Coarse epiphytic or lithophytic herbs. Stems simple or branched, stout, leafy. Leaves distichous, conduplicate, coriaceous, sometimes fleshy, apex emarginate, bilobed or praemorse. Inflorescence axillary, racemose, corymbose, or paniculate, shorter than leaves; floral bracts inconspicuous, scale-like, persistent. Flowers with the labellum nearest the inflorescence axis, rigid and fleshy, fragile. Sepals and petals similar, flat to curved; lateral sepals adnate to the spur (when present). Labellum saccate or with a spur, adnate to column, immobile, rigid, variously lobed, fleshy, papillose, tuberculate or warty, sometimes dentate; spur lacking any internal tongue or median septum. Column stout and fleshy, glabrous or papillose; stelidia two, toothlike; foot absent; anther cap ovate, apiculate; pollinia four, globose, unequal, waxy, connected in two pairs, caudicle linear, viscidium ovoid; stigma transverse, concave, rostellum emarginate.