abstract the essential oil was isolated by hydrodistillation from the aerial parts of nepeta pogonosperma jamzad et assadi in 1.70% w/w yield. the oil was analyzed by capillary gc and gc/ms. among the 28 compounds identified, the major components were 4aa,7a,7a-nepetalactone (57.6%), 1,8-cineole (26.4%) and -pinene (3.7%). key word index: nepeta pogonosperma lamiaceaeessential oil composition4a-7-7a-nepetalactone1,8-cineole