, inner envelop rather deeply split. Fruit pink, ellipsoidal, 1½-2½ by 1-1½ cm, distinctly stalked (axis of inflorescence elongated up to 30 cm); outer envelop shining, fleshy, fibrous, 2 mm in diam., middle one hard but thin, inner one papery. Seed broad-oblong.
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A large semi-climber. It grows from 5 to 20 m long. The branches are in pairs. The leaves are large-leaflets 20 x 56 cm. The spike like flower grows on old wood. The fruit is an oval nut. The outside of the fruit is green but turns red to orange.
Rainforests at elevations up to 1,800 metres. Mostly found in well drained primary and secondary forest on hill ridges and slopes; also in peat swamp and riverine forests; it is recorded to climb on Ficus and Shorea albida trees.
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A tropical plant. It grows in lowlands near mangroves. It can be up to 1,800 m above sea level.
Rainforest, ascending to 1800 m in Borneo, not rare.