Boletus subcaerulescens (“Almost Bluing King Bolete”)

Stem has white netting white, darkening lower down & from handling. Reddish-brown, oft-wrinkled cap. Creamy pores age to yellow & may stain blue-gray that turns brownish.

SKU: Boletus subcaerulescens Categories: 1. Found in Connecticut, 2. Found in New Jersey, 3. Cap Tastes Nutty or Sweet, 3. Found in Michigan, 3. Found on Long Island (New York), 4. Found in Ohio, 4. Found in Pennsylvania, 4a. Found in S.W. Pennsylvania, 5. Found in W. Va. or the Central Appalachians, 6. Found in Quebec, CAP COLOR FILTERS, CAP FLESH COLOR FILTERS, Cap Flesh Does Not Stain with 30 seconds, Cap Flesh is White, CAP FLESH STAINING FILTERS, CAP SIZE FILTERS, CAP TASTE FILTERS, CAP TEXTURE FILTERS, Cap Texture is: 1- Dry & Smooth (Normal), Cap Texture is: 3- Wrinkled, Pitted or Corrugated, Coniferous ("Needle-y") Trees, Edibility: 5- Choice, FILTER SET #1: REGION, FILTER SET #2: CAP FEATURES, FILTER SET #3: PORE FEATURES, FILTER SET #4: STEM FEATURES, FILTER SET #5: CAP FLESH (CONTEXT) FEATURES, FILTER SET #6: SPORE PRINT, FILTER SET #7: HABITAT FILTERS, FILTER SET #8: EDIBILITY, My Mushroom is Mature & Its Pores are Tiny, My Mushroom's Cap is >0.1" Across, My Mushroom's Cap is >4” Across, My Mushroom's Cap is >6” Across, PORE COLOR FILTERS, PORE SIZE FILTERS, PORE STAINING FILTERS, Pores Do Not Stain within 30 seconds, Pores Stain Blue, Pores Stain Other than Blue, Primary Cap Color is: 3- Red, Pink, Purple, or Orange, Primary Cap Color is: 4- Some Shade of Brown, Primary Pore Color is: 1- White, Buff, or Light Gray, Primary Pore Color is: 2 - Yellow to Gold, Primary Pore Color is: 4 - Some Shade of Brown, Primary Stem Color is: 2- Yellow to Orange, Primary Stem Color is: 3- Red, Pink, Purple, or Orange, Primary Stem Color is: 4- Some Shade of Brown, Spore Print is 1- Olive to Olive-Brown, Spore Print is 4- Plain Old Brown, STEM COLOR FILTERS, STEM DECORATION/ TEXTURE FILTERS, Stem Is Bulbous, STEM SIZE FILTERS, Stem: 5- Is Netted (Reticulated), Stem: Netting is WHITE, ZONE 1- the NORTHEAST, ZONE 2- the MIDWEST

Description
Discussions(2)

Description

Genus: Boletus

Species: subcaerulescens

Species 2: aurantioruber

Common Name: “Almost Bluing King Bolete”

Tells: Stem has white netting white, darkening lower down & from handling. Reddish-brown, oft-wrinkled cap. Creamy pores age to yellow & may stain blue-gray that turns brownish.

Other Information: White cap flesh can have a reddish-brown zone near the cap skin and/or the tubes, & often has a pleasant smell (lemony) and/or taste (nutty-sweet). Prefers spruce. White mycelium. Note that the bluing is not a reliable feature, and thus should be used more for final confirmation than an effort to narrow things down.

Science Notes: 2022 Whole genome testing has merged B. aurantioruber into B. subcaerulescens.

Edibility: Choice, with no question about it.

CHEMICAL TESTS:

NH4OH (Ammonia): Cap skin turns bluish green, then bright orange with a dull gray-green perimeter, then yellow-orange. Cap flesh does not react.
KOH: Cap skin turns amber-orange. Cap flesh does not react.
FeSO4 (Iron Salts): Cap skin does not react. Cap flesh turns pale greenish.

Links:

National Audubon Society Field guide to Mushrooms, Gary Lincoff

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Mushrooms of West Virginia and the Central Appalachians

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North American Boletes

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amronè

2 years 8 months ago

I found 2 Boletes that turned a dark blue when I cut the stems off for Spore printing. Are these EDIBLE? New to this. Open minded. Thanks

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amronè

2 years 8 months ago

Mid west US which other boletes stain dark blue?

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