Observation 74038: Tylopilus atronicotianus Both

When: 2011-08-15

Collection location: Woodloch Pines Resort, Pennsylvania, USA [Click for map]

Who: I. G. Safonov (IGSafonov)

No specimen available

If the ID checks out, this is my first time finding this “unkempt”, somber looking Tylopilus species. It’s been raining cats and dogs in NJ and eastern PA in the last couple of days, so these mushrooms endured quite a beating from the weather as judged by cracked cap and washed out, uneven pileus colors, though overall they held up nicely to the elements.
The older basidiocarp’s pileus measures about 5" in diameter and has a short and impressively thick stipe. The pore surface in both specimens is grayish in color. Growing on a grass with an old oak, younger hardwoods and a pine tree in the immediate vicinity.


1-2 minutes after dissection
A few minutes after dissection
3-4 hours after dissection
Macrochemical tests on pileipellis generally in line with the info in B-R-B, though reaction with ammonia vapor instantly produced a wide pale vinaceous area surrounding the liquid drop — this aspect is not mentioned in the book
Ammonia (aq) stains the context grayish pale yellow [on left]; 3% KOH (aq) produces an amber-orange reaction [on right] — both in line with B-R-B

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Used references: “North American Boletes” by Bessette-Roody-Bessette

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Created: 2011-08-15 21:55:53 PDT (-0700)
Last modified: 2011-08-15 21:59:42 PDT (-0700)
Viewed: 60 times, last viewed: 2018-05-12 02:50:38 PDT (-0700)
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