Robust, erect or pendulous, epiphytic herbs 45-60 cm. tall, the elongate cylindric canes provided with distichous, spreading foliage at the apex, the basal portions enveloped in the broad, complanate, persistent, imbricating leaf bases; the plants seemingly without pseudobulbs but sometimes with 1 or more elliptic-oblong, strongly ancipitous, monophyllous pseudobulbs up to 8 cm. tall and 4.5 cm. wide at the base of the leafy cane. Leaves coriaceous, ligular to elliptic-lanceolate, broadly obtuse, 15-25 cm. long and 3.5-4.5 cm. wide, contracted at the base into narrow conduplicate petioles, the broader rugose bases persistent and equidistantly distributed on the stems. Inflorescences short 1-flowered scapes 4-5 cm. long, produced from the axils of the leaves. Flowers relatively large and conspicuous. Sepals subequal, free, spreading, lanceolate, acuminate, white, 2.5-4 cm. long and 6-8 mm. wide, the laterals adnate to the column foot, forming an inconspicuous, rounded mentum. Petals lanceolate, acuminate, white, 2.2-3 cm. long and .4-.5 cm. wide. Lip rather obscurely 3-lobed, ovate, obtuse to subacute when spread out, 1.5 cm. long and 1 cm. wide, contracted at the base into a short claw which is articulated with the foot of the column, the lateral lobes white, erect in natural position, the mid-lobe ovate, obtuse to subacute, yellow, about 1/3 the total length of the lip, separated from the lateral lobes by plicate folds; the disk with a concave, ligular, obtuse callus which is about 34 the length of the lateral lobes. Column semi-terete, somewhat arcuate, 6-8 mm. long, produced at the base into a short foot.
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