Composition of the Volatiles of Hyssopus officinalis (L.) and Thymus serpyllum (L.) from Uttarakhand Himalaya

The volatiles constituents obtained by hydro-distillation of all the aerial parts of two Lamiaceae plants were analyzed by GC and GC/MS. The Hyssopus officinalis (L.) was collected from Malari (Chamoli) while the Thymus serpyllum (L.) collected from three places Malari; Indradhara near Badrinath (Chamoli) and Chakrata (Dehradun) of the Garhwal region of Uttarakhand. H. officinalis essential oil identification showed 22 constituents representing 96.66 % of the oil, having monoterpene hydrocarbons (22.10 %), oxygenated monoterpene (74.24 %), one sesquiterpene hydrocarbon (0.18 %) and one oxygenated sesquiterpene hydrocarbon (0.14 %), while the extracted T. serpyllum essential oils led to the identification of 28 constituents representing 99.84, 97.13 and 97.11 %, respectively, having monoterpene hydrocarbons (10.11–19.7 %), oxygenated monoterpenoids (68.78–83.82 %), sesquiterpene hydrocarbons (5.74–7.60 %) and oxygenated sesquiterpene hydrocarbons (0.17–1.02 %). The major volatiles constituents of these essential oils were oxygenated monoterpenoids. Pinocarvone (32.14 %) and iso- Pinocamphone (30.70 %) identified as major volatiles constituents in H. officinalis. However, thymol (37.27–55.56 %) followed by thymyl methyl ether (3.26–12.93 %) were the major components presented in T. serpyllum .