Epiphytic, or often pseudo-terrestrial herbs with elliptic-ovoid, laterally compressed, smooth, or somewhat ridged pseudobulbs 3-6 cm. long and 2-3 cm. wide, the bases enveloped in 3-4 papery, closely imbricating bracts the upper 2 of which are usually foliaceous; the apices of the pseudobulbs with 2-3 plicate, lanceolate or elliptic-lanceolate, acute or acuminate, ultimately deciduous leaves 20-35 cm. long and 4-7 cm. broad; the apices of the old pseudobulbs unarmed. Inflorescences 1 to about 4, slender, erect, 1-flowered scapes 5-14 cm. tall, produced from the bases of the mature pseudobulbs before the leaves have fallen, the rachis provided with several distant, papery, tubular, acuminate bracts the uppermost of which is spathaceous and conspicuously exceeds the ovary. Flowers relatively large, very fragrant. Sepals widely spreading, pale translucent green, heavily blotched with chestnut-brown, or wine-red with yellow margins, dorsal sepal free, linear-lanceolate, acute, 3-4 cm. long and .8-1.4 cm. wide, the apex lightly recurved, laterals adnate to the foot of the column, forming a short mentum, from the oblique base, linear-lanceolate, acute, 3-4.2 cm. long and .6-1.4 cm. wide. Petals subequal to the sepals, cream-yellow to nearly white, spotted rose-pink or wine-red, elliptic-lanceolate, obtuse or subacute, 2.5-3.5 cm. long and 1.2-1.8 cm. wide, more or less parallel with the column, the apices strongly reflexed. Lip elliptic-obovate, obtuse or subacute when spread out, 2.6-2.8 cm. long and 1.4-1.7 cm. wide, obscurely 3-lobed, the lateral lobes or margins erect, the mid-lobe short, spreading, obtuse or subacute, separated from the laterals by plicate folds; disk with a short, fleshy, ligular, obtuse, concave callus. Column semiterete, 1.8-2 cm. long, slight-ly arcuate, minutely papillose.
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