Retiboletus griseus

Retiboletus griseus, commonly known as the gray bolete, is a species of bolete fungus in the family Boletaceae.

Retiboletus griseus
Scientific classification
Kingdom:	Fungi
Division:	Basidiomycota
Class:	Agaricomycetes
Order:	Boletales
Family:	Boletaceae
Genus:	Retiboletus
Species:	R. griseus
Binomial name
Retiboletus griseus (Frost) Manfr. Binder & Bresinsky (2002)
Synonyms[1]
Boletus griseus Frost (1878) Ceriomyces griseus (Frost) Murrill (1909) Xerocomus griseus (Frost) Singer (1942) Tubiporus griseus (Frost) S.Imai (1968)

Retiboletus griseus[2]
Mycological characteristics
	Pores on hymenium
	Cap is convex
	Spore print is yellow-brown
	Ecology is mycorrhizal
	Edibility is edible

Taxonomy

The species was first described scientifically in 1878 by American botanist Charles Christopher Frost.^[3] It was transferred to Retiboletus in 2002.^[4]

Description

The grayish cap is convex, 4–10 centimetres (1+1⁄2–4 in) wide, and soft or leathery.^[5] The stem is yellowish, 4–10 cm tall and 1–3 cm (1⁄2–1+1⁄4 in) thick.^[5] The flesh is whitish and can stain tannish. The spore print is olive brown.^[5]

Similar species

Lookalikes include R. vinaceipes, Tylopilus griseocarneus, T. variobrunneus, and Leccinum albellum.^[5]

Habitat and distribution

Retiboletus griseus can be found under oak trees in eastern North America from June to September.^[5]

Uses

The species is edible but often infested with worms.^[6]