Rhizocarpon reductum Th. Fr.

Rhizocarpon reductum is distinguished from other non-yellow species by the relatively small muriform spores and the common presence of stictic acid in the thallus. Following identification keys, specimens with well-developed spores may be misidentified as R. lavatum, which is macroscopically and ecologically different.

It is one of the most common brown Rhizocarpon species. It grows on acidic siliceous rocks and stones, often in humid microsites near the ground. It might also be found on anthropogenic substrates, such as walls, granite gravestones and rock monuments. In Europe, it is distributed at various elevations from the Mediterranean to Scandinavia. Likewise, it is abundant in the Czech Republic.

taxonomic classification:

Ascomycota Lecanoromycetes Rhizocarpales Rhizocarpaceae Rhizocarpon

most frequented synonyms:Rhizocarpon obscuratum

Red List (Liška & Palice 2010):LC – least concern

Occurrence in the Czech Republic

All records: 396, confirmed 155. One click on a selected square displays particular record(s), including their source(s).


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Altitude preferences

Distribution Timeline

Substrate type

Substrate preferences

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