A taxonomic revision of some American Crepidotus

A taxonomic revision of some Crepidotus species described from North and South America is presented. A reexamination of 24 collections, including type and authentic specimens, provided the data for evaluating and comparing their morphological characters. The North American Crepidotus fusisporus with five of its varieties is interpreted as a single taxon. However, C. fusisporus var. longicystis is confirmed to be distinct. In addition, C. citri, C. levisporus, C. sublevisporus and C, yungicola were found conspecific with C. albidus, originally described from the northeastern United States. New collections of this latter species are reported from Mexico. Descriptions of the microscopical features, illustrations and discussions are provided.