Erect, epiphytic herbs 20-25 cm. tall, with approximate, elliptic-oblong to suborbicular, compressed, monophyllous pseudobulbs 2.5-4.5 cm. long and 2-3.5 cm. wide, the bases enveloped in several thin, papery, imbricating bracts which soon weather away. Leaves elliptic-lanceolate, acute, subcoriaceous, 15-20 cm. long and 4-6 cm. wide, contracted at the base into a short, conduplicate petiole. Inflorescences arching or pendulous, 1-to 4-flowered scapes 5-7 cm. long, pro-duced from the bases of the pseudobulbs. Flowers of moderate size, white with a pale yellow blotch at the base of the lip. Sepals free, spreading, the dorsal sepal oblanceolate, acute, 2.5-3.5 cm. long and 0.7-0.8 cm. wide, the laterals lanceolate, acute, 2.5-3 cm. long and 0.6-0.8 cm. wide. Petals subequal to the dorsal sepal, elliptic-oblong, obtuse with a minute apicule, 2.5-3.2 cm. long and 0.9-1.0 cm. wide. Lip 3-lobed, broadly obovate when spread out, 3-3.5 cm. long and 3-3.5 cm. wide, the narrow base adnate to the base of the column, the lateral lobes rounded, incurving over the column, the anterior margins more or less undulant, the mid-lobe spreading or reflexed, deeply emarginate, the lateral lobules strongly undulate, the disk with a prominent central keel about equaling the column in length. Column slender, terete, 15-18 mm. long, the margins of the apex pro-jecting and forming a fimbriate hood over the anther, the base of the column without a foot.
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