A lichen forming soralia with finely farinose greenish soredia on protruding lobes. The matt, brown to black, dichotomically branched rhizines are absent at lobe margins.
Hypotrachyna revoluta is usually found on branches of deciduous wooden plants and larches. Less often, it may be seen on siliceous rocks in well-lit forests and in open landscape. The species occurs from tropics to temperate zone on all continents, including European areas with a mild, humid climate. Until the 1950s, the lichen was sparsely distributed across the Czech Republic, usually growing on Alnus glutinosa. Later, it almost disappeared due to air pollution. In the first decade of the 21st century, the species was known from only a few localities in river valleys, exclusively (with a single exception found on pine root) on rocky substrates (Vondrák & Liška 2010). However, recently, the species has been reported growing epiphytically mainly in larch plantations, on shrubs, less often in well-preserved deciduous forests, or even in urban areas (Šoun et al. 2017). Some of the old data published under this name may belong to H. afrorevoluta, which did not use to be identified in the past.
Literature: Vondrák J. & Liška J. (2010): Changes in distribution and substrate preferences of selected threatened lichens in the Czech Republic. – Biologia 65: 595–602. Šoun J., Bouda F., Kocourková J., Malíček J., Palice Z., Peksa O., Svoboda D. & Vondrák J. (2017): Zajímavé nálezy lišejníků z čeledi Parmeliaceae v České republice. – Bryonora 60: 46–64.
taxonomic classification:Ascomycota → Lecanoromycetes → Lecanorales → Parmeliaceae → Hypotrachyna
Red List (Liška & Palice 2010):CR – critically endangered
Red List (Malíček 2023):C3 – endangered
Occurrence in the Czech Republic
All records: 111, confirmed 108. One click on a selected square displays particular record(s), including their source(s).