Observation 33834: Xerocomus Quél.

When: 2004-08-07

Collection location: Wick Park, Leetonia, Ohio, USA [Click for map]

Who: walt sturgeon (Mycowalt)

No specimen available

Under oaks. Checking the MO archives we either have a very variable species or several misidentifications. I will be interested in the groups opinions.

[admin – Sat Aug 14 02:02:17 +0000 2010]: Changed location name from ‘Leetonia Park, Columbiana Co. OH’ to ‘Leetonia Park, Columbiana Co., Ohio, USA’


Proposed Names

29% (1)
Recognized by sight
58% (1)
Recognized by sight

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= Observer’s choice
= Current consensus


Add Comment
I think
By: Irene Andersson (irenea)
2010-02-20 06:24:32 CST (-0500)

this could belong to the Xerocomus chrysenteron group. I don’t know what you have in North America, but european species so far are Xerocomus chrysenteron, X. cisalpinus, X. pruinatus, X. ripariellus, X. dryophilus, X. fennicus, X. porosporus and X. rubellus (X. communis may not belong in the same clade, but keys out here).

We have a hard time with subtomentosus in Europe too, with a bunch of new (or rediscovered) species that I think most of us have treated as various forms of it. Other names that belong in this group (in Europe) are X. chrysonemus, X. silwoodensis, and X. ferrugineus which probably is the most frequent species, misidentified as subtomentosus..

I know that the Xerocomus species are treated as Boletus by some, but it would be more convenient with a separate genus (as in MycoBank).

Things that need to be checked on a Xerocomus are endcells in the cap cuticle (striate incrustations in the chrysenteron group), spore shape and colour (to see possible striations on them in Melzer’s needs a very good microscope), colours after bruising and cutting, colours of the flesh, particularly in the stem base.

Not like
By: Irene Andersson (irenea)
2010-02-20 03:45:51 CST (-0500)

what we call subtomentosus in Europe either.

I collected
By: Noah Siegel (Noah)
2010-02-20 01:45:17 CST (-0500)

the western “subtomentosus” when I was out there and had no idea what it was and brought it to Christian who said “that’s subtomentosus”… it’s really different

By: Darvin DeShazer (darv)
2010-02-20 01:22:33 CST (-0500)

It doesn’t look like anything we call B. subtomentosus on the west coast.

Created: 2010-02-19 18:21:33 CST (-0500)
Last modified: 2015-02-18 14:33:56 CST (-0500)
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