A glabrous epiphytic herb, 12–16 cm. high.. Pseudobulbs distantly placed on an elongated rhizome, conical, 2.6–4.5 cm. long, 4–5 mm. in diameter, ± ridged, shiny, clothed in 3–4 membranous basal sheaths.. Leaf linear, acute to obtuse, cuneate below, 9.5–11.3 cm. long, 6–9.5 mm. broad, coriaceous, articulated 4–5 mm. above the pseudobulb apex.. Inflorescence shorter than the leaf, simply racemose, 4–5 cm. long, up to 5 flowers borne successively; peduncle slender, 2.6–3.5 cm. long, with a membranaceous basal sheath; bracts triangular, amplexicaul, 1.5–2 mm. long.. Flowers white; callus ochre-yellow; anther-cap purple.. Dorsal sepal ovate-lanceolate, acuminate, 7.5–11.5 mm. long, 2.5–3.2 cm. broad; lateral sepals narrowly triangular, oblique, acuminate, 8–14 mm. long, 5–7 mm. broad; mentum broadly conical, to 5–6 mm. high.. Petals spreading, linear-lanceolate, acute, 6.5–8 mm. long, 1–2 mm. broad.. Lip strongly recurved in the middle, sessile, distinctly 3-lobed in the middle, 10–12.5 mm. long, 4–6 mm. broad; side lobes ovate or elliptic, porrect; mid-lobe ovate-lanceolate, acuminate, 5–7 mm. long, 1.4–3 mm. broad; callus central, fleshy.. Column subterete, 1–1.5 mm. long; foot 4–5.5 mm. long; pollinia ovoid.
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