Butyriboletus brunneus

Brown (reddish, yellow, or olive) cap. Yellow pores & pale yellow flesh blue quickly. Well-netted stem yellow above & pink to purple by base. Early season.

SKU: Boletus speciosus var. brunneus Categories: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,

Description

Name in North American Boletes: Boletus speciosus var. brunneus

Genus: Butyriboletus

  • Genus 2: Boletus
  • Genus 3: Xercomus

Species: brunneus

  • Species 2: speciosus var. brunneus

Common Name:

Tells: Brown (reddish, yellow, or olive) cap. Yellow pores & pale yellow flesh blue quickly. Well-netted stem yellow above & pink to purple by base. Early season.

Other Information: Likes hemlock.

Science Notes: DNA testing moved this mushroom from Boletus to a newly erected genus called “Butyriboletus” (“butyri” being latin for “butter” and this being one of the Butter Boletes).

Edibility: Good.

CHEMICAL TESTS:

  • NH4OH (Ammonia): Cap skin turns amber-orange to orange. Cap flesh does not react.
  • KOH: Cap skin and flesh both turn amber-orange to orange.
  • FeSO4 (Iron Salts): No data.

Links:

National Audubon Society Field guide to Mushrooms, Gary Lincoff 0 Mushrooms of West Virginia and the Central Appalachians 306 North American Boletes 160 181

 

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