The essential oil of Pogostemon travancoricus Bedd. var. travancoricus collected from the Agasthyamalai region of Tamil Nadu, India was analyzed by GC and GC-MS. The major components of the oil were bicyclogermacrene (16.0%), cis-calamenene (6.3%), germacrene B (11.1%), spathulenol (7.6%),