Peltigera horizontalis (Huds.) Baumg.

A well-identifiable Peltigera species, characterized by the flat rounded horizontal apothecia, and dark fasciculate rhizines in concentric circles. The lichen prefers forest environment and humid habitats. Sometimes, it is even recognized as an indicator species of localities with a longstanding forest continuity. It inhabits bases of older trees, logs, mossy stones and rocks and soil in both acidic and calcareous biotopes. In the Czech Republic, the species occurs sparsely from lowlands to mountains with the centre of distribution in mountain and submountain areas. During the 20th century, P. horizontalis declined in the country, probably in consequence of acid rain and changes in landscape management (Liška et al. 2006). In Europe, it is one of the common genus members, occurring mainly in mountains and rather oceanic parts of the continent.

Literature: Liška J., Palice Z., Dětinský R. & Vondrák J. (2006): Changes in distribution of rare and threatened lichens in the Czech Republic II. – In: Lackovičová A., Guttová A., Lisická E. & Lizoň P. [eds], Central European lichens – diversity and threat, p. 241–258, Mycotaxon Ltd., Ithaca.

taxonomic classification:

Ascomycota Lecanoromycetes Peltigerales Peltigeraceae Peltigera

Red List (Liška & Palice 2010):EN – endangered

Occurrence in the Czech Republic

All records: 171, confirmed 124. One click on a selected square displays particular record(s), including their source(s).


record after the selected year
record before the selected year
records without date
Doubtful and erroneous records are not displayed.
credible record
doubtful record
erroneous record
record without revision

Altitude preferences

Distribution Timeline

Substrate type

Substrate preferences

© Botanický ústav AV ČR, v. v. i. 2020–2024