An epiphytic herb, 20–30.5 cm. high.. Pseudobulbs tightly clustered, from a short creeping rhizome, narrowly cylindric, 8–18.5 cm. long, 1.5–4.5 cm. broad, clothed in 2–3 membranous sheaths.. Leaf linear, acute, cuneate at base, 12–22 cm. long, 7–14 mm. broad, coriaceous, articulated ± 1 mm. above the pseudobulb apex.. Inflorescence mostly longer than the leaf, a 1–6-branched raceme, 7.9–19 cm. long, up to 20 flowers opening successively; peduncle slender, 5.6–11.7 cm. long, with a membranous basal sheath; bracts triangular-ovate, apiculate, amplexicaul, 2–3 mm. long.. Flowers dull white, yellow, pale green or yellowish green, often spotted or marked purple.. Dorsal sepal triangular-ovate, 6–8.5 mm. long, 2–3.5 mm. broad; Lateral sepals spreading, oblique, rounded-triangular, 6–8.5 mm. long, 3.7–5.2 mm. broad; mentum conical, up to 5 mm. long.. Petals narrowly elliptic or spathulate, obtuse, 4.5–8 mm. long, 1.5–2.5 mm. broad.. Lip strongly recurved, more or less sessile, oblong, entire or obscurely 3-lobed, rounded, truncate or apiculate at the apex, ± glandular-pubescent towards base, 5–6.5 mm. long, 3–5 mm. broad; side lobes erect, elliptic; mid-lobe rounded-subquadrate, shortly apiculate, 2.3 mm. long, 3 mm. broad; callus absent or obscurely fleshy.. Column 1.5–2.7 mm. long; foot 4–6 mm. long; pollinia ovoid.
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