A large terrestrial herb to 1.5 m tall; rhizome short; roots fleshy, 2-3 mm in diameter. Stem to 1 cm in diameter, pubescent, 9- to 10-leaved, densely pubescent, covered below by several sheaths, 2.5-9.5 cm long, pubescent. Leaves erect-spreading, slender, elliptic-lanceolate or oblong-elliptic, acuminate, 21-33 cm long, 7.7-10.5 cm wide, glabrous above, pubescent on and between the veins beneath, margins more or less ciliate, gradually narrowing into a 1-2 cm long petiole but not articulated to the sheathing base. Raceme terminal, seven-flowered; peduncle c. 21 cm long; rhachis reddish hairy, c. 15 cm long; bracts erect-spreading but later reflexed, lanceolate, acute, 1-2.8 cm long, 0.15-0.3 cm wide, reddish hairy. Flowers showy, yellow with a purple-spotted lip; pedicel and ovary c. 4.5 cm long, densely glandular and brownish pilose. Dorsal sepal ovate-elliptic, cuspidate-acuminate, 3.5-3.9 cm long, 2.2-2.5 cm wide, reddish hairy on outer surface; synsepal ovate-elliptic, bifid at apex, a little wider than the dorsal sepal, ciliate, reddish hairy on outside. Petals spreading, suboblong-ovate, acute or apiculate, 3-3.6 cm long, 0.9-1.1 cm wide, nine-veined, the base of the outside and the veins inside reddish hairy, basal margins ciliate. Lip slipper-shaped, slightly dependent-porrect, obovoid-ellipsoidal, 4-4.6 cm long, c. 3 cm wide, glabrous on outside, pilose within at the base, the side lobes oblong, incurved, the mouth suboblong. Column 1.3 cm long; staminode stalked, ligulate-spathulate, obtuse, stipitate at the base, slightly upcurved at tip, 0.5 cm long, 0.15 cm wide.