Protopannaria pezizoides (Weber) P.M. Jørg. & S. Ekman

A cyanolichen with a thallus composed of grey-blue to brown squamules and often also conspicuous apothecia with a lacerate margin. It grows on humus, bryophytes and plant debris, more rarely also on mossy tree trunks. The species prefers humid and well-lit stands. In mountains, it is often found near the upper tree line. In the Czech Republic, P. pezizoides used to be repeatedly recorded in the past. Today, it is only known from Velká Kotlina in the Hrubý Jeseník Mts and the Vydra valley in the Šumava Mts. Its decline is probably a consequence of acid rain, to which most cyanolichens are sensitive.

Ascomycota → Lecanoromycetes → Peltigerales → Pannariaceae → Protopannaria