A terricolous species specialized to substrates rich in heavy metals. It resembles P. uliginosa but differs in apothecia pigmentation; it has a conspicuous red-purple hypothecium reaction with KOH. In the Czech Republic, the lichen has a single locality in the Krušné hory Mts.
Literature: Palice Z., Malíček J., Peksa O. & Vondrák J. (2018): New remarkable records and range extensions in the central European lichen biota. – Herzogia 31: 518–534.taxonomic classification:
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