Xerocomus subtomentosus (“Yellow Crack Bolete”)

Olive- to yellow-brown cap often fissures & cracks w/age. Yellow stem has red-brown streaks, sometimes ridges, & often stains brownish from handling. Ammonia on cap turns red/brown.

SKU: Boletus subtomentosus Categories: 1. Found in Connecticut, 1. Found in Northern Illinois, 1. Found in the Pacific Northwest, 2. Found in California, 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 is Yellow, 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, Cap Texture is: 4- Cracked Beyond Environmental Effects, 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 Huge, 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: 2- Yellow to 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 Is Thin & Stringy, STEM SIZE FILTERS, Stem: 1- Has No Significant Ornaments, Stem: 4- Has Ridges, Stem: 5- Is Netted (Reticulated), ZONE 1- the NORTHEAST, ZONE 2- the MIDWEST, ZONE 3- the FAR WEST, ZONE 4 - the SOUTHWEST, ZONE 5 - the SOUTH

Description
Discussions

Description

Name in North American Boletes: Boletus subtomentosus

Genus: Xerocomus

Genus 2: Boletus

Species: subtomentosus

Common Name: “Yellow Crack Bolete”

Tells: Olive- to yellow-brown cap often fissures & cracks w/age. Yellow stem has red-brown streaks, sometimes ridges, & often stains brownish from handling. Ammonia on cap turns red/brown.

Other Information: Yellow pores dull w/ age & stain greenish to greenish-blue, often lightly and slowly.

Science Notes: North American Boletes lists a parallel species called var. perplexus. DNA tests have merged this back into the parent, along with moving the whole thing over to the newly erected genus “Xerocomus”. The var. perplexus cap was supposed to be a little lighter, with more consistent staining in the pores.

Edibility: Good.

CHEMICAL TESTS:

NH4OH (Ammonia): Cap skin instantly turns reddish brown.
KOH: No data in N.A.B. Per Dave Wasilewski in Pennsylvania, cap skin turns blackish brown & resolves to brown, while cap flesh turns grayish & then resolves to pale amber.
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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