Abstract
Based on selected taxa of Lycoperdales and Geastrales, phylogeny and delimitation of several gasteroid mushroom genera were investigated using RFLP and sequence analysis of 18S rDNA and ITS rDNA (ITS1-5.8S-ITS2). Support for an Agaricales-Lycoperdales relationship was found, the Geastrales being clearly separated from this lineage. Within the Lycoperdales, Lycoperdon was found to be polyphyletic, whereas Bovista appeared to be monophyletic.