An epiphytic or rarely lithophytic herb, 11.5–28.5 cm. high.. Pseudobulbs spaced on an ascending rhizome, narrowly conical, 3–8 cm. long, 2–6 mm. in diameter, clothed in 3–4 loose basal sheaths.. Leaf lanceolate to ovate-lanceolate, acute, cuneate below, 7.5–15.5 cm. long, 1.1–2.3 cm. broad, coriaceous, articulated 2–6 mm. above the pseudobulb apex.. Inflorescence shorter or longer than the leaf, a simple raceme, 3.5–15 cm. long, up to 11 flowers borne in succession; peduncle slender, 2.4–12.7 cm. long, with a membranous basal sheath; bracts triangular to obovate, amplexicaul, ± acuminate, 3–7 mm. long.. Flower lemon-yellow, sometimes with red streaks or darker spotting at the base of the lip.. Dorsal sepal ovate to ovate-triangular, 6–10 mm. long, 3–5 mm. broad; lateral sepals spreading, obliquely ovate-triangular, 6–11 mm. long, 5–11 mm. broad; mentum ovoid-conical, to 10 mm. long.. Petals narrowly obovate, obtuse, 6–10 mm. long, 1.3–3.3 mm. broad.. Lip strongly recurved in the middle, ± distinctly 3-lobed in the apical third, 6.5–11 mm. long, 4–8 mm. broad; side lobes erect, broadly elliptic; mid-lobe rounded-subquadrate, apiculate, to 5 mm. long, 5.5 mm. broad; callus obscure, fleshy, ± central.. Column subterete, 1.5–2.5 mm. long; foot 5.5–9.5 mm. long; pollinia ovoid.
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