The essential oil components piperitone, menthol, geraniol, limonene, carvone, pulegone, caryophyllene, menthone, isomenthone, neoisomenthone P. cymene, borneol, piperitenone an a- terpinene were determined by GLC in 3 wild 'pecies of the genus Mentha collected from the River Danube ravine north east of Yugoslavia. Considerable variation was observed among some essential oil components; commercially this variation could be useful.
