Polish Glomales

The morphological features of spores of Glomus pustulatum found in Poland are described and illustrated, and the worldwide occurrence of this species is characterized. Spores of G. pustulatum from Poland do not differ from those originally found in Canada and the United States of America. They were found in only one of more than 300 soil samples taken from over 100 localities in Poland. G. pustulatum was associated with roots of Ammophila arenaria colonizing maritime sand dunes of the Slowinski National Park, with a mean spore density of 12 in 100?g dry soil. Associated species of G. pustulatum were Acaulospora dilatata and Scutellospora dipurpurascens. G. pustulatum was found in Poland for the first time and is probably a species new to Europe.