Essential Oil Composition Of Two Scutellaria species from Tokat, Turkey

The genus Scutellaria L. (Lamiaceae) is represented in Turkey by 16 species, 1 natural hybrid, 38 taxa, 16 being endemic in Turkey (1,2) . Hydrodistilled essential oils of the aerial parts of Scutellaria altissima L. and Scutellaria orientalis L. subsp. pinnatifida Edmondson were analyzed by GC and GC-MS systems, simultaneously. The oil of S. altissima contained β-caryophyllene (34.7 %), caryophyll-5-en-12-al (14.4%), linalool (14.3%) and hexadecanoic acid (7.1%) as main constituents. The oil of S. orientalis L. subsp. pinnatifida was characterized by the occurrence of germacrene D (56.9%), β-caryophyllene (10.5%) and bicyclogermacrene (10.1%) as major components. To the best of our knowledge, this is the first report on the GC and GC/MS determination of the essential oil composition of the S. altissima and S. orientalis subsp. pinnatifida species studied.