the essential oil from seeds and aerial parts of ferulago angulata (schlecht.) boiss growing in nevakoh and shahoo mountains, west of iran was studied by gas chromatography and gas chromatography-mass spectrometry constituents were. the major components of seeds gathered in nevakoh and shahoo were, respectively 24 and 26 constituents and found to be cis-ocimene (64.8 and 76.11%), alpha-pinene (15.4 and 7.29%), gamma-terpinene (5.9 and 2.88%), rho-cymene (4.1 and 1.4%), myrcene (1.9 and 1.05%) and bornyl acetate (0.9 and 1.69%). the major components of aerial parts gathered in nevakoh and shahoo were respectively, 34 and 30 constituents and found to be alpha-pinene (27.1 and, 25.7%), cis-ocimene (22.6 and, 27.9%), bornyl acetate (8.5 and 3.9%), germacrene d (6.5 and 22.3%), trans-verbenol (5.8 and 0%), myrcene (5.2 and 2%), beta-bourbonene (2.7 and 0%), p-mentah-1, 5-dien-8-ol (1.9 and 0%), sabinene (1.5 and 2.1%), linalool (1.5 and 0%), metyl eugenol (1.3 and 0%), bicyclogermacrene (1.3 and 0%) and alpha-terpineol (1.2 and 0%), 3-carene (0 and 1.9%), camphene (0 and 1.6%), gamma-element (0 and 1.1%) and beta-cubenone (0 and 1%).the major components which were common in both seeds and leaves and found to be, bornyl acetate, myrcene and trans-ocimene. the major components which were only found in aerial parts were germacrened, beta-bourbonene, camphene, sabinene and linalool. the major components which only were found in seeds: gamma-terpinene and rho-cymene.