Epiphytes. Stems tufted, erect or pendulous, elongate or short and obscure, nearly enclosed by leaf sheaths. Leaves equitant, distichous, laterally compressed, ensiform, with broadly flattened sheath at base, articulated with sheath or not. Inflorescence terminal, short or long, a cylindrical spike or raceme; bracts entire or erose. Flowers numerous, nearly verticillate, usually not resupinate; sepals subequal, often broad, reflexed; petals usually narrower than sepals or nearly as broad; lip sessile, concave, 2-4-lobed or undivided, sometimes with small basal auricles embracing column; column with broad wings apically, without foot at base; anther terminal or subdorsal, incumbent or suberect, two-celled; pollinia 4, in 2 pairs, ovoid, waxy, without caudicles or viscidium; stigma entire. Capsules obovoid or ellipsoid.
About 300 species, Africa through tropical Asia to Australia and Papua New Guinea. Five species in Taiwan.
Seidenfaden, G. 1968. The genus Oberonia in mainland Asia. Dansk. Bot. Ark. 25(3): 1-125.