Name in North American Boletes: Tylopilus nebulosus
- Genus 2: Tylopilus
- Genus 3: Boletus
Tells: Gray-to-brown cap stains darker & often cracks w/age. Yellow pores age to brown & then red-brown, staining blackish-brown.
Other Information: Whitish flesh stains red-brown, then darkens. Gray-to-brown stem often has a whitish base & sometimes a bit of netting.
Science Notes: DNA testing moved this mushroom into the newly erected genus “Porphyrellus.”
- NH4OH (Ammonia): Cap skin turns dull reddish to reddish-brown. Cap flesh turns dull yellow to yellow-orange.
- KOH: Cap skin turns dull reddish to reddish-brown. Cap flesh turns rusty orange.
- FeSO4 (Iron Salts): Cap skin has no reaction. Cap flesh turns bluish green to olive.