Dwarf, epiphytic herbs; pseudobulbs elliptic-oblong, strongly ancipitous, 1-leaved, 2-5 cm. long and 1.5-2.5 cm. wide, approximate and inserted at an acute angle on the short rhizome, the bases enveloped in several densely spotted, imbricating, papery bracts. Leaves elliptic-lanceolate, acute, subcoriaceous, 5-12 cm. long and 2-3.5 cm. wide. Inflorescences usually solitary, slender, arching or semi-pendulous 1-flowered scapes 4-6 cm. long, produced from the bases of the pseudobulbs. Flowers of moderate size. Sepals subequal, free, widely spreading, lanceolate, acuminate, often somewhat twisted, pale yellow or greenish yellow, 3-4 cm. long and 0.35-0.5 cm. wide. Petals subequal to the sepals, lanceolate, acuminate, pale or greenish yellow, about 3.5 cm. long and 0.5-0.6 cm. wide, often with undulant margins. Lip obscurely 3-lobed, obovate when spread out, about 3.5 cm. long and 1.6-1.8 cm. wide, contracted at the base and adnate to the base of the column, white, aging pale yellow, the inner lip yellow with numerous fine orange-red lines, the rounded lateral margins convolute, forming a tube, the midlobe emarginate, with spreading or reflexed lobules, the disk with a short, inconspicuous, central keel not equaling the column in length. Column slender, semiterete, the margins of the apex distinctly 3-parted and minutely denticulate, forming a hood over the anther.
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