Xerocomellus atropurpureus

Gray- to brown-black cap often has a red-tinted edge, & is very wrinkled when young. Yellow stem covered w/abundant red or red-brown spots.

SKU: Boletus zelleri-1 Categories: 1. Found in the Pacific Northwest, 2. Found in California, 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), Cap Texture is: 3- Wrinkled, Pitted or Corrugated, Cap Texture is: 4- Cracked Beyond Environmental Effects, Coniferous ("Needle-y") 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'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, Pores Stain Blue, Primary Cap Color is: 4- Some Shade of Brown, Primary Cap Color is: 5- Black, Dark Brown, or Dark Gray, Primary Pore Color is: 2 - Yellow to Gold, 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 SIZE FILTERS, Stem: 7- Is Notably Dotted and/or Spotted, ZONE 3- the FAR WEST, ZONE 4 - the SOUTHWEST

Description
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Description

Name in North American Boletes: Boletus zelleri

Genus: Xerocomellus

Species: atropurpureus

Common Name:

Tells: Gray- to brown-black cap often has a red-tinted edge, & is very wrinkled when young. Yellow stem covered w/abundant red or red-brown spots.

Other Information: Dark yellow pores stain blue, often slowly. May grow on the ground or on decaying wood. All but indistinguishable in the field from X. zelleri, the main differences are region (zelleri rarely reaches down into California), the cap on youngsters (heavily wrinkled vs. the velvet on zelleri, which does not happen at all with atropurpureus), more purplish tones in the cap color vs. the darker olive/black in zelleri, and being a bit stouter overall than zelleri. This species also has a more uniform cap color, while zelleri typically has a pale margin by the edge.

Science Notes: DNA testing split this gorgeous mushroom off from the lookalike species X. zelleri.

Edibility: Good.

CHEMICAL TESTS:

NH4OH (Ammonia): Cap skin and flesh have no reaction.
KOH: Cap skin may turn grayish (or not). Flesh turns dark yellow to orangey.
FeSO4 (Iron Salts): Cap skin and flesh have no reaction.

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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