abstract the oils obtained by steam distillation of the leaves and flowers of hippomarathrum microcarpum (m. b.) b. fedsch. growing wild in iran were investigated by a combination of gc and gc/ms. thirty-one compounds in the leaf oil, and 28 compounds in the flower oil have been identified. the main constituents of the leaf oil were -caryophyllene (26.4%), -muurolene (19.0%) and iinalool (6.1%); the major components of the flower oil were -caryophyllene (18.5%), -muurolene (19.2%), thymol (6.9%), camphene (6.4%) and iinalool (5.9%).