Physcia stellaris

Foliose lichen, with lobes without marginal cilia, lobe surfaces ± smooth or with faint white flecks (pseudocyphellae). The centre of the thallus is often warted, with a rather untidy look to the whole thallus. Soralia absent; apothecia with brown to black, thinly pruinose discs, margins regular to somewhat irregular with small, swollen warts or lobes. The yellow lichen could be Candelaria concolor.