DIONYSIA IS A genus containing 50-plus species of perennial plants from the primrose family (Primulaceae), closely related to the genus Primula and native to southwest Asia, particularly in Afghanistan, southeast Turkey, and Iran. Two different mountain ranges are important for dionysias in Iran. The Elburz in the north and the Zagros Mountains running from northwest to southeast. The Zagros range, in particular, has a diversity of locations with different species. Iran is a huge country and to visit all those interesting locations you need to travel more than 1,200 miles (2000 km). The main roads are of good quality but getting into the mountains you definitely need a four-wheel drive car.