LICHALP

Arthonia galactites (DC.) Dufour

Syn.: Arthonia marginella Dufour ex Nyl., Arthonia punctiformis Ach. var. galactina Ach., Opegrapha galactites (DC.) M. Choisy, Verrucaria galactites DC.

Lichenised.

Substrate: bark

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 species with optimum on the smooth bark of Fraxinus ornus, but also of Populus and even Pistacia; probably overlooked or/and confused with other species, but certainly not common in the Alps.