A predominantly boreal Melanohalea. In the past, the species did not used to be distinguished from the very similar M. olivacea, from which it differs in smaller thallus, smaller apothecia present up to the thallus margins, and slightly smaller spores (6–7 × 10–13 µm). It also partly differs in ecology. The lichen grows on less acidic bark of willows and alders, but may be found also on birches together with M. olivacea. In central Europe, it occurs very rarely in mountains and alpine zones in raised bogs and on shrubs above the tree line. The species historical distribution in the Czech Republic is almost unknown and requires revision of herbarium records of M. olivacea, and possibly also of other members of the genera Melanelixia and Melanohalea that form apothecia. M. septentrionalis may in fact be more abundant in Czech herbaria than M. olivacea, as implied by the revision from the German territory (Wirth & Türk 1973). The only verified Czech records come from birches in Kvilda in the Šumava Mts. Currently, this lichen is considered extinct in the country.
Literature: Ahti T. (1966): Parmelia olivacea and the allied non-isidiate and non-sorediate corticolous lichens in the northern hemisphere. – Acta Botanica Fennica 70: 1–68. Wirth V. & Türk R. (1973): Über Standort Verbreitung und Soziologie der borealen Flechten Cetraria sepincola (Ehrh.) Ach. und Parmelia olivacea s. ampl. in Mitteleuropa. – Veröffentlichungen der Landesstelle für Naturschutz und Landschaftspflege Baden-Württemberg 41: 88–117.
taxonomic classification:Ascomycota → Lecanoromycetes → Lecanorales → Parmeliaceae → Melanohalea
most frequented synonyms:Melanelia septentrionalisAll records: 0, confirmed 0. One click on a selected square displays particular record(s), including their source(s).