Visual Dictionary
Subscribe
The Visual
Virtual Human Body
Language:
English
French
Spanish
Look up an image:
Explore by theme
About the Visual
Books
Games
HOME
>
vegetable kingdom
>
lichen
lichen
Vegetable formed from the symbiotic association of an alga and a fungus.
structure of a lichen
examples of lichens
There are more than 20,000 species of lichen, found growing out of the soil, on tree trunks or on rocks; they grow in all climatic zones.