Lemongrass (Cymbopogon spp.) is the common name for a genus of aromatic grasses widely cultivated for culinary, medicinal, and other practical purposes. The essential oil of lemongrass is high in citral, geraniol, limonene, and other constituents useful for flavorings, perfumes, and household applications. Medicinal: Tea used to treat digestive problems and fever. Anti-inflammatory.