volatile constituents obtained from crushed fruits and aerial parts of grammosciadium pterocarpum boiss. (apiaceae) by microdistillation were analyzed by gas chromatography (gc) and gc-mass spectrometry (gc-ms) systems, simultaneously. fifteen components comprising 99.5% of the volatile oil of the fruit and twenty components comprising 97.4% of the volatile oil of the aerial parts were identified. the main constituents of the fruit volatiles were found to be linalool (68.4%) and -pinene (22.0%), whereas caryophyllene oxide (55.1%) and -caryophyllene (15.3%) were found to be major constituents in the volatiles of the aerial parts.