Abstract
The aerial parts of Artemisia annua (Asteraceae), have been used in Iranian traditional medicine. Composition of the essential oil, which was obtained from the aerial parts of A. annua collected from Ilam-Iran, was determined by GC-MS. In total, twenty-five components (91.27 % of essential oil) were identified. Major constituents were α-pinene (7.33 %), camphene (5.68 %), sabinene (4.78 %), β-myrcene (22.41 %), 1,8-cineole (17.17 %) and camphor (20.41 %).