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.

foliose lichen

Lichen whose thallus resembles leaves or lobes that are loosely attached to their substrate and can be easily removed.

crustose lichen

Lichen whose thallus forms a crust that is firmly attached to its substrate.

fruticose lichen

Lichen whose thallus resembles a small tree; it is attached to its substrate at a single point.