Retiboletus griseusRetiboletus griseus, commonly known as the gray bolete, is a species of bolete fungus in the family Boletaceae.TaxonomyThe species was first described scientifically in 1878 by American botanist Charles [Christopher Frost]. It was transferred to Retiboletus in 2002.DescriptionThe grayish cap is convex, wide, and soft or leathery. The stem is yellowish, 4–10 cm tall and thick. The flesh is whitish and can stain tannish. The spore print is olive brown.Similar speciesLookalikes include R. vinaceipes, Tylopilus griseocarneus, T. variobrunneus, and Leccinum albellum.Habitat and distributionRetiboletus griseus can be found under oak trees in eastern North America from June to September.UsesThe species is edible but often infested with worms.