LICHALP

Lecidea rhagadiella (Nyl.) Th. Fr.

Syn.: Lecanora rhagadiella Nyl.

Lichenised.

Substrate: siliceous rocks

Altitudinal distribution: subalpine belt (potential vegetation: open, taiga-like forests dominated by Larix decidua and/or Pinus cembra and Rhododendron)

Note: a species of unclear relationships with an unusual combination of characters: thallus rather thick, rimose, whitish, with amyloid hyphae, urceolate to almost plane apothecia sunken in the thallus, a hyaline hypothecium, and rather large, broadly ellipsoid ascospores, based on a type from Northern Finland, with a few records from the Western Alps (France), on hard siliceous rocks at high elevations.