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Abstract
The chemical composition of the essential oils from the aerial parts of two endemic Turkish species [Stachys amanica P.H.Davis and Stachys petrocosmos Rech. fil. (Lamiaceae)] grown in two different localities in Turkey was analyzed by GC and GC-MS in order to differentiate two closed species. The major components of the essential oil of S. amanica in Dadagli were found to be α-pinene, α-bisabolol, (E)-β- caryophyllene and germacrene D. However, the essential oil from S. amanica in Basyurt contains α-pinene, β-pinene and (E)-β-caryophyllene. On the other hand, the major components of the essential oil from S. petrokosmos in Dadagli were found to be α-pinene, α-bisabolol, α-zingiberene, (E)-β-caryophyllene and γ-curcumene. Moreover, the essential oil from S. petrokosmos in Belen contains α-pinene, γ-curcumene, α-bisabolol, 16-kaurene and α-zingiberene. The results were showed that these two species are similar to each other in volatile constituents.
