Slender climber up to c. 20 m, containing red sap. Root tuberous. Stem herbaceous, glabrous. Leaves with glabrous petioles (3-)6-22 cm; lamina broadly triangular-ovate, margin often slightly lobed, 6-20 by 6-20 cm, apex obtusely mucronulate, base slight-ly cordate; lower surface rather pale with a darker ve-nation (in sicco usually reddish brown) very minutely papillose, otherwise glabrous; upper surface usually darker, glabrous; submembranous. Male inflorescences an axillary, peduncled, umbelliform cyme, 6-15 cm, papillose (occasionally glabrous), usually solitary. Male flowers yellow to orange with pedicels 1-2 mm; sepals 6, papillose outside, outer 3 ob-lanceolate, 2-2.5 mm long; inner 3 obovate, ungui-culate, 2-2.5 mm long; petals 3, obdeltoid-obovate, 1.25-1.5 mm long, glabrous; synandrium 1-1.75 mm long. Female inflorescence similar to male. Female flowers with pedicels about 1 mm, asymmet-rical; sepal 1, elliptic-oblong to obovate, 1-1.25 by 0.5 mm, papillose or glabrous outside; petals 2, ± suborbicular to obdeltoid, 0.5-0.75 mm Ø, glabrous. Sepal and petals on one side of the flower; carpel ± ellipsoidal, 1 — 1.5 by 0.5-0.75 mm. Drupe red with pedicels up to 7 mm, obovate in outline, 6-9 by 5-6 mm. Endocarp perforate, dorsally bearing 4 longitu-dinal rows of 12-16 papilliform processes.
Scattered, but locally common, in forest on hillsides, plains and mountains, sometimes on limestone, at elevations up to 1,600 metres.
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On hillsides, plains and mountains, scat-tered in forests up to 1600 m. On limestone in Malaya.
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