Composition of the essential oils of four endemicSideritis species from Turkey

Abstract

Sideritis phlomoides Boiss. & Bal., S. vulcanica Hub.-Mor., S. vuralii Duman & Bas¸er and S. caesarea Duman, Aytaç & Bas¸er are endemic species in Turkey. Water-distilled essential oils from the flowering spike of these plants were analysed by GC–MS. β-Pinene (35%), 1,8-cineole (15%) and α-pinene (15%) were the main components in the oil of S. vuralii, while β-caryophyllene (8%) and caryophyllene oxide (7%) were the major constituents in the oil of S. caesarea. The oils from S. phlomoides and S. vulcanica were found to contain β-caryophyllene (31% and 10%) as major constituents. α-Bisabolol (16%) was also found as a major component in the oil of Sideritis phlomoides. Copyright © 1999 John Wiley & Sons, Ltd.