Syn.: Lecidea cacuminum B. de Lesd. non Vain. nec H.Magn.
Lichenised. Poorly known taxon.
Substrate: calciferous rocks
Altitudinal distribution: 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 a chalky white, rimose to areolate, relatively thick thallus (2-4 mm in diam.), the older areoles becoming somewhat lobate with rounded lobes and surrounded by a hypothalline black margin, black marginate apothecia (to 2 mm in diam.), an emerald green epithecium and hypothecium (?), 8-spored asci, and hyaline, oblong to subglobose, simple ascospores (5-7 × 2-4 μm); on (presumably) calcareous rocks in the high-alpine belt; only known from the type locality in the Eastern Alps (Switzerland).
