Russian oak

Quercus pontica is a deciduous small tree or large shrub growing to 6–10 metres (20–33 feet) tall, with a trunk up to 40 centimetres (16 inches) in diameter and sparse, stout shoots. Its bark is greyish to purple-brown, smooth on young trees but becoming rough later in its life. Its leaves grow to 10–20 cm (4–8 in) long, rarely 35 cm, and 4–15 cm across. They are ovate, and have a serrated margin with numerous small, pointed teeth. The leaves are covered in hairs when they are young, but become smoother as they age. They become bright green later in life and turn yellow brown in autumn. The flowers are catkins, the male catkins 5–20 cm long. The fruit is a large acorn 2.5–4 cm long, produced in clusters of 2–5 together.