Hemi-epiphytic, epiphytic or terrestrial vine. Stem: green apex becoming greyish-brown in the mature parts, internodes 1-5 cm long. Prophyll 17-20 x 2.5-3 cm, triangular to narrowly triangular, green to greenish-cream to greenish-vinaceous, frequently with vinaceous extrafloral nectaries. LEAVES: Petiole 37-65 cm long. Leaf blade 40-60 x 25-38 cm, ovate-sagittate, apex acute, base sagittate to cordate, chartaceous to subcoriaceous; anterior division 29-40 x 25-38 cm, primary lateral veins 5-8 per side; posterior divisions 9-22.5 x 10-22 cm, acroscopic veins 0-1 per side, basioscopic veins 2 per side; basal veins 3-5 per side, none free to base; posterior rib naked for 3-5.5 cm. INFLORESCENCE: 1-3 per floral sympodium, peduncle 9-20 cm long. Spathe 14-21 x 4-4.5 cm, boat-shaped, weakly constricted, outside green with white grooves on the blade and greenish-vinaceous at the base, inside cream on the blade and vinaceous at the base. Spadix 12-13.5 cm long, male zone 8-8.5 cm long, cream; male sterile zone 0.8-1 cm long, cream; female zone 4-4.5 cm long, pale green. Flowers: stamens 0.7-1.2 x 0.4-1 mm, staminodes 1.2-2 x 1-1.6 mm; gynoecium 2.8-3.5 x 0.8-1.2 mm, ovoid, ovary 5-locular, ovule 1 per locule, placentation basal. INFRUCTESCENCE: Berries not seen.