Abstract
In the present paper the results of earlier studies on mycogenous fungi which were gathered occasionally are summarized. Fifieen specres. previously Pyrenomycetes s.l., have been found growing on other fungi Immothia hypoxylon and Lophiostoma polyporicola are new species to the Polish mycoflora. Sphaeronaemella Kulczyńskiana described by K. R o u p p e r t (1912) is considered to be Eleuteromyces subultus. Relatively high number of fungi inhabiting stromata of Diatrypella favacea is probably connected with its early colonization of the Polish area.