LICHALP

Acarospora umbilicata Bagl.

Syn.: Acarospora cinerea (Nyl.) Wedd., Acarospora percaenoides (Nyl.) Flagey, Acarospora rufidulocinerea Hue

Lichenised.

Substrate: siliceous rocks

Altitudinal range: from the mesomediterranean belt (potential vegetation: evergreen broad-leaved forests dominated by Quercus ilex) to the montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies)

Note: a mild-temperate, mainly Mediterranean-Atlantic species found on steeply inclined sunny faces of basic siliceous substrata, on roofing tiles and brick; widespread but rare in the Alps.