Epiphytic herbs with short, ovoid, subconic pseudobulbs bearing at the apex a single broad, plicate, petiolate, subcoriaceous, elliptic-lanceolate, acute leaf 35-50 cm. long and 8-12 cm. wide. Inflorescences short pendulous racemes typical of the genus. Flowers 2-4, large, creamy white (in our specimens). Sepals mem-branaceous, the dorsal sepal free, erect, elliptic-lanceolate, concave, acute, 6.5-7.5 cm. long and 1.8-3.5 cm. wide, laterals somewhat connate at the base, reflexed, rather obliquely elliptic-lanceolate, acute, 6-7.5 cm. long and 2-3.5 cm. wide. Petals membranaceous, reflexed, linear-lanceolate, acuminate, 5-6.5 cm. long and 1.1-1.5 cm. wide. Lip fleshy, elongate, 4.5-6.5 cm. long; the hypochile cymbi-form, deeply concave, with slender, elongate, falcate thickenings on the lateral margins, in profile broadly elliptic-lunate, about twice as long as broad (in fresh material), or slightly undulate and about 4 times as long as broad (in dried material), the margins of the canal to the basal concavity closely appressed; the mesochile short, inserted on the apex of the hypochile, with 2 lateral, slender, falcate, incurved, elongate horns; the epichile articulated with the apex of the mesochile, obovate, abruptly apiculate. Column elongate, arcuate, semiterete below, broadly winged above, 5-6.5 cm. long.
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