Observation 95681: Boletus pulverulentus Opat.
When: 2012-05-28
(35.5618° -84.2371° 259m)
Herbarium specimen reported

Notes: This bolete is yellow-pored.
Very rapidly staining to a deep blue.

On soil under hardwoods.

Proposed Names

28% (1)
Recognized by sight
53% (3)
Eye3 Eyes3
Recognized by sight
Used references: Guide des champignons de France et d’Europe – Courtecuisse

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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My collection linked in Christine’s comment…
By: Dave W (Dave W)
2012-06-01 05:39:03 PDT (-0700)

was made in a grassy area underneath an apple tree. B/R/B do not mention the KOH stained context change to orange in the NA bolete book account. Maybe my collection represents a variety of this species?

Or perhaps chemical reactions vary regionally? I have noticed that chemical reactions for some of my collections of boletes – that otherwise key out very well – do not always match up with those reported by B/R/B.

Also, it is my understanding that chemical reactions are most prominent when the material is very fresh. Often it is the case that a collection of mine may be several hours old before I get it home and apply a chemical.

Boletus pulverulentus
By: Christine Braaten (wintersbefore)
2012-05-28 11:02:31 PDT (-0700)

may be a good match. Application of NH4OH turns blue stained context to green and then to orange. If it is not apparent in the photos, the stipe is not reticulated.

KOH
By: Christine Braaten (wintersbefore)
2012-05-28 09:58:33 PDT (-0700)

Blued context did not turn orange as was reported in this observation: http://mushroomobserver.org/70431?q=Gpya

Created: 2012-05-28 09:32:08 PDT (-0700)
Last modified: 2012-05-28 11:04:41 PDT (-0700)
Viewed: 98 times, last viewed: 2015-09-14 15:38:50 PDT (-0700)
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