Herbs, epiphytic. Roots fleshy, glabrous. Stems aggregate or spaced, erect, forming flattened or fusiform pseudobulbs. Leaves 1–3, apical, sessile, articulate; blade ovate to lanceolate, thinly leathery. Inflorescences apical, paniculate racemes, flowers simultaneous or successive, produced only once, pedunculate or sessile. Flowers resupinate or not; sepals subequal; petals sometimes much narrower; lip appressed to column, adnate to proximal 1/2, with callus; pollinia 4, obovoid, laterally compressed, subequal; caudicles 4 in 2 pairs; column not winged, apically 3-or 5-toothed; rostellum semiorbiculate, entire, covered abaxially with viscous substance. Fruits capsules, ellipsoid to ovoid, prominently 3-winged, 1-locular.
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