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When: 2008-09-30

Collection location: Udoli, Novy Hradec, Southern Bohemia, Czech Republic [Click for map]

Who: Gerhard Koller (Gerhard)

Specimen available

There is also a possibility this to be X.cisalpinus or X.declivitatus and it is not yet spoken. The find belongs to the hardly distinguishable group around the Xerocomi with slightly ripped spores to which belongs X.pruinatus too. If X. ripariellus is correct, then it grew under aspen.

[admin – Sat Aug 14 02:07:06 +0000 2010]: Changed location name from ‘Udoli,Novy Hradec,Southern Bohemia,Czech Republic’ to ‘Udoli, Novy Hradec, Southern Bohemia, Czech Republic’


Proposed Names

34% (2)
Recognized by sight
Used references
Based on microscopic features
Based on chemical features
64% (1)
Recognized by sight: The apricot color of the context, next to the stipe base, indicate this species. Also note the upper stipe surface with red fibrils on yellow background. The current name would rather be Rheubarbariboletus armeniacus. For X. ripariellus it is very important to state the ecological setting.

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= Observer’s choice
= Current consensus


Add Comment
Blueing of the pores
By: Andreas Gminder (mollisia)
2009-06-10 00:16:50 PDT (-0700)

The blueing of the pores is not unusual in (older) X. pruinatus, so this would not speek against this species. X. cisalpinus should turn blue in the whole context (flesh) equally from stipe base to cap margin, therefore I would not think that it is this species. I don’t know X. ripariellus by own sight, so cannot judge really, but usually this species is depicted with more obviousely red cap colouration.

Was ist mit den Waschblau der Poren?
By: Paul Derbyshire (Twizzler)
2009-06-10 00:00:52 PDT (-0700)
Or even X. pruinatus?
By: Andreas Gminder (mollisia)
2009-06-09 23:56:35 PDT (-0700)

Hallo Gerhard, die auffallend nur im unteren Stielbereich stattfindende Blauverfärbung würde sehr auf Xerocomus pruinatus hindeuten. X. cisalpinus blaut viel stärker und im gesamten Fleisch, den kannst Du aus der Auswahl streichen.