Erect epiphytic herbs. Pseudobulbs short, stout, ovoid, subconic, somewhat wrinkled, often nearly black, 2.5-3.5 cm. long and 2-2.5 cm. wide, enveloped in 3-4 fibrous, brown, papery bracts, the apex with a single elliptic-lanceolate, long-petiolate, plicate, acute or acuminate leaf 40-60 cm. long and 7-10 cm. wide. Inflorescences very short, pendent, produced from the base of the pseudobulbs, the rachis enveloped in several closely imbricating papery bracts, the apical 2-3 of which are expanded and spathaceous, 3-3.5 cm. long and 1.5-2.0 cm. broad, arching over the flowers. Flowers the smallest known for the genus, usually 2, which face each other on the scape. Sepals membranaceous, pale yellow, concave, the dorsal sepal free, erect, elliptic-lanceolate, acute, 20-30 mm. long and 10-20 mm. wide when spread out; laterals connate at the base, reflexed, ovate to broadly subfalcate, acute, 2.5-3.5 cm. long and 1.5-2.5 cm. broad. Petals menibranaceous, reflexed, yellow, ligular, abruptly acute, 2-3 cm. long and .8-1.2 cm. wide. Lip very fleshy, waxy, simple, undivided, tan marked and margined with red-brown, the body composed of the hypochile, which is broadly inflated at the base and adnate to the base of the column, 18-25 mm. long and 18-20 mm. broad, lateral margins more or less erect, the ventral surface of the apex of the hypochile broadly concave; the inner disk with an elongate, more or less prominent, central, reddish-brown keel, terminating at the apex in a short, subcordate acute, fleshy boss con-fluent with the apex of the hypochile. Column somewhat arcuate, 1.8-2 cm. long, semiterete, without broad lateral wings.
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