ملف:A lichen - Ochrolechia parella - geograph.org.uk - 1042725.jpg

English: A lichen - Ochrolechia parella. This is a species that is commonly found on acid rocks. The example shown here was growing on red sandstone in a disused quarry ( 1050247); several other examples of the same species occurred nearby.

Growth rings are often present at the margin, as is the case here. The lichen is usually grey; the unusual pink colouration seen here is a consequence of its growing upon red sandstone. Compare: http://www.theseashore.org.uk/theseashore/SpeciesPages/Lichen%20Section/Ochrolechia%20parella.JPG.html

This specimen is therefore not very typical in appearance. For a more typical example of this species, see: https://www.geograph.org.uk/photo/1258958.

For other lichens of the same genus, see: 995354 and 988263.