Usnea silesiaca, nový druh provazovky pro Českou republiku

In a historical mixed specimen of beard lichens from Mt Ždánidla in the Šumava Mts deposited in the National Museum in Prague (PRM 501167), the oceanic species Usnea silesiaca, which had not yet been recorded for the Czech Republic, was discovered. The species and the locality are briefly commented on.