Oak trees are poisonous


Family / taxonomy


Plant type / habitat


Phytotherapeutic use


Toxicology / Toxicity



Forest plant: forests; kollin (-montan); all of Switzerland; Europe.


Tree up to 50 m high.
Bark:young trees: smooth, blue-green, shiny, quickly cracking; older: dark gray to brownish gray, deeply furrowed.
Branches:boy: ± soon.
Leaves:above: deep green glossy, underside: lighter, waxy blue-green, glabrous or scattered hairy, but never with star hairs, with protruding leaf veins; with 5-7 mostly blunt sections that face each other asymmetrically, with small ears at the base, leathery, alternate, stem: mostly less than 7 mm.
Blossoms:male: in drooping ears; female: inconspicuous, 2-5 leaf angles, short stalked.
Flowering time:April May
Fruit:Ripe fruit (acorn) egg-shaped, smooth, partially enclosed by the fruit cup (cupula), stalks of fruit much longer than leaves.
Fruit ripeness:September October

Likelihood of confusion

Other Quercus-Species

Poisonous plant parts

Fruits (unripe> ripe), leaves, bark, buds; Oak wood dust falls under the "substances clearly identified as carcinogenic".

Other Quercus species