Aureoboletus flaviporus

Viscid, cinnamon-brown cap. White to pink-buff cap flesh DNS & tastes acidic. Viscid stem is yellow on top, red-on-white below.

 

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Description

Name in North American Boletes: Boletus flaviporus

Genus: Aureoboletus

  • Genus 2: Boletus
  • Genus 3: Xercomus

Species: flaviporus

Common Name:

Tells: Viscid, cinnamon-brown cap. White to pink-buff cap flesh DNS & tastes acidic. Viscid stem is yellow on top, red-on-white below.

Other Information: Bright yellow pores age to green-yellow, DNS, & can form a pseudoreticulation at the stem top.

Science Notes: DNA testing moved this mushroom into the newly erected genus “Aureoboletus” (“Aureo” from the characteristic sunny-yellow pores).

Edibility: Good.

CHEMICAL TESTS:

  • NH4OH (Ammonia): Cap surface slowly turns orange. Cap flesh may slowly turn pale lavender, but not always.
  • KOH: Cap surface slowly turns orange.
  • FeSO4 (Iron Salts): Cap surface slowly turns pale greenish yellow. Cap flesh slowly turns pale grayish olive.

Links:

National Audubon Society Field guide to Mushrooms, Gary Lincoff  0 Mushrooms of West Virginia and the Central Appalachians  0 North American Boletes 112

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