Plant medium in size, epiphytic, caespitose; roots slender, flexuous. Secondary stems slender, terete, 4-11 cm long, with a close-fitting tubular sheath below the middle and 1-2 others at the base, unifoliate. Leaf coriaceous, thin, narrowly ovate, acute to acuminate, tridenticulate, the base cuneate into a channeled petiole, 6-11 X 2-3.5 cm, including the 1 cm petiole. Inflorescence racemose, solitary (occasionally 2), arcuate, loosely fewto many-flowered (5-16), 10-20 cm long, the flowers pale yellow-green, spotted with red-purple; peduncle slender, weak, from a foliaceous spathe, 4-5.5 cm long, 6 mm broad, from the base of the leaf-petiole; floral bract infundibular, acute, 2-3 mm long; pedicle 2-3 mm long; ovary spotted with purple, 4 mm long; dorsal sepal narrowly ovate, acute to acuminate, 10-11 X 2. 5-3 mm, 3-veined, yellow-green, spotted with purple; lateral sepals united into an ovate lamina, subacute, 10-11 X 4.5-5 mm, 4-veined, similar to the dorsal sepal; petals very narrowly triangular, attenuate, acuminate, acute, 9-11 X 1 mm, 3-veined at the base, maroon or spotted with purple; lip thickened, narrowly ovate, acute, convex, dilated slightly below the middle, the sides not incurved, the base broadly and firmly adherent to the column-foot; column stout, 1.5 mm long, with a broad, short foot.