LICHALP

Lecanora compallens Herk & Aptroot

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 sorediate species recalling L. expallens (with which it often grows together) except the thallus colour, which is whitish-grey due to the lack of usnic acid (which is only detectable in the granular bluish-green soredia); on a wide variety of roadside trees, but avoiding those with very acid bark; rarely collected in the Alps at low elevations, more common in Western Europe.