Climber. Leaves leathery, elliptic-oblong, 18 cm long, 8 cm broad, brown when dry, secondary nerves bent, distinctly joining, tertiary ones reticulate. ♂ Inflorescences simple, thick (7 mm), 5 cm long, axillary. ♂ Flowers obconic, 1½ mm long; sporophyll very shortly exserted, embedded in a dense hair tuft twice as long as the collars. Sterile ♀ flowers about 10 to each collar, ovate. ♀ Inflorescences cauline, simple, 9 cm long, 1 cm thick. ♀ Flowers 8-10 to each collar, embedded in a thick, long hair mass which is still more conspicuous than in the ♂ ones, globose, apiculate. Fruits shining, ellipsoidal, small, 2 cm long, 12 mm broad; outer envelop thinly fleshy, middle one leathery, inner one papery; hair masses twice as long and twice as large as in the flowering stage.
Dense humid forests close to rivers on clayey-sandy red and black soils, sometimes in secondary forests and overgrown Hevea rubber estates; mainly at low elevations but ascending to lower montane forests.
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