Latin name: Quercus
Number of species: about 400 species of oak
circulation area: In all parts of the northern hemisphere
fruit: about 3cm long, egg-shaped acorns; wrapped in the upper area of the fruit cup
height: 30-40 m
Older: up to 1000 years
Properties of the bark: hard, rich in profiles
Properties of the wood: stable, hard
Locations of the tree: on barren and sandy soils, in locations up to 1500 m
leaf: Leaves are longitudinally cut, with two to five notches each in the leaf profile, in the summer juice-green color
Interesting about the oak
The genus of oak trees (Quercus) includes about 400 species of oak, of which the English oak and the Traubeneiche among the most common types in Germany.
Oak trees can reach an enormous age. 1000-year-old oak trees are rare, but not uncommon. Also in terms of the geological history, oaks are far ahead: Fossil finds of at least 10 million years are documented.
The fruits (acorns) are indeed nutritious because of their high content of starch, but because of the bitter substances for humans inedible and poisonous. For rodents (mice, squirrels), red deer and boars, the acorns are indispensable carbohydrate and protein sources, which makes them particularly suitable for rodents in winter storage.
Oak populations are threatened especially by fungi, i.a. the oak mildew. This fungus affects young shoots and causes the withering and falling of the leaves. But also the larvae of the butterflies of the oak winder and the oak procession moth endanger oak trees by their massive Blattfraß.