Contribution to the knowledge of some poorly known lichens in Poland. II. The genus Psilolechia
Psilolechia leprosa is reported as new to Poland and Sudetes Mts. It was found on metal enriched melaphyre rocks. The distribution of P. clavulifera is reviewed and the new records show it has been very much undercollected. The chemistry of P. lucida in Poland was investigated and it was found to produce more substances of unknown structure, than previously reported.