An epiphytic or rarely terrestrial herb, 12–31 cm. high.. Pseudobulbs loosely clustered, from a creeping rhizome, cylindric, 4.5–10 cm. long, 1.5–5 mm. in diameter articulated in basal half, clothed in 3–4 membranaceous sheaths.. Leaf ovate to lanceolate, obtuse, cuneate at base, 11.5–21 cm. long, 1.6–2.4 cm. broad, coriaceous, articulated 1–2 mm. above the pseudobulb apex.. Inflorescence mostly shorter than the leaf, pubescent, a simple or rarely once branched raceme, 3–18 cm. long, up to 8 flowers borne successively; peduncle stout, 1.2–7.8 cm. long, with a membranous basal sheath; bracts ovate-triangular, acuminate, amplexicaul, 3–7 mm. long.. Flowers off-white, greenish yellow or yellow, mottled or streaked purple.. Dorsal sepal triangular-ovate, apiculate, 5–10 mm. long, 2.2–4 mm. broad; lateral sepals spreading, obliquely triangular, apiculate, 6.5–10 mm. long and broad; all sepals pubescent on outer surfaces; mentum conical, 6–9 mm. long.. Petals obliquely obovate-lanceolate, obtuse, 4–7 mm. long, 1.2–2 mm. broad.. Lip strongly recurved in the middle, ± clawed, distinctly 3-lobed, 6.5–10 mm. long, 3.5–5.5 mm. broad; side lobes ± porrect, triangular-ovate; mid-lobe ovate-quadrate to oblong, fleshy, truncate or rounded and apiculate at the apex, 2.4–4.5 mm. long, 2.5–4.3 mm. broad, glandular-pubescent in the centre; callus ± central.. Column subterete, 1–2 mm. long; foot 5–8 mm. long; pollinia subquadrate-globose.
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