Stem woody, up to 10 mm. in diameter, 10–100 cm. long, usually upright, at least in the terminal leafy part, covered with old leaf-bases in the lower part from which whitish roots up to 9 mm. in diameter arise.. Leaves 8–20, alternate, distichous, 1–3 cm. apart, ligulate, 8–28 cm. long, 1.5–4.5 cm. wide, apex unequally lobed, the lobes rounded or obtuse, the longer 5–10 mm. long, the shorter up to 5 mm. long or absent, fleshy or leathery in texture, deep green, margins entire.. Inflorescences borne at the nodes, arching racemes bearing 4–10 flowers; peduncle terete, up to 9 cm. long, 6 mm. in diameter, bearing 2–3 tubular sheaths; rhachis ± straight, green, to 20 cm. long, with a short projection 2–3 mm. long in the axil of each bract; bracts very broadly triangular-ovate, obtuse or apiculate, cucullate, 10–15 mm. long.. Flowers held erect in 2 rows, 1.5–3.5 cm. apart, white; pedicel with ovary green, 3–6 cm. long.. Dorsal sepal erect, sometimes curving forward at the tip, lanceolate-elliptic, cuspidate, 22–30 mm. long, 7–9 mm. wide; lateral sepals strongly reflexed, lanceolate-elliptic, acuminate, winged on the back in the upper half, 25–32 mm. long, 5–6 mm. wide.. Petals reflexed, oblique, lanceolate-elliptic, acute, 20–25 mm. long, 6–8 mm. wide.. Lip reflexed, elliptic-lanceolate, acuminate, margins recurved below, inrolled above, 20–25 mm. long, 7–8 mm. wide.. Spur pendulous, flexuous, cylindrical but widened and flattened in its terminal half, 10–15 cm. long.. Column erect, widened towards the apex, 6–8 mm. long; anther-cap conical, rounded; pollinia oblong; stipes very slender, 3 mm. long; viscidium round.. Fig. 133.
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