Abstract Essential oils isolated from the aerial parts of two different Lebanese wild populations of Dittrichia graveolens were analyzed by GC and GC/MS. It was shown that around 90% of the total composition consisted of oxygenated compounds. The four major components identified were bornyl acetate (70.6â72.3%), T-cadinol (1.4â13.4%), borneol (2.7â12.4%), and caryophyllene oxide (1.9â2.3%), in addition to 21 minor ones. Oils from the two populations possessed a high content of bornyl acetate but differed with respect to borneol and T-cadinol. In comparison with oils of D. graveolens from other populations, it was found that the oil of D. graveolens of Lebanese origin was distinctly richer in oxygenated compounds. Key Word Index: Dittrichia graveolens Inula graveolens Asteraceaeessential oil compositionborneolbornyl acetateT-cadinol