Observation 200006: Boletus L.
When: 2014-09-16
No herbarium specimen

Notes: Terrestrial in mixed woods.

Proposed Names

-6% (4)
Used references: MO. observations
45% (2)
Recognized by sight: The red-capped ones with yellow stipe are confusing.
32% (4)
Recognized by sight: Combination of blue and brown bruising on pores.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Thanks, Phil
By: I. G. Safonov (IGSafonov)
2015-03-02 17:58:28 CST (-0600)

Cap context reddening is rather unusual for such boletes. Who knows — it could be species-specific phenomenon. The stipe context on the other hand is frequently deep red in tissue damaged by fly larvae… I doubt we would be making much progress in putting names on these cryptic bluing red-and-yellow boletes without DNA sequencing.

Hello I.G.
By: Phil Yeager (gunchky)
2015-03-02 17:35:52 CST (-0600)

The reddish color on the context is real. This was brought to me and I don’t remember or think that I used any chemicals to produce that reaction.

The ammonia test…
By: I. G. Safonov (IGSafonov)
2015-03-02 15:24:39 CST (-0600)

… on the cap surface would have been useful to prove B. sensibilis. Judging from the pictured morphology & vivid staining, I agree with Dave and Walter than this is not B. bicolor.

I noticed the reddening of the cap context in the pix. Is this real or some kind of digital photography artifact?

Compare with…
By: Dave W (Dave W)
2015-03-02 12:36:19 CST (-0600)
By: Phil Yeager (gunchky)
2015-03-01 20:06:17 CST (-0600)

with your obs. B. pseudosensibilis has a stipe with slight tinges of red. The reddish coloration on this obs is quite prominent. I also think that the cap color on this more closely matches B. bicolor than your proposal.

Phil, I think this…
By: Dave W (Dave W)
2015-03-01 15:30:19 CST (-0600)

is something other than bicolor. Not enough red on stipe, reddish color on cap is more “brick” than “rosy”, bluing on cut context of entire stipe, and brown bruise on pores all point away from bicolor.

Created: 2015-03-01 14:47:22 CST (-0600)
Last modified: 2016-01-24 13:52:49 CST (-0600)
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