Erect, tufted, epiphytic herbs without pseudobulbs. Leaves plicate, contracted below into conduplicate imbricating petioles, which are distichously arranged in the form of an open fan. Inflorescences of short, slender, arching, 1-flowered scapes produced from the axils of the non-foliaceous basal bracts. Flowers relatively large and conspicuous. Sepals more or less fleshy, subequal, concave, the dorsal sepal erect, free, the laterals connate at the base and obliquely inserted on the column foot. Petals subequal to the sepals. Lip rather fleshy, 3-lobed, abruptly contracted at the base into a conspicuous ligular claw which is continuous with the foot of the column, the limb forming an obtuse angle with the column foot, the base apparently with a deep concavity below the column, surrounded by an erect semicircular plurisulcate callus; apical lobe of the lip more or less convex or ventricose, the lateral margins often recurved. Column stout, semi-terete, produced at the base into a short foot. Anther terminal, operculate, incumbent, 1-celled; pollinia 4, waxy.
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