Observation 103357: Boletus L.

When: 2012-07-28

Collection location: Kintnersville, Pennsylvania, USA [Click for map]

Who: I. G. Safonov (IGSafonov)

No specimen available

For all of you, bolete aficionados, here is an interesting one that doesn’t quite look like anything in the big bolete book. These were found in mixed hardwoods with oaks present. Some elements of this mushoom are reminiscent of other boletes, but when taken together don’t lead to a conclusive ID.

I took most of the pics without the flash under natural light (ISO-400, exposure time = 1/200 to 1/400 sec), so the colors are pretty accurate.

The pore surface is pale yellow to greenish and bruising light blue-green in the older specimen (not so obvious in the young one), changing over to pale brown. The tubes appear not to be xerocomoid (i.e. separate cleanly from each other when pulled apart). The cap in the older specimen was sticky when wet. The stipe is not reticulated, but the surface is minutely scruffy under a lens (7x magnification). KOH stains the context pale yellow-orange; NHOH4 is negative on context. Odor is pleasant, taste is mild. I’ve preserved the hymenium of the older mushroom, so will hopefully get the spore measurement this week (at the NEMF foray).

Species Lists



Immediately after dissection
Ammonia is negative on context (left half); KOH stains context pale yellow-orange (right half)

Proposed Names

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Recognized by sight

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Add Comment
By: I. G. Safonov (IGSafonov)
2012-07-30 20:41:40 CEST (+0200)

The colors of the pileipellis, the stipe and the flesh are way off for this to be in the rubellus-campestris group, and, as you pointed out, the bluing action is rather feeble.

Maybe something from the rubellus/campestris group?
By: Dave W (Dave W)
2012-07-30 20:23:05 CEST (+0200)

Except, I’d expect more bluing on the pores with these types.

Created: 2012-07-30 04:35:51 CEST (+0200)
Last modified: 2012-07-30 04:35:53 CEST (+0200)
Viewed: 71 times, last viewed: 2017-09-29 16:40:31 CEST (+0200)
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