Dwarf, caespitose, epiphytic herbs averaging 12-15 cm. in height, with ovoid to suborbicular, compressed, monophyllous or rarely diphyllous pseudobulbs 1.5-3 cm. long and 1.4-2.5 cm. wide, at first smooth, often becoming finely wrinkled with age, the bases enveloped in several imbricating bracts the uppermost 2 or 3 of which are conspicuously foliaceous. Leaves linear-ligular, obtuse to subacute, pergameneous, 5-15 cm. long and 0.8-1.4 cm. wide, contracted below into short, conduplicate petioles. Inflorescences 1 or 2 slender, erect or arching, densely paniculate scapes usually exceeding the leaves, up to about 30 cm. in length, produced from the lateral bases of the pseudobulbs. Flowers small, averaging 1-1.5 cm. in diameter, bright yellow and fragrant. Sepals of about equal length, the dorsal sepal erect, shortly clawed at the base, the orbicular blade deeply concave, often with a minute apicule, about 5 mm. long and 4 mm. wide, the lateral sepals elliptic-obovate, obtuse, often reflexed, apparently very shortly connate at the base, 5-6 mm. long and 3-3.5 mm. wide. Petals shortly clawed, spreading, obovate-spatulate, obtuse, about 4-5 mm. long and 4 mm. wide. Lip conspicuously 3-lobed, averaging about 8 mm. long and 12 mm. wide, the sessile base adnate to the base of the column, the broadly spreading, auriculate, lateral lobes subquadrate to suborbicular, usually with reflexed margins, the central portion of the lip with an abrupt, narrow constriction, the mid-lobe transversely subreniform or 2-lobed, the lobules often porrect in natural position, the disk with a prominent, fleshy keel, the upper margins with 2 conspicuous subquadrate wings, between which at the apex there is a short membranaceous hood or concavity. Column very short, with large obovate, usually porrect, lateral wings, the base produced in front into a prominent, erect, fleshy horn. Anther with a long beak, otherwise typical of the genus.
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