LICHALP

Thelidium subsimplex Zschacke

Lichenised.

Substrate: calciferous rocks, intermediate rocks (such as calciferous schists)

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 calcicolous species of the Th. pyrenophorum-group with a rather thick, whitish thallus, finally hemispherically protruding ascomata (to c. 0.3 mm in diam.) with involucrellum reaching down about two thirds the perithecium, and most ascospores unicellular, with some 1-septate ones intermingled (to c. 20 µm long); known from a few scattered localities in the Alps.