Epiphytic herbs. Stem robust. Leaves many, distichous, often lorate, channelled, unequally bilobed or toothed, usually with pale green stripes, articulate to a sheathing base. Inflorescence lateral, racemose, erect or pendent, many-flowered. Flowers resupinate, with a ‘soapy’ fragrance. Sepals and petals free, similar, spreading, lateral sepals often wider and oblique. Petals smaller than sepals. Labellum rigidly adnate to column foot, entire or slightly trilobed, midlobe dorsiventrally flattened, spurred at base; spur laterally compressed and backward-pointing, without internal callosities. Column with a column foot; anther cap beaked; pollinia two, waxy, globular, cleft, solid, stipe linear, apex slightly dilated, viscidium ovate; rostellum beaked.