Lemongrass is a tropical herb scientifically known as Cymbopogon citratus, widely used in Southeast Asian cooking for its fresh citrus aroma and flavor. The plant grows as tall green stalks with long, narrow leaves and belongs to the grass family. Its lower stalk is the most commonly used part in cooking, providing a strong lemon-like taste without the acidity of real citrus. Lemongrass is often added to soups, curries, stir-fries, marinades, and herbal teas. It is a key ingredient in dishes such as Thai Tom Yum soup. Besides cooking, lemongrass is also valued for its essential oils and traditional medicinal uses.