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 sinensis Robert Sweet shifted all formerly "Thea" species to the genus "Camellia" in 1818. The name "sinensis" means "from China" in Latin. Four varieties of "Camellia sinensis" are recognized. Of these, "C. sinensis" var. "sinensis" and "C. sinensis" var. "assamica" (JW Masters) Kitamura are most commonly used for tea, and "C. sinensis" var. "pubilimba" Hung T. Chang and "C. sinensis" var. "dehungensis" (Hung T. Chang & BH Chen) TL Ming are sometimes used locally. There are hundreds, if not thousands of cultivars of "C. sinensis." Some Japanese cultivars include: "Camellia sinensis" is native to East Asia, the Indian Subcontinent and Southeast