Quercus sessiliflora is an oak tree species that is native to Europe and Western Asia. In English, it is commonly referred to as sessile oak due to its characteristic acorns that grow directly on the branch instead of having a stem or peduncle. There are several synonyms for Quercus sessiliflora, including Welsh oak, Bastard oak, Turkey oak, and Durmast oak. These terms often reflect the tree's geographic locations or specific characteristics such as its strong and durable wood known as "durmast." Regardless of its name, Quercus sessiliflora is celebrated for its beauty and resilience, making it a prized addition to any garden or landscape.