Amandinea maritima

Amandinea maritima is a species of corticolous (bark-dwelling), crustose lichen in the family Caliciaceae. This whitish to creamy-coloured lichen forms thin, continuous layers on its substrate, primarily juniper species in coastal dune ecosystems. It is distinguished by its black reproductive structures, which develop from within the thallus and mature to reach up to 0.6 mm in diameter. Found exclusively in coastal regions, its range includes the western Mediterranean coastline, southern Portugal, the Azores, and the Canary Islands, where it occurs alongside other maritime lichen species adapted to similar environmental conditions....read more on Wikipedia.