Climber up to 30 m by 10 cm. Branchlets sometimes transformed into hook-like organs, reddish brown. Branchlets, inflorescences, and young leaves always ferrugineous-pubescent. Leaves subcoriaceous to coriaceous, upper surface dull, olivaceous when dry, undersurface usually brownish, or reddish brown, pubescent on both surfaces, sometimes glabrescent; usually broad-elliptic and bluntish, 5.5-14 by 3-7 cm, obtuse or rounded at both ends, rarely short-acute; nerves 12-20 pairs, distinct and plane beneath, visible and impressed above, veins distinct beneath, obscure above; petiole 6-12 mm, pubescent. Inflorescences terminal, up to 30 cm long, flowers (4-)6-8(-14) on each ramification; leafy bracts chartaceous, oblong, 4-5 by 1-2 cm. Flowers c. 8 mm long, yellowish or whitish, short-pedicelled. Calyx lobes c. 2 mm long, 3 of them larger and ovate, 2 smaller and lanceolate. Petaloid appendages 10, linear, c. 0.75 mm. Stamens c. 8 mm, sessile or shortly filamentous. Pistil included, c. 3 mm long; ovary c. 2 mm; style short; stigma slightly capitate. Fruits ovoid, 1.25 by 0.5 cm.
Lowland forests. Dense, primary forests, forming tangled masses of growth in the trees; at elevations usually below 50 metres.
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