Mentha citrata (Family: Lamiaceae) a perennial herb originalted in central and southern Europe. It is also known as Bergamot mint, Eau-de-cologne Mint, Horsemint, Lemon Mint, Lime Mint, Orange Mint, Pineapple Mint, Su Nanesi, Water Mint, Wild Water Mint, and in Central America Yerba Buena. Even though it is listed here as a species it is probably better to regard it as a cultivar or cultivar group of Mentha aquatica
This herb has a characteristic lemon odor when crushed. It is sometimes used to make a tea similar to lemonade.