Observation 104213: Boletus L.

When: 2012-08-06

Collection location: Hunlock Creek, Pennsylvania, USA [Click for map]

Who: Dave W (Dave W)

Specimen available

Mystery Bolete #2 for 8/6/12.

Pores orange, yellow near the margin, turning yellow.

Context yellow, quickly greenish blue, then dark blue.

KOH: blackish mahogany on cap; immediately orange on cap context; bright orange on stipe context.

Proposed Names

58% (1)
Eye3 Eyes3
Recognized by sight
29% (1)
Recognized by sight: Closest match that I could find in the big NA bolete book.

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
This mushroom has been preserved.
By: Dave W (Dave W)
2014-04-17 11:18:38 CDT (-0400)

If anyone is interested, it is available for study.

Hello, Dave —
By: I. G. Safonov (IGSafonov)
2012-08-10 01:27:01 CDT (-0400)

I found a bolete looking very similar to yours, in excellent shape. It has orange pores with a yellow circumferencial band around the cap edge. The entire stipe is covered with what appears to be dense pruinosity. It is dark yellow at the top, bronwish in the middle and and red on the lower third. Under a lens the pruinosity looks like raised, scruffy horizontal tufts, forming a pattern. Anyway, a picture is worth a thousand words. I was able to take several photos of those through a 7X lens. :-) I will be posting the observation sometime tomorrow. Nighty-night…

Thanks for the suggestions, Igor.
By: Dave W (Dave W)
2012-08-10 00:40:59 CDT (-0400)

Pore color seems off for either vermiculosus and vermiculosoides. Last year I found a lot of what I IDed as vermiculosoides… never any yellow on the pores, either rich brown or dingy when older. The B/R/B description of pore color for vermiculosus seems similar. Stipes on the collection seen here are what I would call punctate rather than pruinose. KOH reaction for this collection matches vermiculosides fairly well.

The possibility that had caught my attention (and yours, Igor) was B. fagicola. Once again, the difference between punctate and pruinose becomes relevant. The stipes on the collection seen here are covered with dots that are well isolated, especially on the upper parts of the stipes. Also, there are absolutely no reticualtions on any of these stipes. Still, I was left with the impression that fagicola may be the closest thing to this.

I’ll propose B. fagicola as a “could be” ID. At least this uncommon name will probably attract some attention, and maybe someone will offer additional input.

By: I. G. Safonov (IGSafonov)
2012-08-08 18:20:31 CDT (-0400)

Could these be related to B. vermiculosus/vermiculosoides/fagicola? The yellow stipes with brownish pruinosity point in that direction. And of course, bluing all over — contex and surface. The pore color is weird — orange when mature. I wonder what color it was in young specimens — browish or red?

Created: 2012-08-07 11:31:22 CDT (-0400)
Last modified: 2012-08-10 00:41:54 CDT (-0400)
Viewed: 70 times, last viewed: 2017-11-10 19:54:07 CST (-0500)
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