- Boletus strobilaceus Scop.
- Boletus cinereus Pers.
- Boletus floccopus Pers.
- Boletus strobiliformis Vill.
- Strobilomyces floccopus (Vahl) P.Karst.
Old Man of the Woods
Value of species
It is native to Europe and North America. Fruit bodies are characterized by very soft dark grey to black pyramidal and overlapping scales on the cap surface.
Strobilomyces strobilaceus is found solitary or in groups in deciduous as well as coniferous forests in low mountain ranges and alpine areas of Europe, North America and Asia (Iran and Taiwan). It is less common in lowlands. The fungus appears between August and October and young specimens are edible.
The caps of the fruit bodies are between 4 to 10 cm (1.6 to 3.9 in) wide, with a convex shape and a villous, involute margin. The cap surface is covered with dark grey to black erect scales. The stipe is up to 14 cm (5.5 in) long and 2 cm (0.8 in) thick. It is coloured like the cap and has a woolly surface and a thick, ascending annulus. The pores on the underside of the cap are hexagonal, coloured dirty white or grey. The flesh is thick and initially white, but will stain pink and then slate grey and black after exposure to the air. The taste of the mushroom is indistinct, with a slight earthiness.
The dark brown to black spores are 9–15 by 8–12 μm, short elliptic and are covered with a mesh-like ornament.