Expansion of the genus in North America to include , sp. nov., and , comb. nov.

is a small genus of Boletaceae found primarily in the Northern Hemisphere characterized by the light to dark brown hymenophore that stains blue. In Florida, specimens of were collected that resembled , a species known primarily from northeastern North America and Europe. Five nuclear loci of these Florida specimens were sequenced and phylogenetically analyzed. A nuc rDNA internal transcribed spacer ITS1-5.8S-ITS2 (ITS) phylogeny of was generated using primarily uncultured environmental sequences to confirm ectomycorrhizal associations. Based on morphological and molecular data, we describe a new species, . Results from these analyses also support the new combination . A lectotype of is also established from Charles H. Peck's original material. We discuss the distinguishing characters and species of found in North America and provide a key to the known worldwide species of .