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Boletales, a diverse order of fungi in the class Agaricomycetes (phylum Basidiomycota, kingdom Fungi) that includes porcini, earthballs, certain puffballs, and false truffles. Most members are saprotrophic, primarily found on the wood of fallen trees or in the soil at the base of trees. Examples of genera are Rhizopogon (150 species widespread in North America) and Boletus.

The Editors of Encyclopaedia Britannica This article was most recently revised and updated by Melissa Petruzzello.