Cymbopogon, commonly known as lemongrass (UK: /ˈlɛmənˌɡrɑːs/; US: /ˈlɛmənˌɡræs/) is a genus of Asian, African, Australian, and tropical island plants in the grass family.Some species (particularly Cymbopogon citratus), are commonly cultivated as culinary and medicinal herbs because of their scent, resembling that of lemons (Citrus limon).