Observation 210360: Boletus subfraternus Coker & Beers
When: 2015-07-16
0 Sequences

> A group of three specimens growing in the vicinity of mature oak and white pine.
> The largest fruiting body (pictured) has a cap diameter of 9-9.5 cm, which is too large for boletes in the rubellus/fraternus/campestris group.
> The dull rosy-red pileipellis glabrous and leathery, with just a touch of surface cracking.
> Xerocomoid and irregular pores of varying sizes: from 2-3 pores/mm at the cap edge to 1 pore/2mm near the stipe.
> The pore surface instantly bruising blue, but neither the cap nor stipe stain on handling.
> The context bright lemon yellow, staining blue slowly in select areas (see pix).
> Pleasant fungal odor.


Note the decurrent gill-like lines at the apex stretching down the stipe
Taken just after a few seconds following dissection
Bluing after a couple minutes following dissection

Proposed Names

28% (1)
Eye3 Eyes3
Used references: Mushroomexpert.com
Based on chemical features: KOH = rusty orange on cap; medium orange on context; NH4OH = yellow on cap; faint orange on context; FeSO4 = greenish-gray on cap; negative to pale gray on context

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Created: 2015-07-16 21:19:01 CDT (-0500)
Last modified: 2015-07-16 21:23:54 CDT (-0500)
Viewed: 31 times, last viewed: 2017-12-09 05:16:51 CST (-0600)
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