LICHALP

Arthonia ruana A. Massal.

Syn.: Arthonia anastomosans (Ach.) Nyl., Arthonia beltraminiana (A. Massal.) Anzi, ?Arthonia rosacea Anzi, Arthoniopsis ruana (A. Massal.) Trevis., Arthothelium anastomosans (Ach.) Arnold, Arthothelium beltraminianum A. Massal., Arthothelium dispersum auct., Arthothelium ruanum (A. Massal.) Körb., Arthothelium rosaceum (Anzi) Zahlbr., Arthothelium ruanideum (Nyl.) Arnold

Lichenised.

Substrate: bark

Altitudinal range: from the submediterranean/colline belt (potential vegetation: mixed deciduous forests dominated by Quercus and Carpinus) to the montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies)

Note: a temperate, suboceanic species found on smooth bark of deciduous trees and shrubs (e.g. Alnus, Fagus, Fraxinus, Corylus, etc.) in humid forests, often on the basal parts of the trunks; widespread in the Alps, but generally not common.