Herbs, epiphytic, lithophytic, or terrestrial, monopodial. Stems decumbent or pendulous, elongate, stout, rigid, sometimes branched, many leaved. Leaves distichous, flat, leathery, jointed. Inflorescences axillary, suberect or pendulous, racemose, long or short, rarely shortly branched, many flowered. Flowers resupinate, flat, medium-sized to large, fleshy. Sepals and petals similar, spreading; lip smaller than petals, firmly adnate to column, geniculately bent, ± channeled or gibbous at base, 3-lobed; lateral lobes often small; mid-lobe laterally flattened, rather long, fleshy, adaxially usually longitudinally ridged or keeled. Column short, stout, foot absent; rostellum inconspicuous; pollinia waxy, 2, in unequal pairs, deeply grooved, sessile; stipe broadly oblong; viscidium transverse, prominent.
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