Name in North American Boletes: Boletus griseus
- Genus 2: Boletus
- Genus 3: Xercomus
Common Name: “Gray Bolete”
Tells: Dark brown bug holes w/bright yellow stains. White flesh may slowly redden. White-gray stem w/yellow-brown netting that darkens w/age. Gray (pale, brownish or dark) cap.
Other Information: Has an unfortunate tendency to be bug-infested, which makes the yellow-stained holes in the stem flesh a key tell. Cap may develop yellow-brownish tints w/age, and stem may develop yellow tones by base or reddish stains anywhere. Pores usually DNS but may bruise gray or brown. Likes oak. A pine-loving Japanese version (griseus var. fuscus) has also been found in various Eastern states.
Science Notes: DNA testing moved this mushroom into the newly erected genus “Retiboletus.”
- NH4OH (Ammonia): No data.
- KOH: No data.
- FeSO4 (Iron Salts): Cap flesh usually turns bluish gray.