LICHALP

Hymenelia rhodopis (Sommerf.) Lutzoni

Syn.: Ionaspis rhodopis (Sommerf.) Blomb. & Forssell, Lecanora acharii (Ach.) Sommerf. var. rhodopis Sommerf.

Lichenised.

Substrate: calciferous rocks

Altitudinal range: from the montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies) to the alpine belt (potential vegetation: treeless Alpine grasslands and tundras, to the lower limit of perennial snow and the equilibrium line of glaciers)

Note: a species with an epilithic, rimose, whitish thallus, small apothecia with pale pink discs, and broadly ellipsoid ascospores measuring 17-20 × 10-12 μm; common on calcareous stones; widespread in the Holarctic region, but not always distinguished from H. epulotica (with an endolithic thallus).