Leafy herb, 3-5 m tall. Leaves 30-35 cm, oblong to spathulate, acute, pale green. Bracts green. Sepals 14-15 mm, oblong, pale green. Corolla lanceolate, much longer than the sepals, greenish-yellow. Lower staminode (labellum) c. 60 mm, reddish-yellow, spotted red, emarginate. Upper staminodes red, yellow or pinkish, c. 80 mm, spathulate, emarginate. Ovary warty. Capsule 12-23 x 10-20 mm, trigonal, muricate. Seeds globose, c. 5 mm in diameter, black or dark brown, shiny.