Abstract
The authors examined the essential oils of Camellia Sasanqua Thunb., C. japonica Linn., and Thea sinensis Linn. from view point of chemical systematics and confirmed the existence of many interesting compounds.
From the comparison of these compounds, the existence of eugenol as the glycoside can be considered to be the characteristic of the genus Camellia. Thea sinensis do not contain any eugenol.
Together with the opposite results of the occurrence of L-pipecolic acid in the unripe fruits of tea tree but not in the fruits of camellia observed by M. Ozawa et al., the independence of Camellia and Thea will be hold rationally, against the merging Thea in Camellia.
