Punctelia jeckeri is characterized by upturned pruinose lobe margins and predominantly marginal soralia. In the Czech Republic, it occurs scattered from lowlands to foothills, with a distribution center in lower elevations. It prefers well-lit habitats and is commonly found along roads, in avenues, at forest edges, or in tree crowns within forests. It grows primarily on the bark of deciduous trees, less frequently on conifers, on substrates with acidic to subneutral pH. The most common host trees are oaks, but ashes and lindens are also frequently colonized. Its overall range includes Europe and western to southwestern North America. In the Czech Republic, it is the most common representative of the genus.
A very similar lichen is P. perreticulata, which typically differs by having a foveolate thallus and longer conidia (> 6.5 µm compared to a maximum of 6 µm in P. jeckeri). It has not yet been recorded from the Czech Republic and is mainly distributed in the Mediterranean.
Literature: Lajblová M. & Malíček J. (2024): Terčovky rodu Punctelia v České republice [The genus Punctelia in the Czech Republic]. – Bryonora 73: 1–12.
taxonomic classification:Ascomycota → Lecanoromycetes → Lecanorales → Parmeliaceae → Punctelia
Red List (Liška & Palice 2010):VU – vulnerable
Occurrence in the Czech Republic
All records: 353, confirmed 332. One click on a selected square displays particular record(s), including their source(s).