Herbs, epiphytic, small, monopodial. Stems mostly short. Leaves few to ca. 10, ± distichous, flat, lorate, jointed and amplexicaul-sheathing at base, apex usually unequally bilobed. Inflorescences solitary to several, lateral or axillary, penetrating leaf sheaths, erect or pendulous, racemose, with a few to many spirally or distichously alternating flowers. Flowers usually resupinate, small. Sepals and petals free, spreading; lateral sepals often oblique and distinctly broader than petals, not adnate to column foot. Petals narrower than sepals; lip hinged to end of column foot by a movable joint, 3-lobed; lateral lobes erect, rather long; mid-lobe very short and small, fleshy, base spurred; spur or sac pointing forward in line with column foot, without interior ornaments, although front wall sometimes quite fleshy. Column short and stout, with a long foot; rostellum small, 2-lobed; pollinia 2, waxy, subglobose, cleft, attached by a common suboblong stipe to a ± triangular viscidium.
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