Alyxoria culmigena

Alyxoria culmigena is a species of script lichen in the family Lecanographaceae. The species forms a very thin, often barely visible greyish or brownish film on bark, with narrow dark fruiting bodies that appear as short script-like lines scattered across the surface. It grows mainly on smooth bark of shrubs and trees in sheltered, humid locations such as coastal hedgerows, and is characteristic of mild lowland climates with warm winters. The lichen is widely distributed in western and southern Europe and has also been recorded from tropical oceanic islands including the Caribbean and the Andaman and Nicobar Islands. ...read more on Wikipedia.