Derived by the process of steam distillation from either finely hacked fresh, partially dried, or dried stems and foliage of the 2 varieties of citronella plant called Cymbopogon nardus Rendle and Cymbopogon winterianus Jowitt, both the Ceylon citronella oil and Java citronella oils are potent essential oils. About 40% of the total oil today, is produced by China and Indonesia, the rest coming from countries, such as, Argentina, Brazil, Ecuador, Guatemala, Honduras, India, Jamaica, Madagascar, Mexico, Sri Lanka, South Africa, and Taiwan.