LICHALP

Diplotomma venustum (Körb.) Körb.

Syn.: Buellia alboatra (Hoffm.) Th. Fr. var. venusta (Körb.) Th. Fr., Buellia suevica Bertsch, Buellia venusta (Körb.) Lettau, Diplotomma alboatrum (Hoffm.) Flot. var. venustum Körb., Diplotomma epipolium (Ach.) Arnold var. reagens J. Steiner

Lichenised.

Substrate: calciferous rocks,

Altitudinal range: from the mesomediterranean belt (potential vegetation: evergreen broad-leaved forests dominated by Quercus ilex) to the alpine belt (potential vegetation: treeless Alpine grasslands and tundras, to the lower limit of perennial snow and the equilibrium line of glaciers)

Note: this mild-temperate to Mediterranean lichen, at least when young, is a constant parasite on Protoparmeliopsis versicolor, reaching above treeline south of the Alps; widespread throughout the Alps.