From a mycological viewpoint the diversity of Indonesian mushrooms is barely known. Some visiting mycologists and plant pathologists have studied the Indonesian mycota since 1844, but only about 1400 specimens collected from the many areas of Indonesia are now present in the Herbarium Bogoriense (BO). Moreover, very little information about the taxa they represent is available because of the poor descriptions of basidiome morphology, micromorphology, and ecology. They are hardly adequate specimens for mycological research. There were several reasons which have caused this paucity in the research of fungal taxonomy: 1) lack of inventory; 2) absence of human resources; 3) too few collections.