Epiphytic herb. Stem: apex green becoming straw-coloured in the mature parts, internodes 2-4 cm long. Prophyll 10.5 x 0.8 cm long, linear-lanceolate, colour unknown. LEAVES: Petiole 11-14.5 cm long. Leaf blade 28-30 x 10-11 cm, oblong, subcoriaceous, acuminate apex, base emarginate, primary lateral veins 3-5 per side, not very pronounced; posterior divisions absent. INFLORESCENCE: 1-3 per floral sympodium, peduncle 2.5-7 cm long. Spathe 10-13.5 x 3-3.3 cm, oblong, moderately constricted. Spadix 7-12.5 cm long; male zone 3-7 cm long; male sterile zone 0.7-1.5 cm long; female zone 2.5-4 cm long, green (colour according to the label). Flowers: stamens 0.7-1.5 x 0.4-1 mm; intermediate staminodes 1-2.5 x 0.7-1.5 mm; gynoecium 1-1.5 x 0.5-0.8 mm, ovoid, ovary with 6 locules, locules uniovulate, placentation basal. INFRUCTESCENCE: Berries not seen.