Phlyctis agelaea (Ach.) Flot.

Phlyctis agelaea has a white-grey to pale grey thallus, surrounded by a white prothallus and has a K+ yellow, gradually turning red reaction due to the content of norstictic acid. It forms irregular apothecia, which might resemble soralia at first sight. There are two large muriform spores in each ascus.

The lichen strongly prefers smooth bark of deciduous trees with higher pH, most commonly in humid forests. Its distribution has oceanic tendencies. In central Europe, it is abundant in the Alps (Nimis et al. 2018), elsewhere rare. It was repeatedly recorded in the Czech Republic during the first half of the 20th century (see the Vězda & Liška 1999 catalogue). Recently, it is only known from the Punkevní žleb valley in the Moravian Karst and flood-plain forests in the Soutok area (South Moravia).

Literature: Nimis P. L., Hafellner J., Roux C., Clerc P., Mayrhofer H., Martellos S. & Bilovitz P. O. (2018): The lichens of the Alps – an annotated checklist. – Mycokeys 31: 1–634.

taxonomic classification:

Ascomycota Lecanoromycetes Ostropales Phlyctidaceae Phlyctis

Red List (Liška & Palice 2010):RE – extinct
Red List (Malíček 2023):C1 – critically endangered

Occurrence in the Czech Republic

All records: 7, confirmed 7. 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