"Professor Gilbertson has provided not simply a listing of species on ponderosa pine, but also descriptions and line drawings which highlight diagnostic features of all the species included. . . . It should be on the shelves of every library referred to by forest mycologists and pathologists, and will be an undoubted aid to teachers and students of advanced mycology."--Mycologia"This publication is confidently recommended not only as an identification manual but also as the presentation of a major research project on fungal taxonomy, of which the author can be justly proud. It combines the usual high standards of accuracy with a clarity of illustration."--Kew Bulletin