the essential oils obtained by hydrodistillation of flowers, young leaves and epicormic branches of cinnamomum camphora chvar. borneol were comparatively studied by gas chromatography with flame ionization detector (gc/fid) and gc/mass spectrometry (gc/ms). among the verified constituents, oxy-terpene accounted for the most abundant constituent in all volatile oils (flowers 50.83%, leaves 70.75%, branches 78.22%). d-borneol, the characteristic oxy-terpene of the volatile oils of c. camphora chvar. borneol, was the highest-content compound among all the three parts (flowers 12.13+/-0.67 g/kg, leaves 17.22+/-0.85 g/kg and branches 4.47+/-0.79 g/kg), while camphor was absent in flowers, low in leaves (0.05+/-0.01 g/kg) but rich in branches (1.09+/-0.44 g/kg). these findings suggested that volatile oils from the leaves and flowers of c. camphora chvar. borneol would serve as a better resource for d-borneol preparation, and there might be an -pinene-borneol-camphor bioconversion during the growth time extension of c. camphora chvar. borneol (flower < leaf < branch)