Oregano
The related species Origanum onites (Turkey, Asia Minor) and O. heracleoticum (Italy, Balkan peninsula, West Asia) have similar flavours. A closely related plant is marjoram from Asia Minor. That plant has a completely different taste. This is  because phenolic compounds are missing in its essential oil. Some breeds show a flavour intermediate between oregano and marjoram. The Oregano plant is also commonly found in the mediterranean region, and the black sea.