Climber; stems slender, scabrid, often becoming glabrous at maturity, reddish-brown, longitudinally striate.. Leaf-blade oblong-elliptic to elliptic, 6–22 cm. long, 3–8 cm. wide, attenuate-acuminate, truncate to subcordate or sometimes auriculate, entire to irregularly undulate, with hydathodes present, coriaceous, glabrous and glossy above, very sparsely strigose beneath; midrib slightly raised above, prominent beneath; 4–7 pairs of secondary veins slightly raised above and prominent beneath; tertiary veins similarly raised above and prominent beneath; petiole 5–20 mm. long, twisted, used for climbing.. Flowers dioecious, in solitary axillary (or supraxillary in some female plants) spikes; peduncle up to 5.5 cm. long in male and 8.0 cm. in female, sparsely pubescent; bracteoles minute.. Male flowers sessile; perianth-lobes 4, ± deltoid, united at the base; stamens small; ovary replaced by a few coarse hairs.. Female flowers sessile; perianth-lobes as in male; ovary ovoid, attenuate at apex, pubescent; stigma sessile, fimbriate, persistent.. Fruits clustered at the apex of an enlarged peduncle up to 10 cm. long, ovoid, attenuate at the apex to form a beak, laterally compressed, 1.5–2.2 cm. long, 1–1.5 cm. across and up to 1 cm. thick, ± pubescent, orange-red when mature.
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