LICHALP

Placynthium pannariellum (Nyl.) H. Magn.

Syn.: Pterygium pannariellum Nyl.

Lichenised.

Substrate: siliceous rocks

Altitudinal range: from the submediterranean/colline belt (potential vegetation: mixed deciduous forests dominated by Quercus and Carpinus) to the subalpine belt (potential vegetation: open, taiga-like forests dominated by Larix decidua and/or Pinus cembra and Rhododendron)

Note: a species somehow resembling P. flabellosum, from which it might not have been always distinguished, but with a squamulose, olive-brown thallus on a bluish-black prothallus, narrow, elongated marginal lobes which are only loosely attached to the substrate, a convex upper surface with longitudinal fine grooves, the central squamules with isidioid to ligulate outgrowths of variable length; rarely fertile; on temporarily inundated siliceous rocks along streams and lake shores; widespread in Europe but much more common in the North.