Herbal tea, or tisane, is any beverage made from the infusion or decoction of herbs, spices, or other plant material in hot water, and usually does not contain caffeine. These drinks are distinguished from caffeinated true teas (black, green, white, yellow, oolong, etc., which are prepared from the cured leaves of the tea plant, Camellia sinensis), as well as from decaffeinated tea, in which the caffeine has been removed. In addition to serving as a beverage, many herbal teas are also consumed for their perceived medicinal benefits.