When: 2018-06-17

Collection location: Seven Tubs Natural Area, Pennsylvania, USA [Click for map]

Who: Dave W (Dave W)

Specimen available

At first, I did not recognize this pale-capped bolete as representing B. brunneus. Spore dimensions, chemical reactions, dark blue bruising on pores, yellow context staining blue all support brunneus. Found in an area where brunneus is often found. Hemlock, birch, oak.

Amount/prominence of reticulation on stipe varies considerably for B. brunneus. This example shows coarse reticulation covering the entire stipe surface.


Context in cap pale yellow prior to staining blue.
Spores 11-12 × 4-4.5.
KOH: left column.
Ammonia: right column.
Sequence from top down: cap surface, cap context, pore surface, stipe context.
Ammonia negative on context.

Proposed Names

87% (1)
Recognized by sight
Based on microscopic features
Based on chemical features

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Created: 2018-06-21 01:34:59 ACST (+0930)
Last modified: 2018-06-21 01:35:09 ACST (+0930)
Viewed: 11 times, last viewed: 2018-12-31 00:08:27 ACDT (+1030)
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