Commonly found in Asia, South and Central America, orchids belong to the largest plant families with more than 25,000 species. The name orchid originates from the Greek "orchis" meaning "testicle" because of the shape of the bulbous roots. Orchids were collected extensively during the 19th Century and are divided into three categories, namely climbing, epiphytic and terrestrial. They are parasites in nature as they grow on wild trees and love dead trees. To germinate, an orchid's seed needs to be penetrated by fungus threads.