Its leaves
Waxy skin
When encountering a stinging tree in the wild, it is important to wear protective clothing such as long sleeves and pants to minimize skin contact. Avoid touching the tree or its leaves, and be cautious of any signs warning of stinging trees in the area. If stung, seek medical attention immediately.
One of the adaptations of the banana tree is it's big leaves which help it absorb sunlight.
their stinging tentacles are used to catch adult jellyfish and stuff it down their mouths.
the stinging ants living in the thorns of the acacia tree to keep animals from eating the acacia's leaves
Cofee is not a tree it is a shrub or bush.
the wood
everything
trunk
You squeeze some liquid out of the stinging nettle and just rub it on to where it stings
Stinging nettles have stinging hairs that release irritating chemicals when touched, deterring herbivores and humans from eating them. They also have a robust root system that allows them to quickly colonize disturbed environments and outcompete other plants.