Retiboletus griseus, commonly known as the gray bolete, is a species of bolete fungus in the family Boletaceae.
The species was first described scientifically in 1878 by American botanist Charles Christopher Frost. It was transferred to Retiboletus in 2002.
The grayish cap is convex, wide, and soft or leathery. The stem is yellowish, 4âÂÂ10 cm tall and thick. The flesh is whitish and can stain tannish. The spore print is olive brown.
Lookalikes include R. vinaceipes, Tylopilus griseocarneus, T. variobrunneus, and Leccinum albellum.
Retiboletus griseus can be found under oak trees in eastern North America from June to September.
The species is edible but often infested with worms.