Identification of species of the Armillaria (Fr.: Fr.) Staude genus in Poland.
Studies were undertaken on the identification of Armillaria spp. in Poland using mating tests, macroscopic and microscopic features of fruit bodies, and some phenological traits. Five intersterile biological groups were identified, which corresponded to 5 species: intersterile group A, A. borealis; intersterile group B, A. cepistipes; intersterile group C, A. ostoyae [A. obscura]; intersterile group D, A. mellea; and intersterile group E, A. gallica.