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...some boletes, earthballs, puffballs, and false truffles. Most members are saprobic, 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.
Truffles are rare in North America, being found most often in Oregon and California. False truffles (genus Rhizopogon, order Boletales, phylum Basidiomycota) form small, underground, potato-like structures under coniferous trees in parts of North America.
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