An epiphytic herb, 14.5–37.5 cm. high.. Pseudobulbs loosely clustered, from a short creeping rhizome, articulated in basal half, cylindric, 5.2–9.5 cm. long, 1–3 cm. in diameter, clothed in 3–4 sheaths.. Leaf linear-lanceolate to ovate, acute or obtuse, cuneate below, 7.2–18 cm. long, 6–11 mm. broad, coriaceous, articulated 1–2 mm. above the pseudobulb apex.. Inflorescence shorter than the leaf, a simple or rarely branched raceme, 5.5–14.5 cm. long, pubescent, up to 20-flowered; peduncles stout, 4.5–9 cm. long, with a basal membranous sheath; bracts lanceolate to ovate-triangular, amplexicaul, 4–7 mm. long.. Flowers yellow, yellowish green or greenish white, mottled purple.. Dorsal sepal oblong-triangular, apiculate, 6.5–7.5 mm. long, 3–4 mm. broad; lateral sepals obliquely triangular, apiculate, 7.5–9.6 mm. long, 6.5–8.5 mm. broad; all sepals ± abaxially pubescent; mentum conical, 6.5–8 mm. long.. Petals narrowly elliptic or obovate lanceolate, subacute to obtuse, 3.5–6 mm. long, 1–2 mm. broad.. Lip strongly recurved, ± sessile, fleshy, distinctly 3-lobed, 7.5–10 mm. long, 3.6–5 mm. broad; side lobes porrect, broadly elliptic; mid-lobe rounded-subquadrate, shortly apiculate, 2.5–4 mm. long, 2–4.5 mm. broad, glandular-pubescent below; callus obscure, central.. Column subterete, 1–1.5 mm. long; foot 4.5–8.5 mm. long; pollinia subglobose.
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