About Butyriboletus brunneus (Peck) D.Arora & J.L.Frank
Butyriboletus brunneus (Peck) D.Arora & J.L.Frank is a pored mushroom belonging to the family Boletaceae. It is a North American species, originally published by Charles Horton Peck in 1890 under the name of a variety of Boletus speciosus.