The fifth issue of this series comprises extended keys for the determination of 148 species of Ectomycorrhizae (Abies 1, Betula 17, Carpinus 1, Fagus 31, Larix 10, Picea 51, Pinus 33, Pseudotsuga 4, and Quercus 2). The glossary, synoptic tables, literature as well as proposals for the arrangement of the plates are updated. Volume 5 comprises 16 plates of ectomycorrhiza with photo in colour, half tone photographs showing diagnostic details, and extensive legends. This series is an excellent piece of work and recommended to all working with ectomycorrhizae.