When: 2017-06-25

Collection location: Monticello, Charlottesville, Virginia, USA [Click for map]

Who: dario.z (dario13)

Specimen available

Notes: Odor reminiscent of beef bouillon.
Collected for Igor.



Proposed Names

62% (3)
Recognized by sight
46% (2)
Recognized by sight: vivid rose-red cap and lower stipe. Pore surface that transitions smoothly into the stipe surface. Very thin layer of tubes.

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= Observer’s choice
= Current consensus


Add Comment
Voucher transfer
By: I. G. Safonov (IGSafonov)
2018-07-13 22:15:41 EDT (-0400)

This material sent to me by Dario has been moved to the University of South Florida (USF) Herbarium. The accession number is USF 297995.

Not a bug hole to be seen…
By: Scott Pavelle (Scott Pavelle)
2017-06-29 08:52:18 EDT (-0400)

Dario, is it normal for you to find bicolors without any larval tunnels? What about pallidoroseus?

This came up in several of my observations last year, such as Observation 246185. Obvious “bicolors” from nearby were usually rife with red bug holes. These big, bulbous ones were uniformly bug free. I see a similar pattern in some of your obsies such as Observation 243441. Big, bulbous, oversized “bicolor types” with no bugs get classified as pallidoroseus when they are paler and have a bouillon odor. Straight-stemmed, darker, usually-buggy, and odor free specimens get classified as bicolor.

I do not purport to have answers, but I think there are questions that need to be asked and patterns that need to be addressed. Is it appropriate to limit pallidoroseus to paler colors? I think the resistance to your initial ID here is based largely on “too red.” How strong a characteristic is that in real life?

Is the clavate to bulbous stem an indicator for pallidoroseus or some crypto-species between the two? Is the large size an indicator? Is bicolor as a species different for mycelium that produce bigger mushrooms? Is the lack of bug holes an indicator?

Finally, I pointed to a consistent bluing pattern in my collections of these “bulbous types.” It took several minutes to appear, but the center of the stem eventually turned a light blue or blue/green, which then faded a few minutes later. I’ve seen that pattern in some of your observations too. Is the bluing pattern an identification trait? Did you see it here? My specimens also dried into spectacular, even yellow chips that didn’t have a lot of flavor compared to the straight-stemmed bicolors. Have you seen the same?

I’m not going to argue for any particular ID here. I’m not qualified to do so by training or experience. But I do argue that this branch of the “bicolor group” seems to have some common features that other branches do not. Some part of me wants to shove those features onto pallidoroseus but I recognize that this would be a leap from hypothesis to conclusion. That big a step isn’t justified. But I really, really think we should consider the hypothesis in a serious way. “Bicolor”, “pallidoroseus” and “other” need to have their field characteristics reexamined and hopefully better refined.


I agree, Dave
By: I. G. Safonov (IGSafonov)
2017-06-27 01:07:25 EDT (-0400)

The morphology here is more in line with bicolor despite the characteristic FBO (fruiting body odor). :-)
Last year Dario collected many examples of what looks like bicolor without the smooth transition of the hymonophore to the stipe, e.g., obs 242904 and obs 243441. I voted pallidoroseus for most of those. I would bet pallidoroseus is likely to be transferred to Baorangia, but the genetic evidence is not there yet for this to happen. Someone will need to sequence Ernst Both’s type.

Created: 2017-06-26 23:54:40 EDT (-0400)
Last modified: 2018-07-13 22:15:42 EDT (-0400)
Viewed: 106 times, last viewed: 2019-10-05 20:23:01 EDT (-0400)
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