Xanthosyne

Xanthosyne is fungal genus in the family Lecanoraceae. The genus was established in 2024 to accommodate a group of crustose lichens that had previously been classified under various names, most notably as Lecidea varians, which was originally described in 1814. These lichens form thin crusts on tree bark and are characterised by their variable appearance, ranging from pale grey to yellow-green, with small black fruiting bodies and diverse chemical compositions. The genus is most commonly found in the humid temperate forests of eastern North America, though it also occurs in parts of California and southern Europe....read more on Wikipedia.