Butyriboletus peckii

Pale cap flesh w/red larval tunnels, blues slightly, & tastes sour or bitter. Yellow pores stain blue but resolve brown. Red & yellow netted stem. (Almost certainly a Caloboletus).

SKU: Boletus peckii Categories: 1. Cap Tastes Bitter, Acrid, Astringent, or Peppery, 1. Found in Connecticut, 2. Cap Tastes Sour or Acidic, 2. Found in Kansas, 2. Found in New Jersey, 3. Found in Michigan, 4. Found in Pennsylvania, 5. Found in North Carolina, 6. Found in Eastern Texas, 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 Blue, CAP SIZE FILTERS, CAP TASTE FILTERS, CAP TEXTURE FILTERS, Cap Texture is: 1- Dry & Smooth (Normal), Coniferous ("Needle-y") Trees, Deciduous (Leafy) Trees, Edibility: 2-Bitter, 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 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: 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, Spore Print is 2- Yellow to Yellow-Brown, Spore Print is 4- Plain Old Brown, STEM COLOR FILTERS, STEM DECORATION/ TEXTURE FILTERS, STEM SIZE FILTERS, Stem: 5- Is Netted (Reticulated), Stem: Netting is RED, ZONE 1- the NORTHEAST, ZONE 2- the MIDWEST, ZONE 5 - the SOUTH

Description
Discussions

Description

Name in North American Boletes: Boletus peckii

Genus: Butyriboletus

Genus 2: Boletus
Genus 3: Caloboletus

Species: peckii

Common Name:

Tells: Pale cap flesh w/red larval tunnels, blues slightly, & tastes sour or bitter. Yellow pores stain blue but resolve brown. Red & yellow netted stem. Very rare. (Almost certainly a Caloboletus).

Other Information: Red to brownish cap. An extraordinarily rare mushroom.

Science Notes: DNA testing moved this mushroom from Boletus to a newly erected genus called “Butyriboletus,” but see the discussion in the text and comments at Mushroom Observer #246697. Bottom line: this is a Caloboletus, not a Butyriboletus. The morphological arguments could not be clearer; we now know the 1963 sample was actually misidentified; and we even have forager-level DNA testing to confirm the point. Alas, but no one in the ivory tower has published a paper to make these points, and thus we are stuck with using the mistaken name until someone in authority gets around to fixing it. [Sigh]

Edibility: Unknown, but unlikely given the bitter taste.

CHEMICAL TESTS:

NH4OH (Ammonia): Cap surface turns deeper red (yellow in bleached areas) and then dingy gray-olive. Cap flesh turns yellowish, with greenish blue near the tubes.
KOH: Cap turns rusty red. Cap flesh turns bright orange.
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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