Gastrochilus retrocallus is a species of miniature, epiphytic orchid that originates from the Ren-ai Township, Nantou County, in Taiwan.  Inside this precious, beautiful nature reserve, Gastrochilus retrocallus can be found growing on trees in areas of cloud forests.  This particular area is very rich in flora and fauna; there are many other special plants that originate from this area, including other orchids such as Cymbidiums.