A pendent epiphyte with ancipitous stems up to 15 cm. long or more.. Leaves distichous, ligulate to oblanceolate, unequally obtusely bilobed at the apex, 9.5–16 cm. long, 2–3 cm. wide, twisted at base and articulated to 1.5–3.2 cm. long sheaths.. Inflorescences 3–6-flowered, up to 18 cm. long; peduncle 4–11 cm. long; bracts amplexicaul, obconical, obtuse, 4–5 mm. long.. Flowers white; pedicel and ovary 1.2–1.4 cm. long.. Sepals linear-lanceolate to elliptic-lanceolate, acuminate, 2.6–2.8 cm. long, 3–6 mm. wide.. Petals linear-lanceolate, acuminate, 2.2–2.7 cm. long, 2.5–5 mm. wide.. Lip concave, elliptic-lanceolate, acute, 1.5–1.7 cm. long, 6 mm. wide, with a longitudinal ridge-like callus in basal half.. Spur sigmoid, slenderly cylindrical, 6.5–7.8 cm. long.. Column 3–4 mm. long.. Pl. 5.
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