Xanthomendoza fallax Søchting, Kärnefelt & S.Y. Kondr.

Thallus yellow-orange, foliose, with marginal labriform soralia/groups of blastidia. Apothecia rare. Mostly saxicolous, on Ca-enriched, often dusty siliceous rocks. Closely related epiphytic X. huculica has helmet-shaped soralia, shorter and wider lobes and more abundant rhizines. In the Czech Republic, X. fallax is found from lowlands to middle altitudes, it is more abundant in areas with well-lit siliceous rocks, typically in river valleys (e.g., Vltava, Berounka, Jihlava, Oslava rivers). It is also known from limestone rocks of the Moravian karst. Herbarium material containing specimens from bark probably represents X. huculica, not distinguished previously, and requires revision.

taxonomic classification:

Ascomycota Lecanoromycetes Teloschistales Teloschistaceae Xanthomendoza

most frequented synonyms:Xanthoria fallax

Red List (Liška & Palice 2010):NT – near threatened
Red List (Malíček 2023):C3 – endangered

Occurrence in the Czech Republic

All records: 80, confirmed 71. One click on a selected square displays particular record(s), including their source(s).


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Altitude preferences

Distribution Timeline

Substrate type

Substrate preferences

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