Epiphytic herbs. Pseudobulbs cylindric or narrowly fusiform. Leaves 2–4, distichous, spreading, slightly recurved, ovate, lanceolate, narrowly lanceolate or oblong-lanceolate, 4.5–8.0 × 0.5–1.3 cm, apex unequally and shortly bilobed, each lobe acute, base expanded into sheaths, glabrous on both surfaces. Inflorescences with 1–4 subterminal and axillary racemes, 2.5–5.5 cm long, not exceeding leaves, lax, 2–3-flowered. Flowers resupinate, waxy, strongly fragrant, 1.4–1.6 cm in diameter. Sepals greenish yellow with 3 longitudinal purple veins, spreading, often recurved distally, margin entire, abaxial surface distinctly keeled. Petals pale green or greenish yellow, with 3 longitudinal purple veins, spreading, oblanceolate, apex acuminate, base truncate, margin entire, sometime slightly undulate in upper half. Labellum bright greenish yellow or dull green, recurved at apex, ovate or suborbicular and distinctly trilobed. Column green, margin entire. Pollinia 4, in 2 pairs, yellow, each pollinium narrowly elliptic. Ovary narrowly clavate, curved, glabrous, waxy, 6-grooved. Capsule green, ellipsoidal, with 3 obtuse keels, apex with scarious, persistent sepals and petals.
