abstract a hydrodistilled oil from corymbia citriodora hook. produced from leaves harvested in the r'eunion island was analyzed by gc and gc/ms on nonpolar and polar columns, respectively. nearly 100 constituents were identified. the major constituents were citronellal (63.6%), -citronellol (7.3%), isopulegol isomers (6.5%), citronellyl acetate (2.6%), p-cymene (2.5%), citronellal dimmers (2.5%), -pinene (2.1%) and -caryophyllene (1.2%). several esters of isobutyric acid (4), monoterpene- (18), and sesquiterpene (15) hydrocarbons, oxides (6), monoterpene alcohols (10), esters (8) and aldehydes (4), (z)-jasmone, citronellyl citronellate, citronellic acid, eugenol, and some aliphatic and alicyclic derivatives, were presented in trace amounts. on the polar column, further constituents were identified, including menthone, isomenthone, 4-vinylguiacol, and two heavy aliphatic acids: myristic and palmitic acids.