Golden shield lichen ( Xanthoria parietina )

yellow lichen


A lichen is formed of two or more organisms,a fungus which forms the body of the lichen which

in Xanthoria parietina consists of flattened spreading leaf-like lobes,
and a green chlorococcoid alga which provides the nutrients for the fungus through photosynthesis.


Xanthoria parietina belongs in the family Teloschistaceae which consist mainly of brightly coloured
lichens that contain a compound that acts as both a sunscreen for the algal partner
and also protects them from harmful UV rays.

Hence Xanthoria is often found in sunny exposed places.

More info on : Natural History Museum


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