Ada, abbreviated as Ada in horticultural trade, is a genus of 16 species in the orchid family (Orchidaceae), subfamily Epidendroideae, tribe Cymbidieae, subtribe Oncidiinae, alliance Oncidium. The type species is Ada aurantiaca. These are epiphytic or lithophytic orchids. They are native to Nicaragua down to northern South America, down the Andes to Bolivia. They are warm to cool-growing plants to be found in wet, montane forests at higher elevations, between 650 and 2700 m, but most between 1800 and 2200 m. They are not easy to cultivate, because of their high demands.