LICHALP

Caloplaca paulii Poelt

Syn.: Variospora paulii (Poelt) Arup, Søchting & Frödén

Lichenised.

Substrate: siliceous rocks

Altitudinal range: from the subalpine belt (potential vegetation: open, taiga-like forests dominated by Larix decidua and/or Pinus cembra and Rhododendron) 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 a thick, areolate, dull orange thallus with indistinctly lobate marginal areolae, relatively large apothecia with zeorine margins (the thalline rim soon excluded), and narrowly fusiform ascospores with thin septa; on limestone and marl slates at high altitudes; also known from various Eurasian orobiomes and from Greenland, but rather rare.