About Rubroboletus lupinus (Fr.) Costanzo, Gelardi, Simonini & Vizzini
Rubroboletus lupinus, commonly known as the wolf bolete, is a bolete fungus belonging to the genus Rubroboletus. Elias Magnus Fries originally formally described this species in 1838, when it was classified as a species of the genus Boletus. It was transferred to the genus Rubroboletus in 2015. This genus was circumscribed to hold other related, reddish-colored, blue-staining bolete species that form a distinct clade. The species epithet lupinus comes from the Latin word lupus, which means wolf. Molecular studies have found that European populations of R. lupinus have considerable genetic variation, and confirm that the species falls into a clade that is sister to Rubroboletus dupainii. This fungus grows in warm broad-leaved forests, where it forms ectomycorrhizal associations with multiple species of oak (Quercus) and sweet chestnut (Castanea).
