Lemon grass (Cymbopogon citratus) is a tall, perennial grass native to India, Sri Lanka, and other tropical regions of Asia. It has a lemon-like scent and flavor and is used in many Southeast Asian dishes. The leaves and stems of the plant are used for cooking, and the essential oil from the leaves is used in aromatherapy. Lemon grass has a variety of medicinal properties and is said to help with digestive issues, reduce fever, and improve circulation. It is also used to make tea and is sometimes used as a natural insect repellent.