Epiphytic or terrestrial herbs, with stout ovoid or subconic pseudobulbs, the apex with 1-5 broad, elliptic-lanceolate, plicate leaves which are often deciduous. Inflorescences tall erect or short pendent racemes from the base of the pseudobulbs. Flowers fleshy, subglobose, relatively large and conspicuous. Sepals fleshy, sub-equal, broadly concave, the dorsal sepal usually free, the laterals somewhat con-nate at the base. Petals subequal to the sepals, but smaller. Lip very fleshy, with a broadly concave basal claw or hypochile which is adnate to or continuous with the base of the column, with or without a fleshy central callus, with or without elongate, erect, lateral wings; apical portion or epichile entire, articulated with the hypochile, inflexed or incumbent, lateral margins erect, spreading or retuse; disk with or without a fleshy ventricose or 2-keeled callus. Column erect, short, stout, subterete, without a foot, with or without elongate lateral projections. Anther terminal, operculate, incumbent, imperfectly 2-celled; pollinia 2, waxy.
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