LICHALP

Thelidium tiroliense Zschacke

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

Note: a calcicolous species of the Th. pyrenophorum-group with a thin thallus in various shades of brown, subsessile ascomata with involucrellum reaching down to the base of the perithecium (or even closed), and 1-septate, ellipsoid ascospores (to c. 20 µm long); known from a few localities in the Eastern Alps (Austria).