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Observation 101945: Boletus campestris group

When: 2012-07-18

Collection location: Hickory Run State Park, Carbon Co., Pennsylvania, USA [Click for map]

Who: Dave W (Dave W)

No specimen available

Notes:
When I first saw a group of small ones I initially thought “campestris.” But the stipes were quite punctate, which is not something I recall seeing on collections of campestris I have made. (B. campestris grows in my yard.) Then I spotted a few larger ones in a shady area of the same patch. The ones in the first photo have cap diameters around 3 inches. A couple others (same patch) seem too large and robust – stemmed for campestris.

Grassy wood border near a row of spruce on the border. Hardwoods behind the spruce.

Interesting chemical feature… KOH dark red on pores.

Images

Proposed Names

58% (1)
Recognized by sight
Based on chemical features: KOH negative on cap, pale orange on context in stipe.
87% (1)
Recognized by sight

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= Observer’s choice
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Comments

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Is B. rubellus considered to be one of…
By: Dave W (Dave W)
2012-07-19 06:27:07 CDT (-0500)

the members of the B. campestris group? Or is it better to call it the “Boletus fraterus group?”

Based upon size of fruit bodies, I think these are B. rubellus.