ABSTRACT
As every chapter in this book demonstrates, species of fungi have been selected for investigation on the basis of distinctive features: The mode of their growth, their morphology, the places in which they grow, in the method of their reproduction, or in their response to environment. No single species has all the desirable features for research, and species or strains were selected for particular types of investigations. Indeed the research problem itself got deœned by some special feature of the fungus or strain of a fungus. Table 15.1 gives the terms used to denote the extant diversity. The diversity comprises both the variations between the species (interspecies variations) as well as within the species (intraspecies variation).
