<jats:title>Abstract</jats:title><jats:p>The leaf essential oil obtained from <jats:italic>Idiospermum australiense</jats:italic> (Diels) S. T. Blake in 0.3–0.5% yield (based on fresh weight) consisted of monoterpenes and sesquiterpenes. Of the 41 compounds detected in amounts >0.05%, the principal components were bicyclogermacrene (48%) and caryophyllene (8%). The tricyclic sesquiterpene alcohols globulol, viridiflorol and spathulenol were also present each in approximately 5% amounts.