subject: The Two Main Types Of Orchids [print this page] 2. Terrestrial - The terrestrial types of orchids are the most popular orchid species. Like most other plants, the terrestrial orchid grows below the ground. Although, there are also other forms of orchids that can be considered "semi-terrestrial" in nature because they contain roots systems that are planted into the ground as well as above it. One such plant is the cymbidium orchid, which has 40 species and many thousands of hybrids. Moreover, the cymbidium is considered one of the oldest species of the orchid family and has been known to grow around rocks and within trees. This orchid also seems to do very well in loose wood and leaf compost settings. The cymbidium orchid's natural origins string back to Australia, Southeast Asia, and Japan. They are a favorite to cultivate among beginning growers because they are so easy to take care of if given the right resources.