Epiphytic (rarely pseudo-terrestrial) herbs. Pseudobulbs fleshy, usually elliptic-ovoid, rarely suborbicular, laterally compressed, 4.5-6.5 cm. long and 2-3.5 cm. wide, enveloped at the base in several coarsely fibrous bracts, the apex with 2-4 elliptic-lanceolate, plicate, acute or shortly acuminate leaves which are ultimately deciduous, 15-20 cm. long and 3-5 cm. wide, the apex of the old pseudobulbs armed with 2 conspicuous sharp spines; roots usually conspicuously lanuginose. Inflorescences 1 to many slender, erect scapes 5-7 cm. tall, usually produced concurrently with the flush of new growth from the base of the old leafless pseudobulb, the filiform rachis provided with several distant tubular sheathing bracts, the apical bract usually about half the length of the ovary. Flowers more or less pseudo-campanulate, solitary, somewhat nodding. Sepals subequal, membranaceous, usually pale green to olive-green, rarely rose, the dorsal sepal free, erect, elliptic-lanceolate, acute, the apex strongly recurved, 2.5-2.8 cm. long and 10-15 mm. wide, laterals adnate to the foot of the column, forming a short mentum, from the oblique base elliptic-lanceolate, acute, the apices strongly recurved, 2.5-3 cm. long and 1.0-1.5 cm. wide. Petals subequal to the sepals, white marked rose, or rarely pure white, elliptic-oblanceolate, acute, the apices recurved, 2.4-2.6 cm. long and 1.0-1.5 cm. wide. Lip 3-lobed, articulated at the base with the foot of the column, white with rose markings, or rarely white, nearly as broad as long when spread out, 2.2-2.5 cm. long and 1.8-2.2 cm. wide, lateral lobes erect, rather obscurely emarginate at the subacute apices, mid-lobe broadly obtuse, the apex somewhat reflexed; disk with an elongate, acute, 2-costate linguiform callus. Column semiterete, rather arcuate, 8-9 mm. long, the under-surface conspicuously pubescent, the base produced into a foot.
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