Carpenterara (Cpta) Sydney Smith is an Oncidium intergeneric hybrid registered in 1993, but due to changes in classification it is called Oncidesa Sydney Smith now. It should respond well to typical Oncidium conditions, and over a broad temperature range. It should do fine mounted, or in S/H or typical potting media with the right care. It can possibly be saved, but I wouldn't try to mount a plant in that condition right away. It needs to come out of the pot, get cleaned of any bad roots or other dead tissue, and get babied with high humidity, I'd use a bed of live sphagnum moss if possible, until it shows some healthy new growth and roots. Then you could try mounting it or whatever you prefer.