Green tea Green tea Green tea is a type of tea that is made from "Camellia sinensis" leaves that have not undergone the same withering and oxidation process used to make oolong teas and black teas. Green tea originated in China, but its production and manufacture has spread to many other countries in Asia. Several varieties of green tea exist, which differ substantially based on the variety of "C. sinensis" used, growing conditions, horticultural methods, production processing, and time of harvest. Although there has been considerable research on the possible health effects of consuming green tea regularly, there is little evidence that
Camellia number of "Lepidoptera" species; see List of Lepidoptera that feed on Camellia. Leaves of the Japanese camellia ("C. japonica") are susceptible to the fungal parasite "Mycelia sterile" (see below for the significance). "Camellia sinensis", the tea plant, is of major commercial importance because tea is made from its leaves. The species "C. sinensis" is the product of many generations of selective breeding in order to bring out qualities considered desirable for tea. However, many other camellias can be used to produce a similar beverage. For example, in some parts of Japan, tea made from "C. sasanqua" leaves is popular. Tea