The Proteaceae represent one of the Southern Hemisphere's most prominent flowering plant families, the cultivation of which forms the basis of a thriving export industry. Diseases cause a loss in yield and also limit the export of these flowers due to strict phytosanitary regulations. In this publication the fungi that cause leaf, stem and root diseases on Leucadendron, Leucospermum and Protea are treated. Data are provided pertaining to the taxonomy, identification, host range, distribution, pathogenicity and control of these pathogens. Taxonomic descriptions and illustrations are provided and keys are included. Disease symptoms are illustrated with colour photographs.