Black tea is a type of tea that is more oxidized than oolong, yellow, white and green teas. Black tea is generally stronger in flavor than other teas. All four types are made from leaves of the shrub Camellia sinensis. Two principal varieties of the species are used – the small-leaved Chinese variety plant, used for most other types of teas, and the large-leaved Assamese plant, which was traditionally mainly used for black tea, although in recent years some green and white teas have been produced. In China, where black tea was developed, the beverage is called 紅茶 "red tea", due to the color of the oxidized leaves when processed appropriately.