Introduction: Ascomycete Systematics in the Nineties; D.L. Hawksworth, J. Mouchacca. Ascoma and Thallus Structure and Ontogeny: Ascoma Structure and Ontogeny in Ascomycete Systematics; M.A. Letrouit-Galinou, et al. Condiomata and Mitosporic States: Unitary Parameters in Conidiogenesis; G.L. Hennebert, B.C. Sutton. Ultrastructure: Septal Ultrastructure and Ascomycete Systematics; J.W. Kimbrough. Secondary Chemistry: Secondary Metabolites of Some Nonlichenized Ascomycetes; P.G. Mantle. Paleomycology, Cladistics, and Biogeography: The Fossil History of Ascomycetes; T.N. Taylor. Molecular Systematics: Molecular Evolution of Ascomycete Fungi: Phylogeny and Conflict; J.W. Taylor, et al. Biology and Species Concepts: Evolutionary Processes Affecting Adaptation to Saprotrophic Life Styles; A.D.M. Rayner. Problems and Perspectives. Outline of the Ascomycetes. 37 additional articles. Appendix. Index.