Boletus miniato-olivaceus

Rosy pink-red cap tans w/age, often w/olive patches. Yellow pores stain blue-that-browns, add red w/age & end dingy olive. Stem tapers down to yellow mycelium.

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SKU: Boletus miniato-olivaceus Categories: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,

Description

Genus: Boletus

Species: miniato-olivaceus

Tells: Rosy pink-red cap tans w/age, often w/olive patches. Yellow pores stain blue-that-browns, add red w/age & end dingy olive. Stem tapers down to yellow mycelium.

Other Information: White to pale yellow cap flesh has a thin red layer under the cap skin, & stains blue (sometimes slowly). Yellow stem that often has red or brown striations & other markings high up. According to North American Boletes this mushroom has an association with beech, but several experts in the Northeast have reported an association with hemlock and noted that it is particularly common in woods where hemlock and beech occur together. Chemical tests help the ID.

Edibility: Avoid. Several people have reportedly gotten ill.

CHEMICAL TESTS:

  • NH4OH (Ammonia): Cap surface turns orange/yellow to amber/brown, often with a bluish ring. Cap flesh has no reaction.
  • KOH: Cap surface flashes olive-yellow, then rapidly turns olive-green or olive-bronze. Cap flesh turns pale orange.
  • FeSO4 (Iron Salts): Cap surface turns grayish olive. Cap flesh turns pale yellowish.

Links:

National Audubon Society Field guide to Mushrooms, Gary Lincoff 0 Mushrooms of West Virginia and the Central Appalachians 0 North American Boletes 129 117

Got something to discuss?


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Reo lawley
3 months 18 days ago

I think i found this in Orange county California

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Scott Pavelle
2 months 11 days ago

Sorry to take so long getting back to you. Have you got a photo, or an authoritative ID? Mini-O is notoriously hard to get right even in the regions where we know that it grows. What trees did you find it under, and what makes you think it was this particular mushroom instead of a lookalike?

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Junior
1 month 18 days ago

I found this species in Naples, Florida while readying another patch of land for an outdoor mycelium patch. It wasnt near any plants, it was at the foot of a hill behind my pool. There has been a lot of rain lately especially early in the day the past few weeks.

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Scott Pavelle
1 month 18 days ago

Nice. Is there something you want me to share about it that would help other people with their ID’s?