Physciella chloantha

About

Physciella chloantha is a species of foliose lichen in the family Physciaceae. The lichen, which occurs in diverse regions including the Upper Midwest of the US, Europe, Japan, Pakistan, and European Russia, is common in certain areas. Its thallus forms circular patches up to 3 cm in diameter, made up of many small, discrete lobes that can grow together to cover large areas, often intermingling with other lichen species. These lobes, which vary from short and rounded to slightly elongated, have numerous soralia on their edges and surfaces, while the undersides are white to pale tan with sparse rhizines. Apothecia are uncommon in this species. Physciella chloantha is known to grow on bark and on rocks.

Summary from Wikipedia