Camphor comes from a tall, handsome evergreen tree in China with many branches bearing clusters of small white flowers followed by red berries. The crude camphor oil is collected from trees in crystalline form, and the essential oil is produced by steam distillation from the wood, root stumps, and branches and then rectified under vacuum and filter pressed to produce three fractions known as white, brown and yellow camphor, with white camphor being the one used for aromatherapy. Read more about this incredible ingredient here.