Solorina bispora Nyl. var. subspongiosa (Zschacke) Frey

Syn.: Solorina bispora Nyl. f. subspongiosa Zschacke
Lichenised.
Substrate: calciferous soil, acidic soil (mostly on siliceous substrata)
Altitudinal range: from the subalpine belt (potential vegetation: open, taiga-like forests dominated by Larix decidua and/or Pinus cembra and Rhododendron) to the nival belt (above the lower limit of perennial snow and glaciers)
Note: the morph with a dominant cyanobacterial photobiont in the S. bispora-aggregate (comparable to S. spongiosa in the S. saccata-aggregate); on basic to subneutral soil at high elevations; not always distinguished, and probably more widespread in the Alps.
Austria: Tirol; Kärnten; Steiermark; Switzerland: Graubünden; France: Alpes-de-Haute-Provence; Haute-Alpes; Savoie;