Chiliadenus iphionoides (Asteraceae), a shrub endemic to the Mediterranean region and widespread throughout Israel, is used in the traditional eastern Mediterranean medicine. Although recent research confirmed its pharmacological potential, C. iphionoides essential oil has not been adequately characterized chemically. Essential-oil samples were collected from representative wild populations throughout Israel and characterized by GC/MS analysis. Considerable interpopulation variation was found for the composition of the essential oils. Multivariate analysis showed a significant correlation between the chemical composition and the geographic location, with three main chemotypes identified.
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