Citronella grass, Nardus, Nard grass, Mana grass. It is grown in Sri Lanka, India, Burma, Indonesia and Java. Citronella is the source of the commercial citronella oil, used in perfumery and as an insect repellent. The essential oils extracted from citronella grass are much used in aroma therapy as a stimulant when inhaled or rubbed on the skin, and an antiseptic that can be used to sterilize food preparation surfaces.