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The Bolete Filter Triage (A Synoptic Key) for North American Boletes

Xerocomus tenax

Big, broad, brown reticulation on a stem that is whitish but may tinge yellow, and is often woody at the base. Flesh stains reddish purple. Pores DNS or stain slightly red. Tastes sour.

SKU: Boletus tenax Categories: 1. Found in Connecticut, 1. Found in Northern Illinois, 2. Cap Tastes Sour or Acidic, 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, 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 is Yellow, CAP FLESH STAINING FILTERS, Cap Flesh Stains a Color Other than Blue, CAP SIZE FILTERS, CAP TASTE FILTERS, CAP TEXTURE FILTERS, Cap Texture is: 1- Dry & Smooth (Normal), Cap Texture is: 3- Wrinkled, Pitted or Corrugated, Cap Texture is: 4- Cracked Beyond Environmental Effects, Coniferous ("Needle-y") Trees, Deciduous (Leafy) Trees, Edibility: 3- Iffy, 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 >.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, 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: 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 1- Olive to Olive-Brown, Spore Print is 4- Plain Old Brown, STEM COLOR FILTERS, STEM DECORATION/ TEXTURE FILTERS, STEM SIZE FILTERS, Stem: 4- Has Ridges, Stem: 5- Is Netted (Reticulated), Stem: Netting is WHITE, ZONE 1- the NORTHEAST, ZONE 2- the MIDWEST, ZONE 5 - the SOUTH

Description
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Description

Name in North American Boletes: Boletus tenax

Genus: Xerocomus

Genus 2: Boletus

Species: tenax

Common Name:

Tells: Stem whitish (may tinge yellow) w/ broad, brown netting & often-“woody” base. Flesh slowly stains red-purple. Pores DNS or stain slightly red. Tastes sour.

Other Information: Likes oak & pine. Reddish-brown cap tends to crack by the edges & gets ever more uneven w/age. Xer. illudens is very similar but usually has netting that goes only partway down the stem, and usually lacks the tapered & woody stem base.

Science Notes: DNA testing moved this mushroom into the newly erected genus “Xerocomus.”

Edibility: The books still say “unknown” but your author has eaten and enjoyed it, and both the lookalike Xer. illudens and the almost-lookalike Xer. ferrugineus are considered “good.” The chances approach zero that no one has eaten tenax while believing it was one of those.

CHEMICAL TESTS:

NH4OH (Ammonia): Cap skin turns green, then blue, and then brownish gray.
KOH: Cap skin turns brownish gray.
FeSO4 (Iron Salts): No data.

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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BENA

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