LICHALP

Tephromela atra (Huds.) Hafellner var. atra

Syn.: Lecanora atra (Huds.) Ach., Lecidea atroides Walt. Watson, Lichen ater Huds.

Lichenised.

Substrate: siliceous rocks, bark, lignum, intermediate rocks (such as calciferous schists)

Altitudinal range: from the mesomediterranean belt (potential vegetation: evergreen broad-leaved forests dominated by Quercus ilex) to the nival belt (above the lower limit of perennial snow and glaciers)

Note: a widespread, holarctic, polymorphic and ecologically wide-ranging species; in the eu-Mediterranean belt it is restricted to sheltered situations, but elsewhere it occurs in sun-exposed habitats; albeit rarely, it can also occur on bark; widespread and locally common throughout the Alps.