Genus Mentha is a scientific classification that refers to a group of aromatic, perennial herbs known as mint. Common synonyms for Genus Mentha include peppermint, spearmint, and pennyroyal. Peppermint (Mentha piperita) is a hybrid of water mint and spearmint, and is widely used in cooking, medicine, and aromatherapy. Spearmint (Mentha spicata) is another popular herb that is used to flavor and freshen breath. And pennyroyal (Mentha pulegium) is a species of mint that has been used for centuries for medicinal purposes. In addition to these three species, other synonyms for Genus Mentha include bergamot mint, chocolate mint, and pineapple mint, among others.