Abstract The seeds of two populations of oregano (O. cordifolium) harvested in Cyprus were sown at a research station in France. The resulting plants were planted in triplicate in a Fischer block design. The oils, which were produced by hydrodistillation, were analyzed by GC and GC/MS. The oils were found to be rich in Î±-terpineol (45.9â55.7%) of homogeneous composition irrespective of their origin or replicate.