Observation 141692: Boletus bicoloroides A.H. Sm. & Thiers

When: 2013-08-02

Collection location: Jasper Co., Missouri, USA [Click for map]

Who: Jon Shaffer (watchcat)

No specimen available

slow to bruise blue on stipe when cut. 5% KOH negative on stipe, flesh and cap. Taste is mild, not bitter (raw).

Mixed hardwood forest, mostly oak.

Proposed Names

28% (1)
Recognized by sight
62% (4)
Recognized by sight
62% (4)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Is bicoloroides…
By: Dave W (Dave W)
2017-06-10 11:17:59 WIB (+0700)

on record as occurring in Missouri? My understanding (possibly needs to be depreciated :-) is that bicoloroides is known only from the Great Lakes area.

If you have Meltzer’s…
By: Dave W (Dave W)
2017-06-08 11:07:25 WIB (+0700)

the amyloid spore reaction may be observable without a scope. I assume you would need a thick spore print to be certain of such a reaction. Scoping makes it easier to evaluate the reaction.

So you’re saying there are no field features to do the ID?
By: Scott Pavelle (Scott Pavelle)
2017-06-07 22:06:07 WIB (+0700)

Bicolor and bicoloroides are indistinguishable without a microscope?

By: Robert(the 3 foragers) (the3foragers)
2017-06-07 21:15:09 WIB (+0700)

I agree with Dave

According to Bessette, et al…
By: Dave W (Dave W)
2017-06-07 20:35:22 WIB (+0700)

the way to distinguish B. bicoloroides from the Baorangia bicolor types requires determining the spores are amyloid. But, if the spores are significantly longer than what is reported for bicolor (14-17 microns versus 8-12 microns), then a good case is made for bicoloroides.

Collections of what I call bicolor (here in PA) exhibit variable patterns of blue staining.

By: Jon Shaffer (watchcat)
2017-06-07 08:01:46 WIB (+0700)

Didn’t see the email but you have permission to use any of my photos. Jon Shaffer.

Robert, note the date.
By: Scott Pavelle (Scott Pavelle)
2017-06-06 22:24:51 WIB (+0700)

These are photos from back in 2013. He has a series of them in different observations. My thought is that the photos are worth using as exemplars even if I have to include a warning note that, “The ID is subject to debate but the picture is close enough to use as a guide with that proviso.”

It is
By: Robert(the 3 foragers) (the3foragers)
2017-06-06 21:48:06 WIB (+0700)

Very nice mushroom but to separate it from B bicolor we need a microscopic measurement on the pores. I hope you saved it for DNA study.

Just sent an email
By: Scott Pavelle (Scott Pavelle)
2017-06-05 10:01:24 WIB (+0700)

Would love to use these photos on the Bolete but the license calls for attribution, and your real name isn’t available. Please contact me.

TY John!
By: Jon Shaffer (watchcat)
2013-08-04 00:30:49 WIB (+0700)
Strip is a great indicator
By: John McDonough
2013-08-03 23:14:26 WIB (+0700)

More or less equal in size, solid, smooth not reticulated, and dark red from base to apex.
Bruises blue very slowly.

Very pretty contrast, excellent find!

ID help from Stephen Russell
By: Jon Shaffer (watchcat)
2013-08-03 12:19:45 WIB (+0700)
Inrolled margin and possibly pale yellow (ochre) KOH reaction seem to point to B. bicoloroides
By: Jon Shaffer (watchcat)
2013-08-03 10:42:59 WIB (+0700)

Created: 2013-08-03 08:45:53 WIB (+0700)
Last modified: 2017-06-08 23:43:12 WIB (+0700)
Viewed: 249 times, last viewed: 2018-04-21 08:52:41 WIB (+0700)
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