Hemi-epiphytic vine. Stem: green with dark green grooves (seen in cultivation), internodes 3-6 cm long. Prophyll 12 x 0.8 cm, narrowly triangular, pale green to cream, becoming maroon. LEAVES: Petiole 6-15 cm long. Leaf blade 27-38 x 10-13 cm, obovate to oblong, base obtuse, apex acuminate (acumen sometimes 1.5-1.8 cm long), subcoriaceous, primary lateral veins 9-12; posterior divisions absent. INFLORESCENCE: 4 per floral sympodium, peduncle 4.5-6.5 cm long. Spathe 7.5-10 x 4-5 cm, ovate, strongly constricted, light green to greenish-cream. Spadix 8.5-9 cm long; male zone 5.5-6 cm long, white; male sterile zone 0.8-1.2 cm long; female zone 1-2 cm long. Flowers: stamens 0.8-1.2 x 0.7-1 mm, intermediate staminodes 1.2-1.8 x 1-1.6 mm, gynoecium 1-1.2 x 0.9-1.1 mm, ovoid, ovary 6-7-locular, uniovulate.