An erect epiphyte with a 7–11 cm. long stem covered by persistent leaf-bases.. Roots in lower half of stem, 1.5–2 mm. in diameter.. Leaves coriaceous, conduplicate, linear-ligulate, unequally roundly bilobed at the apex, 15–20 cm. long, 1.7–2.5 cm. wide, articulated to conduplicate leaf-bases.. Inflorescences spreading, axillary, 18–27 cm. long, 4–8-flowered; bracts scarious, ovate-oblong, obtuse, 8–11 mm. long, brown.. Flowers white with a greenish orange spur; pedicel and ovary 6–9 cm. long, ovary slightly pustular.. Sepals recurved, linear, acute or acuminate, 3.4–4 cm. long, 3.5–4.5 mm. wide.. Petals reflexed, linear, acuminate, 3.4–3.8 cm. long, 4 mm. wide.. Lip recurved, narrowly elliptic, acuminate, 3–4.2 cm. long, 7–11 mm. wide, with distal margins erose-denticulate.. Spur filiform, pendent, wide mouthed, 16–19 cm. long.. Column slender, porrect, 2–2.7 cm. long, minutely puberulent in basal half; stipites obovate, rugulose; viscidium ovate-cordate.. Pl. 7. Fig. 139.
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