An herbal tea, tisane, or ptisan is an herbal infusion mae from anything other than the leaves of the tea bush (Camellia sinensis). The English word "tisane" originated from the Greek word πτισάνη (ptisanē), a drink made from pearl barley. Strictly speaking, the name 'herbal teas' is a misnomer, as they are not made with real tea (Camellia sinensis), but by infusing other plants. In many countries (but not in the United States) the use of the word tea is legally restricted to infusions of Camellia sinensis (the tea plant).