The theory of pattern formation, assumed to be applicable to all multicellular organisms, has been developed largely through the study of animal, and to a lesser extent, plant systems. Fungi, members of the third major kingdom of eukaryotes, have not been featured in these studies, although much research of fungal morphology has been undertaken with taxonomic intentions. This first account of the developmental biology of fungal morphogenesis considers whether evidence exists for the action of pattern-forming mechanisms in the development of fungal structures. Chapters on the fruit body, on a range of aspects of the hyphae and the mycelium, and on genetic control and nuclear events in morphogenesis provide new insights into the mechanisms used in fungal development.