Oregano is a perennial, aromatic herb from the mint family, Lamiaceae, characterized by square stems, oval leaves, and clustered white to purple leaves. Its herbaceous flavor has tantalized the taste buds of Italian, Greek, and Mexican chefs alike and adds a traditional freshness to pizzas, pastas, and roasted vegetables. Widely used by the ancient Greeks and Chinese, oregano also once served as an herbal remedy for treating sore muscles, irritated skin, and upset stomachs.