About Boletus subcaerulescens (E.A.Dick & Snell) Both, Bessette & A.R.Bessette
Boletus subcaerulescens is a basidiomycete fungus belonging to the genus Boletus, and it is found in northeastern North America. Its fruiting bodies grow in association with pine and spruce trees. The cap can reach up to 18 cm wide, ranges in shape from convex to flat, and is brown in color. The fungus has yellow tubes that stain blue when bruised, eventually turning brown later. Its flesh is white to buff in color and does not change color when cut. The stem is brown, matching the color of the cap, and has a light-colored reticulate texture. The specific epithet of this species comes from Latin: it combines the prefix sub-, the word caeruleus, and the suffix -escens, which literally translates to "becoming dark blue beneath". Phylogenetic analysis has confirmed that B. subcaerulescens is a member of a closely related clade (group of related organisms) that also includes B. pinophilus, B. regineus, B. rex-veris, B. fibrillosus, and Gastroboletus subalpinus.
