ABSTRACT
The chemical composition of the essential oil of the aerial parts of Teucrium polium L. collected during the flowering period from, northern region of Saudi Arabia, (Aljuf, kingdom of Saudi Arabia) has been studied by GC and GC/MS. 114 compounds were identified amounted to 88.51% of the total oils. The presence of sesquiterpenoid hydrocarbons (34.62%) characterizes the oil of Saudi Arabian germander. While, T. polium oil is also rich with hydrocarbons monoterpenes (26.08%), oxygenated monoterpenes (11.14%) and oxygenated sesquiterpenoids (11.79%). The dominant constituents (52.17%) wereγ-muurolene (8.72%), α-cadinol (5.93%), δ-cadinene (5.08%), β -pinene (4.58 %), β-gurjurene (4.43 %), α-limonene (4.29 %), α-Pinene (3.79 %),α-Thujene (3.69%), Spathulenol (3.42 %), p-cymene (2.95%) γ-cadinene (2.81%)and Sabinene (2.47 %).