Stems closely spaced from short rhizome, 40-60 cm long, rigid, apically slender, leafless, middle part leafy, base swollen, forming a pseudobulb. Pseudobulb yellowish green, fusiform, 5-8 cm long, 1.5-2 cm in diam., internodes 3 or 4, furrowed in age. Leaves distichous, ovate-oblong, stiff, 6 cm long, 2.5 cm wide, apex more or less obliquely 2-lobed, base contracted, articulated with sheath. Racemes 1- or rarely few flowered, from internodes of leafless stem; bracts cylindrical, 6 mm long. Flowers white or sometimes tinged with pink, fragrant, lasting only 1 or 2 days; dorsal sepal ovate-lanceolate, 17-22 mm long, 5-6 mm wide, apex obtuse, sometimes incurved; lateral sepals lanceolate-triangular, 22-35 mm long, 7-8 mm wide, apex sometimes incurved, base oblique, adnate to foot of column forming conic and curved mentum ca. 1.5 cm long; petals ovate-oblong, 12-18 mm long, 6-7 mm wide, apex obtuse, contracted at base; lip obovate-oblong, 20-24 mm long, 13-18 mm wide, 3-lobed, lateral lobes erect, semi-oblong, nearly entire, terminal lobe ovate, 1 cm long, crenulate-denticulate, disc with yellowish crenulate keel; column 2 mm long, 3 mm wide, foot 1.4 cm long, with yellow fan shaped gland at base; anther cup-like, whitish; pollinia ovate-oblong, 1.5 mm long. Capsule ellipsoid, 2.5 cm long.

TAITUNG: Lutao (Green island), Sasaki s. n. May 1927; Su 163.

Sri Lanka, Myanmar, Indochina, throughout the Malesian region and the Philippines. Taiwan, Lutao Is., originally somewhat abundant in primary forests, now rare due to forest destruction.