Quercus petraea, commonly known as the sessile oak, Welsh oak, Cornish oak, Irish oak or durmast oak, is a species of deciduous oak tree native to most of Europe and into Anatolia and Iran. The sessil

Quercus protoroburoides, the Rila oak, is a deciduous species of oak endemic to the Rila Mountains of southwestern Bulgaria. Within Rila, the species is distributed only in five localities on steep, r