Observation 103949: Xerocomus tenax Nuhn & Halling
When: 2012-08-05
No herbarium specimen

Notes: The mushrooms are from 3 separate collection scattered under old oaks. Note the variability in the color of the stipe and color/intesity/mesh size of reticulation. All mushroom had a tough stipe tips.

Images

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Taken immediately after sectioning
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Taken ~7 min after sectioning — note the bluing right above the tubes
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Staining with ammonia = left half; staining with 3% KOH = right half
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The cap diameter of this specimen was 13 cm
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Proposed Names

76% (2)
Recognized by sight: Coarse red-brown reticulation on a whitish stipe; “woody” stipe base
Used references: “North American Boletes” by Bessette-Roody-Bessette
Based on chemical features: NH4OH on cap = gree-blue, resolving brownish; KOH on cap = deep red-brown
28% (1)
Recognized by sight: According to Michael Kuo, B. illudens could be morphologically inseparable from B. tennax
Used references: MushroomExpert.com
85% (1)
Eye3 Eyes3
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Provacative pairing …
By: Dave W (Dave W)
2012-08-06 06:41:26 PDT (-0700)

of one specimen that appears to be a bullseye ID for B. tenax, along with several other more ambiguous specimens. Chemical tests reported for B. tenax and B. illudens appear to be similar… depending upon how much difference one perceives between the colors brown and fuscous.

Created: 2012-08-05 15:29:18 PDT (-0700)
Last modified: 2015-09-16 22:47:01 PDT (-0700)
Viewed: 168 times, last viewed: 2016-10-20 18:19:34 PDT (-0700)
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