From the longer Wikipedia page [1]
Cymbopogon (lemongrass) is a genus of about 55 species of grasses, (of which the type species is Cymbopogon citratus) native to warm temperate and tropical regions of the Old World and Oceania. It is a tall perennial grass. Common names include lemon grass, lemongrass, barbed wire grass, silky heads, citronella grass,cha de Dartigalongue, fever grass, tanglad, hierba Luisa or gavati chaha amongst many others.
It is often used as a tea in African countries such as Togo, south eastern Ghana Volta Region and the Democratic Republic of the Congo and Latin American countries such as Mexico.
Varieties are much used in cooking, perfumery and herbal products, and as a component of teas.