An erect epiphytic or rarely terrestrial plant, to 50 cm. long.. Stems clustered, terete, 7–32 cm. long, 1–4 mm. diameter, covered at the base by 2–3 acute sheaths, 4–7(–12)-leaved in apical two-thirds.. Leaves suberect, linear or linear-lanceolate, unequally and acutely bilobed at the apex, to 22 cm. long, 2–11 mm. wide.. Inflorescence terminal, paniculate, 10–20 cm. long; peduncle 5–10 cm. long, subtended by 1–3 imbricating paleaceous sheaths; branches 1–5, spreading, often simple but rarely branched again, to 9 cm. long, 1 cm. wide including the flowers, densely many-flowered; rhachis slender, terete; bracts minute, triangular, acuminate, 1.5 mm. long.. Flowers erect-spreading or suberect, almost globose, white or yellow-green, with a purple margin, glabrous.. Dorsal sepal erect or slightly curved, concave, broadly elliptic-ovate, obtuse, 1.7–2.5 mm. long, 1.5–2 mm. wide; lateral sepals obliquely rotund-triangular, acute or shortly apiculate, 2.2–3.4 mm. long, 2.4–2.6 mm. wide; mentum globose, 2.1–2.4 mm. high.. Petals elliptic or subspathulate-ligulate, obtuse or rounded, 1.4–2.2 mm. long, 0.6–0.8 mm. wide.. Lip shortly clawed, ecallose, 3-lobed above the middle, 2.4–2.8 mm. long, 2.5–3.3 mm. wide; side lobes erect, curved forwards, ligulate-lanceolate; mid-lobe about equal in length to side lobes, rotund-triangular or semi-ovate, obtuse, apex recurved, 0.8–1 mm. long, 1–1.2 mm. wide.. Column short, almost terete, 1 mm. long, purple.. Fig. 74.
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