Quercus mongolica

The Mongolian oak is in the turkey oak group (Cerris), in the beech or Fagaceae family, and is native to Japan (the southern Kuriles), Manchuria, central and northern China, Korea, eastern Mongolia, and eastern Siberia (Sakhalin Island). It is a large tree, reaching up to 30 m in height.

• Leaves are deciduous, leathery, obovate (egg-shaped), 10–20 cm long and 4–11 cm across, with 7–10 broad teeth on each side, apex pointed, base rounded, hairless above, simple hairs beneath along veins, with 10–18 hairy vein pairs; petiole is short (2-8 mm long); leaves are crowded at the end of the shoot; leaf colour is dark red in the fall.
• Fruit is an ovoid, yellowish acorn 1.4–2.2 cm long and 1.1–1.6 cm in diameter, enclosed 1/3 to 1/2 in a cup with hairless scales; maturation takes 1 year.
• Bark is dull grey, deeply furrowed in older trees; twigs are hairless, angled, brown, with lenticels.