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City of Bonn

Tree 27: Evergreen oak

  • Quercus x turneri 'Pseudoturneri'
  • Europe

Genus

Quercus is the old Roman name for oak.

A deciduous (but there are also evergreen species), large, mighty, long-lived street, garden, park and forest tree with a strong landscape-shaping effect and overall ecological significance.

Oaks can live to be 1,000 years old; in Germany there are several specimens that are several hundred years old. It is an extensive genus with around 600 species, distributed in Europe, North Africa, Asia, North and South America.

In history and literature, the oak is firmly anchored as an oak of judgment and song; Celts, Goths, Germanic tribes and Romans worshipped it as a tree dedicated to the gods. Germanic tribes dedicated it to the thunder god Donar. The oak was regarded as a symbol of power and strength, the tree of man. The oak leaf wreath was a symbol of power and strength, a sign of victory.

The oak was and is valued as a medicinal plant with tannins and bitter substances. It is said to have anti-inflammatory, hemostatic and germicidal properties.

Information on the species

Quercus x turneri 'Pseudoturneri ' originated as a cross between Quercus ilex (holm oak) and Quercus robur (pedunculate oak) and was already known around 1800.

It is a shrub-like small tree with evergreen foliage and is planted in parks to enliven them in winter.

Growth: short trunk with a bushy, closed crown

Leaves: winter-green, elliptical, up to ten centimetres long, glossy dark green, remain on the tree until spring budding

Flowers: yellowish green in long catkins

Fruits: on several thin stems, acorn-shaped, approx. two centimetres long

Characteristics: sufficiently frost-hardy, early sprouting, therefore sensitive to late frost