LICHALP

Buellia longispora Scheid.

Lichenised.

Substrate: siliceous rocks

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 species of the B. dispersa-group with a white thallus reacting K+ yellow, then red, a I+ blue medulla, sessile apothecia, narrowly ellipsoid ascospores with a rugulate ornamentation (to 30 µm long); on steep rock faces of siliceous rocks, from the Alps known from a few localities below the subalpine belt.