June to October
Caloboletus radicans
Caloboletus radicans
Toxic
- Raw
- Do not eat raw
- Cooking
- No safety preparation validated
- Review
- Do not consume
- Instruction
- Never eat this species. MycoRadar does not endorse any treatment to make it safe.
A large, pale and bitter bolete with yellow pores that turn blue, a stout yellow stem and a distinctly tapered, root-like base.
View current conditions on the map
Guide contents
Guide contents
Season
Indicative period: June to October.
Habitat
Woodland and parks beneath broadleaf trees, especially oaks and beeches, in warm areas with base-rich soil.
Method
Check several visible features before retaining a species name.
Three features to check on the specimen.
Cap
Convex, grey-beige to grey-brown, often uneven.
Pores
Yellow, then olive-yellow pores that turn distinctly blue when pressed.
Stem and flesh
Stout yellow stem, sometimes finely reticulate near the top, ending in a tapered, rooting base. Pale yellow flesh that turns intensely blue when cut.
Examine the specimen in this order.
- Examine the underside and the stem all the way to its base.
- Compare the flesh reaction only on a section already needed for examination.
- Keep the host tree and habitat as supporting evidence.
Features incompatible with this species.
- Caloboletus calopus, with a stem that is extensively red.
- Rubroboletus satanas, with red pores at maturity.
- Boletus edulis, without blue staining or a rooting base.
