Butyriboletus billieae (“Billie’s Bolete”)

Description

Name in North American Boletes: N/A

Genus: Butyriboletus

• Genus 2: Boletus. Multigene DNA testing in 2019 and the overall gestalt are strong enough to move the species into Butyriboletus for our purposes, but those DNA results have not been formally published and authoritative works like Boletes of Eastern North America still have the species listed under Boletus.

Species: billieae

Common Name: “Billie’s Bolete” (after the wife of Dr. Ernst E. Both)

Tells: Chocolate- to purplish-brown cap. Red stem (especially low) with yellow reticulation. Pale yellow flesh stains slowly blue. Uncommon to rare.

Other Information: Odor described as “reminiscent of chocolate chip cookies when dried!” Cap bruises reddish. Yellow pores age greenish on their way toward olive, and quickly bruise blue. Stem is deep red at the bottom, but may get yellower going up. Likes sandy soil. White mycelium.

Science Notes:

Edibility: Unknown.

CHEMICAL TESTS:

• NH4OH (Ammonia): Cap surface turns amber.
• KOH: Cap surface turns dark amber before fading to red brown.
• FeSO4 (Iron Salts): Cap surface turns grayish green.

Links:

• Mushroom Expert
• Mushroom Observer
• Wikipedia
• Google Image Search

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