Phoma is a genus of fungi within the Coelomycetes. These fungi are commonly and frequently recovered in culture from all ecological situations, but are very difficult to identify. There has been a great need for a practical manual to aid such identification, and this book will fill that gap. It provides line drawings and keys for the identification of common pathogenic and saprotrophic species of Phoma in vitro, with references to additional diagnostic literature and documentation of the numerous synonyms formerly used in the phytopathological literature.