LICHALP

Diplotomma lutosum A. Massal.

Syn.: Buellia dispersa (Kremp.) Lindau, Buellia subdispersa Mig., Diplotomma alboatrum (Hoffm.) Flot. var. dispersum Kremp., Diplotomma dispersum (Kremp.) Arnold, Diplotomma subdispersum (Mig.) Etayo & Breuss

Lichenised.

Substrate: calciferous rocks, intermediate rocks (such as calciferous schists)

Altitudinal range: from the montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies) 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: an apparently widespread but rare, or at least rarely distinguished, mostly silicicolous species, characterised by 4-celled spores with transversal septa only, and by the I+ blue reaction of the medulla.