Analysis of two samples of the oil of Acinus alpinus (L.) Moench subsp. meridionalis (Nyman) P. W. Ball revealed the following composition: monoterpene hydrocarbons (6.1 70, 14.1%), oxygenated monoterpenes (1.7%. 1.9"/0), sesquiterpene hydrocarbons (83.1%, 79.3%) and oxygenated sesquiterpenes (9.1Y0, 4.7%). The main constituents found were germacrene-D (56.8%, 43.2%), rram-p-caryophyllene (6.2%, 15.4%) and bicyclogermacrene (s.90/,, 11.7%). KEY WORDS Acinus alpinus ( L . ) Moench subsp. meridionalis (Nyman) P. W. Ball Lamiaceae Volatile oil Sesquiterpenes Germacrene-D tram-p-Caryophyllene Bicyclogermacrene.