Evernia
Evernia is a genus of bushy lichens in the family Parmeliaceae. Description. Oakmoss "Evernia prunastri" is used as a fixative agent in Eau de Cologne within the perfume industry. It is green on top and white on bottom, and divides evenly into "forks"; it becomes very soft when wet. It is not to be confused with "Ramalina", which is straplike, stiff and bristly, green on top and bottom, and divides unevenly. "Evernia" is an abundant genus, found growing on trees.