Abstract

The volatile oil composition of various parts of bitter fennel ( Foeniculum vulgare var. vulgare) growing as wild Turkish plants was investigated by gas-liquid chromatography. The major component of all oil samples was trans-anethole (29·70, 37·07, 54·22, 61·08, 64·71% in leaf, stem, flowering umbel, flower, fruit, respectively). The other main components were α-pinene in leaf, stem, flowering umbel, flower: α-phellandrene in leaf, stem, flowering umbel; fenchone in fruit oil. The volatile oils of flowering umbel, flower and fruit contained high amounts of oxygenated compounds, in gradually increasing percentages.

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