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City of Bonn

Tree 19: Columnar oak

  • Quercus robur "Fastigiata"
  • Europe, Asia Minor

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. Among other things, it is said to have an anti-inflammatory, hemostatic and germicidal effect.

Information on the species

Quercus robur "Fastigiata"

The columnar oak is a deciduous, large, mighty, columnar tree, up to 40 meters high and six meters wide.

Bark: gray-brown furrowed

Leaves: elongated lobed, up to 15 centimetres long, dark green; short stalk base, magnificent yellow-brown autumn coloration

Flowers: monoecious; male flowers conspicuous with drooping catkins, up to four centimetres long; female flowers: long-stemmed spikes

Fruits: egg-shaped acorns, two to five centimetres long, in the base of the fruit cup, with stalks up to twelve centimetres long (pedunculate oak)

The crowns of columnar oaks are somewhat spreading in the seedlings. The "Fastigiata Koster" variety is tightly columnar.

It is a valuable, long-lasting design element in garden design in parks, gardens and the landscape, on buildings, squares and borders as well as a counterpoint to round, umbrella-like and horizontal crowns.