Epiphytic herbs. Pseudobulbs stout, ovoid or subconic, tapering, smooth or somewhat ridged, 4-9 cm. long and 1.5-4 cm. wide, the base enveloped in 2-3 brown, fibrous, imbricating bracts, the apex with 2-3, plicate, lanceolate, strongly veined, acute or acuminate, subcoriaceous leaves 24-40 cm. long and 2.5-7 cm. wide, the blades usually deciduous after the second year, the apex of the old pseudobulbs unarmed. Inflorescences erect racemes 12-30 cm. tall, from the base of the pseudobulbs, the lower rachis below the flowers enveloped in several broad, papery bracts. Flowers usually many, fragrant, on short pedicels. Sepals membranaceous, subequal, spreading, creamy white, the dorsal sepal free, lanceolate-acuminate, 10-14 mm. long and 3-4 mm. wide, laterals adnate to the foot of the column, forming a mentum, subfalcately lanceolate-acuminate, 12-14 mm. long and 3-4 mm. wide, the dorsal surface with a prominent central keel. Petals subequal to the dorsal sepal, membranaceous, creamy white, lanceolate-acuminate, 8-10 mm. long and 2-3 mm. wide. Lip creamy white with reddish veining on the disk, conspicuously 3-lobed, 10-12 mm. long, articulated at the base with the foot of the column, the lateral lobes rounded, erect, about equaling or somewhat exceeding the column, apical lobe obtuse, spreading; disk with 5 thickened nerves or keels. Column very short, semiterete, the apex obtuse; the base produced into a long broad foot. Anther 1-celled; pollinia 4.
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