Gyroporus f/k/a castaneus (“Chestnut Bolete”)

Stem stuffed with “cotton” & hollow when old. Flesh is hard and brittle. Brown cap edges often split & flare w/age.

SKU: Gyroporus castaneus Categories: 1. Found in Connecticut, 1. Found in Northern Illinois, 1. Found in the Pacific Northwest, 2. Found in Florida, 2. Found in Kansas, 2. Found in New Jersey, 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 North Carolina, 5. Found in Ontario, 5. Found in W. Va. or the Central Appalachians, 6. Found in Eastern Texas, 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), Coniferous ("Needle-y") Trees, Deciduous (Leafy) Trees, Edibility: 4- Good, 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, PORE COLOR FILTERS, PORE SIZE FILTERS, PORE STAINING FILTERS, Pores Do Not Stain within 30 seconds, Primary Cap Color is: 2- Yellow to 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 Stem Color is: 1- White, Buff, or Light Gray, Primary Stem Color is: 2- Yellow to Orange, Primary Stem Color is: 4- Some Shade of Brown, Spore Print is 2- Yellow to Yellow-Brown, STEM COLOR FILTERS, STEM DECORATION/ TEXTURE FILTERS, Stem Is Bulbous, Stem: 1- Has No Significant Ornaments, ZONE 1- the NORTHEAST, ZONE 2- the MIDWEST, ZONE 3- the FAR WEST, ZONE 4 - the SOUTHWEST, ZONE 5 - the SOUTH

Description
Discussions(3)

Description

Genus: Gyroporus

Species: borealis (North) or smithii (South)

Species (Old): castaneus

Common Name: “Chestnut Bolete”

Tells: Stem stuffed with “cotton” & hollow when old. Flesh is hard and brittle. Brown cap edges often split & flare w/age.

Other Information: DNA testing tells us the U.S. has two lookalike species, borealis in the north and smithii in the south. The two are indistinguishable for practical purposes.

Science Notes: DNA evidence has divided the classic European species (G. castaneus) away from its American counterpart, which has itself been divided into versions: G. borealis (which grows in northern regions) and G. smithii (which grows to the south). There is, of course, a massive area of overlap where both species grow.

Edibility: Choice to most, good to the rest.

CHEMICAL TESTS:

NH4OH (Ammonia): Cap skin turns amber-orange. Cap flesh may turn pale brown, but not reliably.
KOH: Cap skin may be negative or may turn yellow before fading to white. Cap flesh may turn pale brown, but not reliably.
FeSO4 (Iron Salts): Cap skin does not react. Cap flesh may turn pale brown, but not reliably.

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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Tyler

6 years 3 months ago

I do believe this mushroom is found on Long Island, NY. I have eaten them from my lawn, and also seen them on the edges of Oak and Beech forests here on the South Fork. They are delicious.

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Scott Pavelle

6 years 3 months ago

I just checked and it is now listed in the Long Island Mycological Club records. The change has been made. Thanks for the heads-up.

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Sammy

4 years 6 months ago

Found in Louisiana as well

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