Robust, erect, epiphytic herbs with approximate, narrowly ovoid to linear-oblong, compressed, longitudinally ridged, usually diphyllous pseudobulbs 8.5-12 cm. long and 3-4 cm. wide, the lower portions enveloped in the conduplicate, distichously imbricating bases of 6-7 bracts, the uppermost 4-5 of which are conspicuously foliaceous. Leaves and bract blades linear-lanceolate, acute, subcoriaceous, 15-45 cm. long and 1.5-3.2 cm. wide, the foliaceous bracts articulated near the base, with a distinct suture, the blades ultimately deciduous. Inflorescences 1 or 2 erect or arching, many-flowered panicles up to about 1 m. in length, produced from the lateral bases of the pseudobulbs. Flowers of moderate size, 2.5-3 cm. long and 1.5-2.2 cm. wide. Sepals free, spreading, clawed at the base, yellow barred with brown, the dorsal sepal elliptic-oblong, acute, with undulate margins, 9-12 mm. long and 4-5 mm. wide, the lateral sepals obliquely oblong, subacute, with undulate margins, 10-13 mm. long and 4-5 mm. wide. Petals rather obliquely oblong, subacute, with undulate margins, yellow barred with brown, 10-12 mm. long and 4-5 mm. wide. Lip panduriform, 3-lobed, bright yellow, the small auriculate, lateral lobes subquadrate to suborbicular, the frontal margins abruptly contracted into a narrow central isthmus, the mid-lobe broadly dilated and 2-lobed, transversely reniform, occupying about 2/3 of the total length of the lip, the disk brown, with an erect, compact, 7-toothed basal callus. Column short, about 4 mm. long, with prominent lateral wings.
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