A terrestrial herb 30–70(–105) cm. tall.. Perennating organs underground, tuberous, irregularly conical-ovoid, in a chain, 2–3 cm. tall, 2 cm. diameter; roots fine, 1 mm. diameter, white.. Leaves 2–3, erect, linear, acuminate, plicate, 30–60 cm. long, 2.5–3 cm. wide.. Inflorescence densely many-flowered; peduncle 15–25 cm. long, 5–8 mm. diameter, almost covered by 3–6 acuminate papery sheaths; rhachis 4–12 cm. long; bracts linear-aristate, acuminate, 16–33 mm. long.. Flowers subnutant, pinkish mauve or white with a purple lip; pedicel and ovary 20–25 mm. long.. Dorsal sepal ovate, acute or acuminate, 15–18 mm. long, 7–8.5 mm. wide; lateral sepals obliquely ovate-elliptic, acute or obtuse, 17.5–18 mm. long, 8–10 mm. wide.. Petals elliptic, obtuse or apiculate, 13 mm. long, 6 mm. wide.. Lip 3-lobed, 13–14.5 mm. long, 10–11 mm. wide; side lobes porrect, rounded in front; mid-lobe subquadrate; callus of 2 ridges with 5 rows of papillae in front.. Spur 3–3.5 mm. long.. Column 6 mm. long; foot 2 mm. long.. Fruit not known.
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