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Quercus protoroburoides
Quercus protoroburoides, the Rila oak (Bulgarian: рилски дъб), 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, rocky south-facing slopes of the Rilska River valley, at the tree line between 1,500 to 1,750 metres (4,920 to 5,740 feet) above sea level. The Rila oak was first discovered in 1968 and officially accepted as a distinct species in 2017.
Quercus protoroburoides grows scattered or in small groups, higher than the local sessile oak (Quercus petraea) or fir-beech forests. In terms of morphology, it most closely resembles the Strandzha oak (Quercus hartwissiana) and the sessile oak, but it has a specific leaf epidermis and a very distinct distribution.
Quercus acatenangensis · Mapleleaf oak · Quercus acherdophylla · Quercus acrodonta · Quercus aculcingensis · Red Wood Evergreen Oak · Quercus acutangula · Quercus acutifolia · Sawtooth oak · Quercus aerea · African Oak · Quercus affinis
Text excerpted from the Wikipedia article Quercus protoroburoides by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
