Rhizome small, 2-4 x 1-2 cm, cylindrical to conical, non-aromatic, white inside; sessile tubers absent; roots many, fleshy; root tubers long, 10-1 8 cm, cylindrical, fleshy, white inside. Leafy shoot 30-45 cm, tall; pseudostem 10-15 cm tall, green or with violet tinge. Leaves distichous, straight; petiolate, petiole 10-20 cm long; lamina 27-35 x 10-15 cm, elliptic, coriaceous, partially folded along the midrib (plicate), margin hyaline base acute, tip acute to acuminate, alternate veins prominent, densely pubescent on both surfaces; ligule not prominent. Inflorescence lateral, later central; peduncle 5-10 cm long; spike 5-10 cm with a distinct coma. Coma bracts deep pink to violet. Fertile bracts 5- 6 x 2.5-3 cm, ovate-acute, slightly recurved, fused about halfway from the base, light green with light pink in the middle, extending towards the tip. Bracteoles 1.2- 1.5 cm long. Flowers 6 cm long, as long as or slightly longer than the bracts, yellow, 3-5 in each bract. Calyx tubular, 1.3 cm long, tip 3-lobed, deeply split on one side, pubescent. Corolla tube funnel-shaped, lobes unequal; dorsal lobe broader, concave, hooded at tip, bright yellow; lateral lobes linear. Labellum 2 x 2 cm, tip deeply split, lobes rounded, deep yellow. Lateral staminodes ovate-oblong, tip rounded, bright yellow. Anther thecae 4 mm long, with a small crest, spurred at base, spurs divergent, pointing forward. Epigynous glands two, 3 mm long. Ovary 2.5-3 x 2.5 mm. trilocular with many ovules, pubescent. Style long, filifonn; stigma faintly 4-lobed, bilipped. Fruit 1.2 x 0.7 cm, ovoid, slightly trigonal, pubescent. Seeds 3 x 2.5 mm, ovoid or ellipsoid with a basal constriction, smooth; aril lacerate, white.