A rare boreal microlichen with specific ecological requirements. It usually grows on soaked, minimally decomposing hardwood, semi-submerged in water. In the Czech Republic, it has been recorded only on spruce logs impregnated by humic acids in peaty waters by the shores of oligotrophic glacial lakes in the Šumava Mts. In north Europe, in is most often found in clear, running water in forests, usually on wood, infrequently also on bark or periodically inundated stones.
Literature: Palice Z. (1999): New and noteworthy records of lichens in the Czech Republic. – Preslia 71: 289–336.taxonomic classification:
All records: 7, confirmed 6. One click on a selected square displays particular record(s), including their source(s).