Observation 8871: Boletaceae Chevall.

When: 2008-08-05

Collection location: Babcock State Park, Fayette Co., West Virginia, USA [Click for map]

Who: Dan Molter (shroomydan)

No specimen available

I was unable to find a bolete that looked like this in my field guides.


two bloodshot eyes

Proposed Names

6% (4)
Recognized by sight: The group to look closely at would be: C. rubinelleus, C. pseudorubinellus & C. rubritubifer.
69% (7)
Recognized by sight
4% (3)
Recognized by sight
86% (1)
Used references: As per discussion here: mushroomobserver.org/name/show_name/14925

Please login to propose your own names and vote on existing names.

= Observer’s choice
= Current consensus


Add Comment
could be
By: Dan Molter (shroomydan)
2009-11-23 17:49:51 CST (-0600)

You can see that this mushroom was growing in a well mowed lawn. It was under a large hardwood tree, Oak if I recall, but it might have been maple. I did not remove a leaf, but I did clip a little grass in front of it so that you could see the base. The mushroom was growing by itself. If a leaf was on it, then it blew away before I found it. There were very few leaves on the lawn.

could it be ?
By: Johannes Harnisch (Johann Harnisch)
2009-11-23 13:51:35 CST (-0600)

that there was a leaf or some thing on the cap….? also you would need more specimens then this to make an accurate ID…..

By: Dan Molter (shroomydan)
2009-11-21 09:17:33 CST (-0600)

It looks like a sunburned pig skin.

Boletus bicolor
By: Dan Molter (shroomydan)
2009-11-21 08:21:27 CST (-0600)

Boletus bicolor looks about right, but the pattern of yellow and red on the cap seems very strange for that species.

In this observation of B. bicolor,


the yellow and red blend smoothly.

The mushroom in the present observation shows a clear line of demarcation between yellow and red.

blueing rxn. in boletes
By: Debbie Viess (amanitarita)
2009-11-20 11:09:54 CST (-0600)

Tom Volk gives a nice treatment of the chemistry involved here:

I think that we have insufficient information to make a good ID here…
By: Debbie Viess (amanitarita)
2009-11-20 11:05:19 CST (-0600)

finding younger material as well as mature forms would help a lot; also context, bluing rxns., color of basal mycelia, etc.

orange colored pores suggest Chalciporus pseudorubinellus; over-all coloration suggests Boletus bicolor (which can also have reddening pores at age).

the fact that Dan didn’t immediately think that this bolete was a bicolor, which is a very common mushroom in the Midwest, makes me lean towards the Chalciporus ID.

Closer to the B. bicolor/speciosus group?
By: Dimitar Bojantchev (dimitar)
2009-11-20 08:12:09 CST (-0600)

Aren’t these closer to the B. bicolor/speciosus group?

Which we did see with Dan in this very forest.


Chemistry of Bruising
By: Kathryn Kauffman (k6logc)
2009-11-20 02:25:27 CST (-0600)

Could someone explain the specific chemistry of blue bruising in boletes?

I’ve hunted around a bit for this but haven’t sorted out whether there is a standard set of reactants that are involved.

Thank you!

Chalciporus stands out in several ways…
By: Debbie Viess (amanitarita)
2008-08-12 10:59:34 CDT (-0500)

…with copper-colored pores at maturity, sometimes with yellow mycelia at stipe base, and a stipe that is remarkable in what it DOESN’T have: glandular dots, partial veil, annulus, reticulation or scabers.

Getting it to sp. can be a bit more difficult, although there are only five in N. America.

Boletus sp, but did it turn blue?
By: Dimitar Bojantchev (dimitar)
2008-08-12 09:13:34 CDT (-0500)

This is a Boletus sp.

This would have been, an easy id had you made one or two additional steps. The five rules of collecting Boletes:

1) SPORE PRINT COLOR – please always make a careful observation of
that – this does the HEAVY LIFTING down to Genus for you. PINK,
CINNAMON, OLIVE, etc. Then you know whether’ you’re dealing with
Tylopilus, Leccinum, Boletus and so forth…

2) DISCOLORATION reactions – observe carefully
a) On sponge
b) On stipe
c) On context

3) TASTE – some Tylopili (mainly) are bitter. This can be a
huge factor when comparing similarly looking brownish/tan species.

4) MACROCHEMICAL reactions – you don’t need much. Just NAHO4 and
KOH do most of the heavy lifting in this group. Use them, make
notes and photos.

5) SLICE them – other than the context discoloration, in the case
of Gyroporus you may see a hollow stipe – that does your id right

By: Erin Page Blanchard (CureCat)
2008-08-11 06:36:59 CDT (-0500)

The pileus looks like the hide of a decomposing pig. Heh.