Observation 73921: Boletus peckii Frost

When: 2011-08-13

Collection location: Bernardsville, New Jersey, USA [Click for map]

Who: I. G. Safonov (IGSafonov)

No specimen available

A single basidiocarp growing under oaks and other hardwoods. Though this bolete is lacking vivid tones, the brown cap nevertheless contrasts nicely with the dull purple-red reticulated stipe and pale beige-gray pore mouths. The context tastes somewhat bitter, but not anything like T. felleus or T. plumbeoviolaceus. This is the first time I see something like this, and I cannot even place it into any major bolete clade.


The context blues instantly, but it takes the color a few minutes to reach maximum intensity, at which time it slowly begins to fade away.
Staining of the context with 3% aqueous KOH (left half) and ammonia (aq) [right half]
Staining of the pileipellis with 3% aqueous KOH (left half) and ammonia (aq) [right half]

Proposed Names

-28% (1)
Recognized by sight
-28% (1)
Recognized by sight: Best matching the calopus-inedulis-roseipes clade
Used references: “North American Boletes” by Bessette-Roody-Bessette
46% (2)
Recognized by sight
33% (2)
Eye3 Eyes3
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: walt sturgeon (Mycowalt)
2018-02-14 18:36:20 CST (-0600)

Butyriboletus peckii

By: I. G. Safonov (IGSafonov)
2018-02-14 16:59:43 CST (-0600)

I believe this is the same mushroom as…
obs 104302
obs 246311
obs 246697 (sequenced)
obs 283600 (sequenced)
obs 286124 (sequenced)

Created: 2011-08-14 17:04:19 CDT (-0500)
Last modified: 2018-02-14 18:38:01 CST (-0600)
Viewed: 113 times, last viewed: 2018-06-18 22:07:26 CDT (-0500)
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