Rhizomatous herbs, rhizome light yellow inside, white towards the periphery with the smell of green mango; sessile tubers thick, 5-10 x 2-3 cm, cylindric or ellipsoid, branches horizontal; roots fleshy, root tubers absent. Pseudostem 30-35 cm tall. Leaves 4-6; lamina of lower-leaves much smaller, c. 18 x 8 cm, upper larger, 45-60 x 14-15 cm, oblong, lanceolate, acuminate, base equal, closely pinnately veined, lower surface puberulous, upper glabrous, tip hairy; petiole 5-10 cm long. Inflorescence lateral or central; peduncle 20-22 cm long, covered by 5-6 sheaths; spike 12-18 cm long. Coma bracts 5-8, c. 6 x 2.5 cm, fused only at the base, spreading, light violet. Fertile bracts 15-18, c. 4 x 3.5 cm, orbicular-obtuse, slightly recurved, lower 2/3 fused to form a pouch, green; bracteoles small. Flowers large, c. 5 cm long, 4-5 in each bract, longer than the bracts. Calyx truncate, 1 cm long, deeply cleft on one side, 3-lobed at the tip, minutely pubescent. Corolla tube funnel-shaped, 3 cm long, pale yellow, minutely pubescent; lobes unequal, white; dorsal lobe larger, 1.5 x 1.2 cm, hooded at the apex; laterals c. 1.4 x 1 cm long, tip rounded, glabrous. Labellum somewhat elliptic, c. 1.8 x 1.5 cm, 3-lobed, midlobe emarginate, recurved, pale yellow with a median dark yellow band, glabrous. Lateral staminodes c. 1.5 x 0.9 cm, apex slightly incurved, glabrous, pale yellow. Stamen white, thecae parrallel, 4 mm long, basal spur 1 mm long, slightly convergent, glabrous. Epigynous glands two, linear, 6 mm long, tip acute. Ovary trigonous, 3 mm long, tricarpellary, syncarpous, densely hairy; ovules many; style long, filiform; stigma closely appressed within the anther lobes.