Preliminary studies of the Cladonia chlorophaea group (Cladoniaceae, Ascomycota lichenisati) in northern Poland [Pirminiai Cladonia chlorophaea grupės (Cladoniaceae, Ascomycota lichenisati) tyrimai šiaurės Lenkijoje]. – Botanica Lithuanica, 9(2): 135–143

Results of the preliminary studies on the Cladonia chlorophaea group in northern Poland are presented. Formerly only six taxa were recorded, five taxa have been confirmed and one (C. pocillum) is excluded. Currently there are nine taxa: C. chlorophaea, C. cryptochlorophaea, C. fimbriata, C. grayi, C. humilis var. humilis and var. bourgeanica, C. merochlorophaea, C. novochlorophaea, and C. pyxidata. The majority of taxa are widely distributed in inland as well as in coastal areas. Still, C. cryptochlorophaea is known only from coastal sites, except one inland locality. C. humilis var. humilis occurs only in the western part of the coastal northern Poland, whereas var. bourgeanica is known only from two inland localities. However, these taxa are known from few specimens only. Habitat requirements are also briefly noted.

Keywords: Cladonia chlorophaea group, lichen distribution, lichen ecology, Poland.