Pennyroyal, aka Mentha Pulegium, is an herbaceous perennial in the mint family native to Europe, North Africa, and the Middle East. Pennyroyal is known for its intense aromatics and has a history of use since ancient Greece for its beneficial properties. Pennyroyal leaf can be used lightly as a flavoring agent in herbal teas and in cooking. Also spelled penny royal, this herb should be used with caution and respect.