LICHALP

Placynthium rosulans (Th. Fr.) Zahlbr.

Syn.: Lecothecium rosulans Th. Fr., Placynthium pannariellum (Nyl.) H. Magn. var. rosulans (Th. Fr.) Degel.

Lichenised.

Substrate: calciferous 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 northern species found on moist siliceous rocks, e.g. in inundation zones along brooks, near or above treeline; known from a few localities in the Alps, but perhaps more widespread. The relationship with P. pannariellum still needs further study.