LICHALP

Collema flaccidum (Ach.) Ach.

Syn.: Collema rupestre (Sw.) Rabenh., Lathagrium rupestre (Sw.) A. Massal., Lichen flaccidus Ach., Lichen rupestris Sw. nom.illeg., Parmelia flaccida (Ach.) Ach., Synechoblastus flaccidus (Ach.) Körb., Synechoblastus rupestris (Sw.) Trevis.

Lichenised.

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

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 mainly temperate to southern boreal-montane lichen with a fragmented holarctic range, found on bark, epilithic mosses, base-rich siliceous and slightly calciferous rocks in sheltered, humid situations; widespread throughout the Alps.