Rhizocarpon geographicum (L.) DC.

in Lamarck & de Candolle, Fl. franç., Edn 3 (Paris) 2: 365 (1805).

Basionym: Lichen geographicus L., Sp. Pl. 2: 1140 (1753).


Description: Lichen. Thallus crustose, areolate, Data lacking.

Photobiont: Trebouxioid green alga.

Chemistry: Several chemical races:
Race I: Rhizocarpic acid in the cortex, psoromic acid in the medulla.
Race II: Cortex Small amount of rhizocarpic acid in the cortex, much barbatic acid in the medulla (Scottland, Feuerer unpubl.).

Ecology: On silicious rock.

Distribution type: Data lacking.

Taxonomy: Data lacking.


Distribution Database: Distributions

Distribution Database: Discover Life

Picture Database: Tropical Lichens

Molecular Database: Genbank

Synonym Database: Index Fungorum

Synonym Database: Mycobank