The essential oil of Cinnamomum camphora (L.) nees and eberm. - Variation in oil composition throughout the tree in two chemotypes from eastern Australia

The camphor tree, Cinnamomum camphora (L.) Nees et Eberm., is a major environmental weed in parts of eastern Australia, particularly in northeastern New South Wales. It occurs in this region in two chemotypic forms, discriminated on the basis of leaf oil: camphor and 1,8-cineole. Oil was extracted from various parts of trees of each of these chemotypes: leaf fruit. branch, trunk and root. Analysis of the oil revealed that, for the camphor-type, caniphor content was greater in lc aves than in other tree parts, where cineole and saf'role were also present in substantial proportions: and, for the cineole-type, 1,8-cineole,,which with lesser quantities of sabinene and citronellol dominated the leaf oil, is reduced in significance in the trunk where camphor is also an important constituent.