Lobariella olivascens

Lobariella olivascens is a species of foliose lichen in the family Peltigeraceae. Found in Colombia, this leafy lichen forms tightly attached patches up to 12 centimeters across on tree trunks and branches in upper montane rainforests, with a distinctive olive-brown coloration when dried that gives the species its name. It can be identified by the large white spots on its surface that break open to form elongated pores, creating a mottled appearance that distinguishes it from similar species....read more on Wikipedia.