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Species of the fungus Nectria and their conidial states are plant pathogens or are saprophytes on a wide variety of substrates.They have brightly colored, stromatic or nonstromatic perithecia, unitunicate asci and bicellular ascospores. This genus is cosmopolitan but exhibits its greatest numbers and diversity at tropical latitudes. The volume - a treatment of those species of Nectria formerly placed in subgenus Hyphonectria - includes descriptions, keys, line drawings, and information on species habitats.
Gary J. Samuels (born 1944) is a mycologist and authority on the taxonomy of the Hypocrealean fungi. He was born in Grove City, PA and obtained his B.Sc. (1966) in botany at the Pennsylvania State University and M.A. (1968) and Ph.D. (1971) in biology at Columbia University. During his graduate education he held a fellowship at the New York Botanical Garden. He studied under Clark T. Rogerson and completed a dissertation on the taxonomy of the genus Nectriopsis. In 1973 Dr. Samuels joined the New Zealand Department of Scientific and Industrial Research, Plant Diseases Division and continued his studies of the Hypocreales. He became a Research Associate of the NYBG in 1985. Dr. Samuels has conducted extensive fieldwork in South America and New Zealand and has compiled An Annotated Index to the Mycological Writings of Franz Petrak. He is currently employed as a research botanist by the USDA Agriculture Research Service (Systematic Botanical and Mycological Laboratory) in Beltsville, Maryland where he has conducted research on the Hypocrea schweinitzii complex, phylogenetic analysis of ascomycetes, and the genus Trichoderma as a biological control agent. Gary Samuels's Author Page