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Abstract:
Mentha longifolia (L.) L. (family: Lamiaceae), commonly known as wild mint, is an extremely variable perennial and strong aromatic herb. The hydrodistilled essential oil of M. longifolia population growing wildly in high altitudes of Western-Himalayan region was analyzed using gas chromatography/flame ionization detector (GC-FID) and GC-mass spectrometry (GC-MS). A total of fifty-five constituents, forming 97.5 % of the total oil composition were identified. The oil was characterised by high amount of oxygenated monoterpenes (74.0 %) and sesquiterpene hydrocarbons (18.0 %). The characteristic constituents of the oil were trans- piperitone epoxide (48.7 %), piperitenone oxide (21.2 %), germacrene D (9.8 %), (E)-caryophyllene (2.3 %), 2- hydroxy piperitone (1.6 %), α-humulene (1.5 %), thymol (1.4 %), and α-longipinene (1.0 %). The essential oil composition of the presently studied M. longifolia population differed considerably, especially in trans-piperitone epoxide content with earlier reports from India.