Lichenogr. Universalis: 608 (1810).
Basionym: Lichen pollinarius Westr., Kongl. Vetensk. Acad. Nya Handl. 16: 56 (1795)
Synonym: Index Fungorum
Type: Howe (1913) noted that the type was possibly from Sweden, but that a Westring type was unknown. He noted that there were varietal types in the Acharius herbarium at H. Krog & James (1977) designated a neotype (H-Ach 1831D, var. humilis material) and an isoneotype (BM-Ach 804A).
Chemistry: Cortex K- or faintly K+, Cortex + (+)-usnic acid, Medulla: Evernic acid and/or obtusatic acid, orsellinic acid, Orsellinsäuremethylester, 3-Methyl-4-osymethylorsellinsäure (potentially Spaltprodukte). 2 unidentified substances in traces. Evernic acid 80 % of the secondary substances, obtusatic acid 15 %, usnic acid in traces (Follmann & Geyer 1983: 105). Evernic acid, obtusatic acid (Swinscow & Krog 1988: 286).
Ecology: Corticolous on trees in montane forest at 2900 to 3000 m altitude, rare (Swinscow & Krog 1988: 286).
Molecular data: Genbank
Distribution: Database
Based on Blanchon & Bannister (2004).