The aquatic environments

These environments include still water, such as lakes and ponds, and running water such as rivers, streams, streamlets and ditches.
Here we can find highly specialized plants, able to live in environments without oxygen (actually, plants are unable to make use of the oxygen that makes up the water molecules).
They can grow completely submerged in water (mainly algae), floating on the surface of the water (common duckweed), anchored to the bottom by long stems that allow the leaves and flowers to emerge from the water (water buttercup, common water lily).