Observation 99185: Xerocomus sclerotiorum A.E. Bessette, M.E. Smith, A.R. Bessette & H. Hitchcock
When: 2012-06-20
No herbarium specimen

Notes: These were found in the Turkey Creek Unit.
They have most of the characteristics of B. rubricitrinus including the band of sterile tissue on the cap edge.
The spores also were olive brown and ~ 13.0-17.5 X 4.3-5.3 microns and subfusoid.
These are likely the same species as MO# 98976.

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By: I. G. Safonov (IGSafonov)
2016-10-19 22:03:48 EDT (-0400)

I first heard of this bolete at Alan Bessette’s COMA foray evening program last month. There is a fascinating story behind the discovery of this species. It’s also rather surprising from the point of gross morphology, and the strong bluing action, that it wound up in Xerocomus, which now exists legitimately as a sensu stricto genus with X. subtomentosus as the type species. Just by looking at the pictures I would have guessed that it should be closer to B. sensibilis and allies… Well, there have been a few taxonomic surprises in the Boletaceae recently, such as the transfer of B. projectellus to Aureoboletus and B. hortonii to Xerocomus. Morphology can be misleading, but the genes never lie. :-)

Arleen and Mary…
By: Ron Pastorino (Ronpast)
2016-10-19 20:50:29 EDT (-0400)

Thank you for the updates.

X. sclerotiorum A.E. Bessette, M.E. Smith, A.R. Bessette & H. Hitchcock nom. prov.
By: Arleen Bessette (MsMucor2)
2016-10-19 17:37:40 EDT (-0400)

Distinguishing features include the bright yellow sterile margin, white mycelium with yellow rhizomorphs and the formation of yellow sclerotia. Associated with oaks. Range from New England, south to Florida and now west to Texas based on this observation. Spores: (12)14-16(18) X 5-7 micrometers.

This appears
By: Mary Smiley (ladyflyfsh)
2016-10-19 16:41:35 EDT (-0400)

to be a newly described bolete by Alan and Arleen Bessette by the name of Xerocomus sclerotiorum.

Created: 2012-07-04 19:14:19 EDT (-0400)
Last modified: 2016-10-20 00:17:39 EDT (-0400)
Viewed: 288 times, last viewed: 2016-10-28 09:37:02 EDT (-0400)
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