Erect epiphytic herbs with stout ovate to rectangular-elliptic, somewhat com-pressed pseudobulbs 4-6 cm. tall and 1.5-3.5 cm. wide, the bases enveloped in several imbricating papery bracts which become fibrous with age, the truncate apex of the pseudobulb with a single leaf. Leaves coriaceous, persistent, the blades oblong, acute, contracted below into an elongate, conduplicate petiole, 16-50 cm. long and 2-5 cm. wide. Inflorescences usually several, erect, 1-flowered scapes 12-15 cm. tall, enveloped in several approximate, tubular, acuminate, papery bracts. Flowers large and conspicuous. Sepals subequal, free, widely spreading, yellow, linear-lanceolate, long-acuminate, 4.5-5.5 cm. long and .5-.6 cm. wide, the laterals adnate at the base to the foot of the column, forming a short mentum. Petals subequal to the sepals, white, linear-lanceolate, acuminate, the apices in-curving, 4-4.5 cm. long and .35-.5 cm. wide. Lip 3-lobed, 12-15 mm. long, contracted at the base and articulated with the foot of the column, the lateral lobes elongate, erect, the anterior margins rounded, the mid-lobe about I/4 the total length of the lip, suborbicular to subquadrate, obtuse; the disk with a fleshy ligular callus. Column semi-terete, somewhat arcuate, 8-10 mm. long, produced at the base into a foot.
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