Xanthoparmelia subverrucigera

Xanthoparmelia subverrucigera is a species of saxicolous (rock-dwelling), foliose lichen in the family Parmeliaceae. It was formally described in 2005 from specimens collected in Embid de la Ribera, Spain. The lichen forms yellowish-green, flat growths measuring 3–5 centimetres across with irregular lobes that adhere closely to the rock surface. Its distinctive features include a wrinkled surface with black-edged margins, small finger-like projections (isidia) that may branch in a coral-like manner, and a brown underside with simple root-like structures. The species has a disjunct distribution, occurring in both southern Europe and southern Africa, and can be distinguished from similar species primarily by its brown lower surface and specific chemical composition....read more on Wikipedia.