Herbs, epiphytic, monopodial, medium-sized. Stem pendulous, long, sometimes branching, leafy. Leaves oblong to elliptic, unequally bilobed. Inflorescence axillary, pendulous, racemose or paniculate, densely many flowered. Flowers small. Sepals and petals similar, spreading; mid-lobe spreading; lip immovable, rather fleshy, 3-lobed; lateral lobes erect, small, sometimes fleshy; spur apical, inflated, with callosities on scales within. Column short, stout, lacking a foot; rostellum large or small; stipe spatulate, often hooklike, long; viscidium small; pollinia 2, grooved.