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Epiphytic, rarely lithophytic, herb.Pseudobulbs clustered, 0.6–10 × 0.3–1.5 cm, conical, purple or yellow, 3–4-leaved.Leaves 4–12.5 × 1–2.2 cm, elliptic or lanceolate, dark green, often edged with purple.Inflorescence (floral axis) 5–18 cm tall, simple or with a few short, pubescent branches, fairly densely several- to many-flowered.Peduncle covered with flattened sheaths.Flowers glabrous, fleshy, variously described as lemon-yellow, dull red and yellow, green and yellow, and bright purple, often not opening properly but apparently self-fertile.Pedicel and ovary 3–4 mm long; bracts 2–3 mm long, ovate, acuminate.Dorsal sepal 2.5–3.2 × 1.5–2.3 mm, ovate, acute; lateral sepals 3.5–5 × 2.5–3 mm, obliquely triangular, acute; mentum conical, rounded, 2.5–3 mm high.Petals 2–3 × 0.6–1 mm, oblanceolate.Lip 3.25–4.75 × 2.3–3.5 mm, clawed, 3-lobed at about the middle.Mid-lobe 1–2 × 1.6–2.3 mm, ± orbicular, recurved, bullate, emarginate; side lobes erect, c. 1 mm long, acute; disk with a cushion of whitish hairs. Column c. 1.5 mm long.