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Plants to 300 mm tall; pseudobulbs adjacent, cylindrical to conical, with several caducous membranous sheaths, 40-100 x 4-6 mm; leaf solitary, lorate to narrowly oblanceolate, auriculate, acute to obtuse, margins sometimes wavy, 120-200 x 15-25 mm. Inflorescences shorter or longer than the leaf, paniculate or rarely simple, 30-80 mm long; bracts amplexicaul, acute, 3 mm long. Flowers variable in size, colour from white to yellow, green, pink or purple. Sepals unequal, acute; median narrowly ovate, 5-6 x 2-3 mm; laterals obliquely ovate, 6-7 x 4 mm. Petals spathulate, acute, 4-5 x 1-1.5 mm. Lip 3-lobed, 5 mm long, disc with a knob-like callus; midlobe acute, 2-2.5 x 1.5 mm, reflexed; side lobes rounded, porrect, 1-1.5 mm tall; mentum 3 mm long. Gynostemium stout, 1.5 mm tall. Capsules cylindrical, slightly curved, 20 x 7 mm.
Dorsal sepal 4–8 × 2–4.5 mm, ovate, acute; lateral sepals 5–8 × 3–6 mm, obliquely triangular, apiculate, slightly keeled on the outside, forming with the column foot a conical mentum up to 7 mm high.
Epiphyte. Pseudobulbs or stems bearing 1 leaf. Leaf elliptic, 140-200 x 20-30 mm. Lip 3-lobed with a cushion-like outgrowth in centre of midlobe. Flowers yellowish green, white or pink.
Leaf 3–21(36) × 1.2–5.5 cm, ovate, obovate or elliptic, acute or apiculate, often undulate on the margin, auriculate at base, articulated 2–6 mm above the apex of the pseudobulb.
Lip 4–7.8 × 3–6 mm, recurved, 3-lobed in the apical half, with a yellowish, fleshy central callus; mid-lobe c. 3 × 2 mm, subquadrate, apiculate; side lobes porrect, rounded.
Flowers white or yellow-green (outside the Flora Zambesiaca area they may be pink or purple).Pedicel and ovary 6 mm long; bracts 2.5–5 mm long, ovate-triangular, acuminate.
Inflorescence (floral axis) usually longer than the leaf, erect or arching, 5–30 cm long, usually branched, densely many-flowered.
Pseudobulbs 1.5–18 cm tall, 0.3–1.2 cm wide at base, conical or cylindrical, covered with membranous sheaths when young, 1-leafed.
Glabrous epiphytic rarely lithophytic herb, forming clumps.
Petals 3.5–7.5 × 1–2.5 mm, linear to oblanceolate.
Column 0.5–3.5 mm long.
