Lecidea atrobrunnea (DC.) Schaer. subsp. porphyrilica Hertel & Leuckert
Lichenised.
Substrate: siliceous rocks
Altitudinal range: from the alpine belt (potential vegetation: treeless Alpine grasslands and tundras, to the lower limit of perennial snow and the equilibrium line of glaciers) to the nival belt (above the lower limit of perennial snow and glaciers)
Note: a rare chemical strain of the L. atrobrunnea-complex containing only porphyrilic acid; on siliceous rocks at high elevations; distribution insufficiently known.
Switzerland: Graubünden; Uri; Valais;
