Cenococcum graniforme in Poland

During the field investigations 72 localities of <i>Cenococcum graniforme</i> (Sów.) Ferd. et Winge, mostly in central Poland were stated. At more than 50% of places sclerotia of <i>C. graniforme</i> were found together with carpophores of <i>Elaphomyces granulatus</i> Fr. and/or <i>E. muricatus</i> Fr. Before present investigations <i>C. graniforme</i> was known in Poland only as a fossil fungus and as an ectomycorrhizal partner of some trees. Now <i>C. graniforme</i> seems to be a common fungus in Poland. The maps of its distribution, according to the actually known localities are presented in this paper. The names of localities in Poland are listed on pages 35-38. Besides Poland, the author found <i>C. graniforme</i> in England, Austria and East Germany.