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Huiles essentielles de certains plantes médecinales libanaises de la famille des Lamiaceae

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Blooming peaks of certain Lebanese medicinal plants have been identified and collected from various altitude and Lebanese regions. They have been hydro-distilled by the Clavenger method, and the physical and chemical properties of the essential oils have been determined. The yield ofEO varies between 0.7 and 2.2 % v/w ofplant material. The odor is characteristic but the color varies according to seasons. The principal components ratios of EO have been evaluated. They have shown a wide diversity within each species and variety of Lamiaceae family. Three categories were characterized, the menthol plants (Mentha, Micromeria barbata, Micromeria myrthifolia); the thymol plants (Origanum majorana, Origanum syriacum) and the highly volatile terpene plants known to be rich in Eucalyptol, a & fJ-pinene (Rosmarinus officinalis, Salvia libanotica). Lebanese plants are considered to have a low toxic effect since smaller percentage ofpulgone, carvacrol and p-thujone as compared to same species from Europe was determined. Their minor components adapt favorably with the major components bringing out a synergetic effect to play important role in the medicinal use or elsewhere.

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