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This young specimen does not show the prominent reticulation generally seen on most of the B. brunneus stipe. But zooming in on the third posted photo, reticulations are seen on the upper portion of the stipe.

Bluing reaction weak for B. brunneus.

Macrochemical tests match the NAB/BRB profile for brunneus:
KOH: amber on cap surface; orange becoming muddy orange on pores; blue flash on stipe followed by saffron-yellow; orange-brown on stipe context.
Ammonia: mahogany on cap surface; pale orange on pores; negative on context.

Dominant tree type birch. Also present was oak, ash, one sapling hemlock, mountain laurel.

I’ll preserve half of this specimen. (Other half doused with chemicals.)

Many examples of B. brunneus found in previous years in this location.

Found shortly after significant rainfall.


10% KOH

Proposed Names

58% (1)
Recognized by sight: Color/stature.
Based on microscopic features: See notes

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= Observer’s choice
= Current consensus


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