Quercus petraea - Winter oak, Sessile oak syn. Quercus sessiliflora). Originally indigenous to large parts of Europe, including the Netherlands. Height up to 25 m. Strongly resembles Quercus robur. However, it generally has a straighter main trunk and the branches are more inclining. As a result, it has a more regular crown. Leaf more regularly lobed with a yellowish midrib and petiole (10-20 mm). The buds are pointier and longer, especially the terminal centre bud. Buds two weeks later than Quercus robur, and retains its leaf longer. The acorns are sitting, almost stalkless. Slightly less demanding soil requirements than Quercus robur, slightly drier soils if not too poor. Tolerates acidic soils (pH 3-4), but does not endure flooding in riverbanks. For roadside and avenue planting in the countryside.