Observation 104263: Boletus sect. Boletus
When: 2012-08-05
No herbarium specimen
0 Sequences

A single fruitbody growing under mature oaks. Not related to the collection in Observation No. 104261, but could be the same species.


Too much light from the flash
Staining with KOH on the stipe

Proposed Names

28% (1)
Recognized by sight
-28% (1)
Recognized by sight
57% (1)
Eye3 Eyes3
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: I. G. Safonov (IGSafonov)
2012-08-08 17:35:50 CDT (-0400)

I have no problem with your assignment in this case. However, what about the collection in Obs. 104261? KOH stains their stipes the same color and the mushrooms look very similar to this one, but with much more prominent reticulation.

By: I. G. Safonov (IGSafonov)
2012-08-08 17:35:50 CDT (-0400)
Igor, given that X. purpureum…
By: Dave W (Dave W)
2012-08-08 16:59:16 CDT (-0400)

occurs with wide variation in the stipe color, I think this probably carries over to the KOH reaction on the stipe. Maybe that’s why B/R/B does not mention a KOH reaction on the stipe.

By: I. G. Safonov (IGSafonov)
2012-08-08 13:38:37 CDT (-0400)

I never said this was X. separans. X. separans is very easy to ID (fresh specimens of course) just by looking at it — it’s such a distinct looking bolete. I proposed genus Xanthoconium just because I was uncomfortable placing it in Boletus based on the overall appearance and KOH reaction.

KOH not right for X. seperans
By: Patrick Harvey (pg_harvey)
2012-08-08 13:29:34 CDT (-0400)

On Mushroom Expert X. seperans page, Michael Kuo writes it stains greenish with KOH.

Created: 2012-08-07 23:35:29 CDT (-0400)
Last modified: 2017-07-22 17:31:21 CDT (-0400)
Viewed: 89 times, last viewed: 2017-12-10 22:12:59 CST (-0500)
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