LICHALP

Lecanora atromarginata (H. Magn.) Hertel & Rambold

Syn.: Lecidea atromarginata H. Magn.

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 nival belt (above the lower limit of perennial snow and glaciers)

Note: a holarctic species found on calciferous sandstone and basalt, with optimum above treeline, up to the nival belt; closely related to L. marginata, differing mainly in chemistry (usnic and stictic acids); from the Alps there are several scattered records.