Overview
Small monopodial epiphytes, rarely lithophytes. Stems short. Leaves alternate, distichous, unequally bilobed at the apex, sometimes twisted at the base and thus lying in one plane. Inflorescences axillary, pedunculate, few to many-flowered racemes, the peduncle wiry. Flowers small, white to yellowish-green. Sepals and petals mostly free, spreading, the base of the petals often fused to the lateral sepals. Lip usually three-lobed, rarely unlobed, callus absent, spurred, the spur sometimes inflated at the apex. Column short, the rostellum short, rarely elongate, three-lobed; pollinia 2, globose, on separate stipes, the viscidia usually separate.