Candelariella xanthostigma (Ach.) Lettau

The thallus of * C. xanthostigma* is composed of yellow granules, sometimes very tiny. Therefore, the species may resemble members of the Candelariella efflorescens agg. It is a relatively common lichen, especially on bark of deciduous trees (ashes and oaks). Seldomly, it may grow also on wood. It occurs mainly in open deciduous and mixed forests, but may be found also in parks and avenues. It avoids strongly eutrophicated and acidified habitats. The species is common both in Europe and the Czech Republic.

Candelariella xanthostigma belongs to a complex of a few similar epiphytic taxa, out of which two recently described species, C. faginea and C. boleana, may theoretically occur in the Czech Republic. These lichens are known primarily from the Mediterranean mountains, but less often, they have been reported also from lower elevations in the Alps, Carpathians and Caucasus. The species differ mainly by anatomical features, such as the number and shape of ascospores.

Ascomycota → Lichinomycetes → Candelariales → Candelariaceae → Candelariella