Erect, epiphytic herbs with approximate, ovoid-elliptic to linear, compressed, fleshy, monophyllous pseudobulbs 2.5-4.5 cm. long and 6-22 mm. wide, the bases enveloped in several papery, imbricating bracts which become fibrous with age. Leaves coriaceous, ligular, acute or rarely acuminate, 15-32 cm. long and 1.2-3.5 cm. wide, contracted below into short or elongate, conduplicate petioles. Inflorescences slender, usually solitary, 1-flowered scapes 3.5-4 cm. long, produced from the bases of the pseudobulbs. Flowers of moderate size. Sepals subequal, free, spreading, creamy white or yellow, elliptic-oblong, obtuse to subacute, 1.4-2 cm. long and .5-.7 cm. wide, the laterals adnate to the foot of the column, forming a short, rounded mentum. Petals subequal to the dorsal sepal, white or yellow, elliptic-lanceolate, obtuse to shortly acute, 12-15 mm. long and 5-7 mm. wide. Lip conspicuously 3-lobed, orange to yellow with reddish brown or purple markings, 10-12 mm. long and 5-6 mm. wide when spread out, the base contracted and articulated with the column foot, the lateral lobes erect in natural position, the acute apices conspicuously projecting, the mid-lobe broadly oblong, about 3/5 the total length of the lip, the truncate apex usually emarginate; the disk with a fleshy, ligular callus equaling or exceeding the lateral lobes in length. Column stout, somewhat arcuate, semi-terete, 10-12 mm. long, the base produced into a short foot.
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