LICHALP

Microcalicium arenarium (Hampe ex A. Massal.) Tibell

Syn.: Calicium arenarium (Hampe ex A. Massal.) Hampe ex Körb., Coniocybopsis arenaria (Hampe ex A. Massal.) Vain., Cyphelium arenarium Hampe ex A. Massal.

Non- or doubtfully lichenised.

Substrate: siliceous rocks,

Altitudinal distribution: montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies)

Note: on silicicolous lichens, soil, rootlets, decorticated stumps and algal colonies under overhangs of siliceous rocks, often together with Psilolechia lucida; probably more widespread in the Alps than the few records would suggest.