Erect, tufted, epiphytic herbs without pseudobulbs. Leaves plicate, subcoriaceous, linear-lanceolate, acute, the bases somewhat conduplicate and imbricating, distichously arranged in the form of a fan. Inflorescences of slender, elongate, erect, 1-flowered scapes produced from the axils of the central leaves. Flowers large and conspicuous. Sepals rather fleshy, subequal, spreading, the dorsal sepal free, the laterals connate at the base and obliquely inserted on the column foot. Petals rather fleshy, spreading, subequal to the sepals, inserted on the foot of the column. Lip fleshy, abruptly contracted at the base, with a conspicuous claw which forms a geniculate angle with the column foot; the basal callus with an erect, semicircular, fimbriate margin, the apical lobe articulated with the base of the callus plate. Column short, somewhat arcuate, the apex dilated, with a dorsal keel, the lateral margins broadly winged and confluent at the apex, forming a conspicuous hood over the clinandrium. Anther terminal, operculate, incumbent, 1-celled or imperfectly 2-celled; pollinia 4, waxy.
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