Hemi-epiphytic, sometimes terrestrial vine. Stem: apex green becoming chestnut-coloured in the mature parts, internodes 4-7 cm long. Prophyll 30 x 1.5 cm, reddish-cream, becoming brownish, narrowly triangular, sharply 2-ribbed. LEAVES: Petiole 45-70 cm long, green, becoming reddish-green towards to the apex. Leaf blade 45-48 x 26-34 cm, elliptic cordate, apex acute, base cordate to subsagittate, dark green, shiny on the adaxial surface, coriaceous; anterior division 26-37 x 16-25 (-31) cm, primary lateral veins 6-9 per side, interprimary veins distinct; posterior divisions 8-18 x 14-36 cm, acroscopic veins 0-2 per side, basioscopic veins 2-3 per side; basal veins 4-7, with none or rarely 1 free to base; posterior rib naked for 1.8-3.2 cm. INFLORESCENCE: 1-3 per floral sympodium; peduncle 4-5 cm long. Spathe 12-19 x 1.6-2.3 cm, boat shaped, not constricted, greenish-cream outside, cream with base reddish to wine-coloured inside. Spadix 13-17 cm long; male zone 6-8 cm long; intermediate male sterile zone 1.3-1.5 cm long; apical male sterile zone 0.8-0.9 cm long, female zone 5.8-6.5 cm long. Flowers: stamens: 1.8-2 x 1.2-1.8 mm, intermediate sterile stamens: 1.8-2 x 2-2.5 mm, apical sterile stamens 1.5-1.8 x 1.3-1.5; gynoecium 3.5-4 x 2-2.5 mm, ovary with 8-10 locules, 2-3 ovules per locule, placentation sub-basal. Berries 6-7 mm long, cream. Seed 1.5 mm long, ellipsoid.