Observation 70013: Tylopilus williamsii Singer & J. García

When: 1993-07-03

Collection location: Lake Erling, Lafayette county, Arkansas, USA [Click for map]

Who: Ron Pastorino (Ronpast)

Specimen available

Found these some time ago and thought they were interesting. 18 years later I yet haven’t been able to put a name on them but they still are interesting.
They were growing near the lake among pine, probably Loblolly.
The caps were up to 7.5 cm across. The taste was bitter and the spore print was pinkish.
The stem was basically smooth without any reticulation,
The spores were ~ 7.8-10.1 X 3.9-5.1 microns, elongate to subcylindrical. Q(ave.) = 2.04.
Spores were nearly hyaline in KOH.



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Add Comment
I have found
By: Mary Smiley (ladyflyfsh)
2016-06-13 20:16:32 EDT (-0400)

stipe shape to be somewhat variable. I find these every year in Sarasota, FL and although most I have found have relatively straight non tapering stipes, I have found them with the robust, bulbous stipe more like what you would expect of Boletus edulis. Also some with very short, stubby stipes. All mine have been found in mixed hardwoods, mainly oak. These look like T. wiliamsii to me, based on photos, but of course looks can be deceiving.

Stipe tapering or equal or enlarged below.
By: walt sturgeon (Mycowalt)
2014-01-29 11:03:48 EST (-0500)

Often these notes are useful but in my experience it can be a variable feature.
Also it is possible that Bessettes and Roody may not have seen many collections of T. williamsii…

It is interesting that both
By: Ron Pastorino (Ronpast)
2014-01-29 00:16:33 EST (-0500)

collections show tapering stipes, but the description for T williamsii in the Bessette Bolete book only notes “nearly equal overall”.

By: walt sturgeon (Mycowalt)
2014-01-28 19:17:27 EST (-0500)


T. williamsii might be a long-shot.
By: Ron Pastorino (Ronpast)
2014-01-28 18:46:42 EST (-0500)

The area I found them is primarily a pine plantation. However, close to the lake, where these were found, the habitat was a little more mixed.

Purplish caps
By: Christian (Christian Schwarz)
2014-01-28 18:29:12 EST (-0500)

fairly smooth stipe… just going to throw this out: could it be Tylopilus williamsii? (the spores would be a little big, and I’m fairly sure it’s a hardwood associate).

Walt, Tylopilus rhoadsiae was what
By: Ron Pastorino (Ronpast)
2011-06-24 18:29:17 EDT (-0400)
I was going to “Could Be” guess but not only was the stipe basically smooth, the spores were a little too small.

Created: 2011-06-24 11:36:45 EDT (-0400)
Last modified: 2016-06-13 20:17:18 EDT (-0400)
Viewed: 230 times, last viewed: 2018-08-17 12:30:53 EDT (-0400)
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