Leaves of European weeds
Leaves of some European weeds.

What are leaves and what are they good for?

Leaves are important organs for plants. Not only can they smell and see with them, they can also use them for defence.

They excrete excess water through their leaves. The leaves of some species can even filter pollutants from the air.

Leaves produce oxygen.

Leaves are therefore an important organ not only for plants, but also for many other living organisms.

The cotyledons of Cichorium intybus
The cotyledons of Cichorium intybus.