Retiboletus griseus (“Gray Bolete”)

Dark brown bug holes w/bright yellow stains. White flesh may slowly redden. White-gray stem gets yellow tones by base, & has yellow-brown netting that darkens w/age.

SKU: Boletus griseus Categories: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,

Description

Name in North American Boletes: Boletus griseus

Genus: Retiboleteus

  • Genus 2: Boletus
  • Genus 3: Xercomus

Species: griseus

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.”

Edibility: Good.

CHEMICAL TESTS:

  • NH4OH (Ammonia): No data.
  • KOH: No data.
  • FeSO4 (Iron Salts): Cap flesh usually turns bluish gray.

Links:

National Audubon Society Field guide to Mushrooms, Gary Lincoff 570 Mushrooms of West Virginia and the Central Appalachians 302 North American Boletes 116 BENA 297

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