Epiphytic herbs unusually large for the genus, up to about 25 cm. tall, with short, oblong-complanate, striate-rugose, monophyllous pseudobulbs up to about 1.5 cm. long and 0.8 cm. wide, completely concealed by the large ovate-lanceolate, papery bracts which become fibrous with age. Leaves oblong-lanceolate to elliptic-lanceolate, subacute, coriaceous, up to about 20 cm. long and 4-5 cm. wide, contracted below into short, conduplicate petioles. Infloresences 1 or 2 arching or pendulous, densely flowered racemes 13-21 cm. long, produced from the base of the current pseudobulb. Flowers relatively large for the genus, on slender pedicels subtended by narrowly triangular, acuminate bracts. Sepals concave, orange, the dorsal sepal free, fornicate, oblong-lanceolate, acute when flattened out, about 9-10 mm. long and 2.3-3 mm. wide, the lateral sepals connate to nearly the apex, forming a single bifid segment below the lip, about 8-9 mm. long and 4 mm. wide when spread out, the apices strongly reflexed. Petals falcately linear-ligular, acute, entirely white, antrorsely incurving in natural position, the apices deflexed, 7.6-8.4 mm. long and about 1.6 mm. wide. Lip shortly clawed at the base and obliquely inserted on the base of the column, the blade broadly trulliform, 6.3-7.1 mm. long (including the claw) and 4-5 mm. wide, the abruptly acuminate apex strongly recurved in natural position, the disk with a low carinate callus. Column slender, terete, glabrous, about 4.9 mm. long, typical of the genus.
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