When: 2018-06-02

Collection location: Wilkes-Barre, Pennsylvania, USA [Click for map]

Who: Dave W (Dave W)

Specimen available

On a lawn under old-growth oak. No conifers in the area.

As seen in photo, chemical reactions s follows. Chemicals applied over 2 hours after mushrooms were collected.
KOH: black on cap surface, rusty brown on context, black on pore surface.
Ammonia: black on cap surface, pale orange on context, pale yellow on pore surface.

I think these are the “oak subvelutipes”.


Hairs at base of stipe.
Red context in extreme stipe base.
KOH on left; ammonia on right. Sequences from the top: cap surface, cap context, stipe context, pore surface.

Proposed Names

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Add Comment
Okay, Dave
By: I. G. Safonov (IGSafonov)
2018-06-02 22:52:56 CDT (-0500)

I am 100% convinced now, no conifers. :-)
I hope you would consider sampling this material for your NAMF project. I have no shortage of Neoboletus collections from the Gulf States to sequence later in the year. We have the ITS data of both subvelutipes and “chamaeleonis” on file.

Absolutely no conifers in the area.
By: Dave W (Dave W)
2018-06-02 22:34:48 CDT (-0500)

This area was planted with oaks and maples many years ago (lawn near the Luzerne County Courthouse).

Early… Yes! Actually, my friend who alerted me to this spot had found what appears to be Cyanoboletus pulverulentus 6/1. By the time I saw that material, it was kinda beat up and so the photos are not too good. This area is along a fairly busy road in Wilkes-Barre at relatively low elevation. Ground likely warms up more quickly than in shaded/sloping areas at higher elevation.

By: I. G. Safonov (IGSafonov)
2018-06-02 22:16:39 CDT (-0500)

Are you sure there were no conifers lurking nearby? Seems kinda early for the “oak subvelutipes” – granted both April and May were above average temperature-wise in our area – though I recall one early collection from NJ, obs 206608.

The colors seen in the posed photos are better.
By: Dave W (Dave W)
2018-06-02 22:02:17 CDT (-0500)

The second photo represents the colors quite well. Indeed, the ornamentation on the stipes is more like squamules than the tiny punctate dots typically seen on the conifer-associating subvelutipes.

Very nice :-)
By: I. G. Safonov (IGSafonov)
2018-06-02 21:15:23 CDT (-0500)

I think you are right, Dave. I wouldn’t be surprised if this turns out to be the same species by DNA as the many examples of this exceptionally polymorphic taxon I have sequenced in hopes of supporting the original hypothesis to the contrary suggested by the gross morphology. I already have a fitting name for this critter in mind, “Neoboletus chamaeleonis”. :-) Yes, the deprecated Neoboletus, for I am no longer embracing the idea of Sutorius applied to red-pored boletes with non-reticulated, squamulose stipes.
This fresh example sports well developed and very prominent squamules instead of the more common and much finer dotted-punctate pattern. For a moment I was fooled into thinking it could be subvelutipes itself, but the stipital ornamentation of Peck’s red-mouth is somewhat different. Still, there would remain some doubt till we have at least ITS sequenced to compare with the existing data. I would certainly hope that the current working hypothesis of subvelutipes being a strictly conifer-associated species will hold up.
Which picture(s) give a better presentation of the cap color — the one in the field or those taken on the concrete pad?

Created: 2018-06-02 20:32:41 CDT (-0500)
Last modified: 2018-06-02 22:52:57 CDT (-0500)
Viewed: 68 times, last viewed: 2018-12-29 18:56:51 CST (-0600)
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