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Abstract
Lemon grass , cymbopogon , family poaceae (gramine) has many app;ications especially in medicine that encourage the autgor to study the Egyptian plant , The phytochemical screening reveals the presence of alkaloids, sterols and terpenenoids,tannins, coumarins and saponins . While the volatile oils that were extracted by steam distillation when analyzed by GC/MS showed the presence of citral as the main constituent in addition to linalyl iso-valerate , 6-methy-5hepten-2-one B, undecane , linalool,neric and geranic acid(the oxidized form of citral)and geranyl acetate,farmesol,a-bergamotene,(-)-caryophyllene oxide,neryl propionate in addition to different hydrocarbons,acids and ketones. The non-volatile fraction was extracted in a soxhlet apparatus first using light petroleum,then diethyl ether and finally methanol as successive solvents.