Herbal teas are known to have a long history all over the world. Herbal tea can be made from almost any edible plant. It is readily available as a huge variety and can easily be prepared by combining many ingredients, like tree bark, flowers, leaves, roots, spices, seeds, or fruit. Some argue herbal tea doesn't qualify as a "tea" since it is not derived from the Camellia Sinensis, also known as the tea plant. Once you really need a useful source about alvita teas, look at here.