LICHENI

Arid lands, poor in nutrients, favor the presence of numerous species of lichens, pioneer colonizers of soils that are inhospitable to plants.

After all, as they say, "Union makes strength"!
Lichens are a symbiotic association between an autotrophic organism (a fungus), a heterotrophic one (an alga or a cyanobacterium) and other unicellular organisms that are still little studied. This characteristic allows lichens to tolerate living conditions that are prohibitive for almost all other living things.

Below you can find some images of terrestrial lichens and their dedicated sheets, downloadable in PDF on the website page at this link.