Introductiontea, tree or bush, its leaves, and the beverage made from these leaves. The plant ( Camellia sinensis, Thea sinensis, or C. thea ) is an evergreen related to the camellia and indigenous to Assam (India) and probably to parts of China and Japan. In its native state, it grows to a height of about 30 ft (9.1 m), but in cultivation it is pruned to 3–5 ft (91–152 cm). The lanceolate leaves are dark green; the blossom is cream-colored and fragrant. Today tea is consumed by more people and in greater quantity than any beverage except water. The flavor of tea is due to volatile oils, its stimulating properties to caffeine, and its astringency to the tannin content (reduced in black teas by the fermentation process). In all parts of the world, tealike beverages (sometimes called tisanes) are made from the leaves or flowers of a wide variety of other plants, often for their medicinal properties.
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