Plant tall, base not seen. Upper leaves ovate-oblong, subacute, somewhat sheathing below, 2–3 in. long. Racemes lax, 3–8-flowered. Bracts ovate-oblong, acute, 3/4–1 1/2 in. long. Pedicels 2–2 1/2 in. long. Dorsal sepal elliptic-oblong, acute, 8 lin. long; lateral oblique, falcate-obovate from a cuneate base, apiculate, 10–11 lin. long. Petals bipartite; posterior lobe filiform, as long as the dorsal sepal and adhering to its margin; anterior lobe falcate-linear, regularly attenuate upwards and acuminate, 1 1/4 in. long. Lip tripartite; side lobes ovate-lanceolate, acute, 4 lin. long; front lobe linear-filiform, acute, 1–1 1/4 in. long; spur 3 in. long, slender below, clavate at the apex. Stigmatic processes 6–7 lin. long, slender, capitate. Anther channels slender, nearly as long as the stigmas. Rostellum triangular-subulate, acute, 2 1/4 lin. long.
