Observation 102459: Boletus weberi group
When: 2012-07-22
No herbarium specimen

Notes: This interesting bolete (two fruitbodies), which remotely looks like Suillus spraguei, was found buried in sandy soil (only top of cap was visible) under pitch pines and scrub oaks.
The overall stature is more like of Suillus though, or maybe Fuscoboletinus. The rims of pore mouths are red, while the tubes themselves are yellow. This discoloration is not necessarily an inherent feature of this mushroom and could have been caused by the weather elements; I have seen a similar phenomenon in a yellow-pored boletes before (e.g., Obs. 767870).

The younger mushroom is 5 cm in height (from tip of root to top of pileus); the cap diameter is 4 cm; the stipe diameter is 1.3 cm.

No bruising of the pore surface or on cap/stipe; the pores are irregular and not radially arranged. The were droplets of greenish liquid (usually associated only with B. frostii) on the pore surface.

The flesh is dense and doesn’t stain when exposed to air.

Ammonia is negative on cap and flesh, but KOH stains both pale brown.


KOH stains flesh pale brown (right half); Ammonia is negative (left half)

Proposed Names

28% (1)
Recognized by sight
57% (1)
Eye3 Eyes3
Recognized by sight: See comments under this name in obs 179586

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Ha ha!
By: Martin Livezey (MLivezey)
2012-09-03 18:00:11 AKDT (-0800)

The unseen drama at NEMF. Good luck with that! Let us know what he finds out – and keep looking for more! I can’t help thinking about the Alan’s comment that some of these things only appear once every 40 or 50 years. I am not sure if he was joking or not, but you never know.

Thanks for asking, Martin
By: I. G. Safonov (IGSafonov)
2012-09-03 16:35:56 AKDT (-0800)

In short, the answer is “No”, but I gave the dried specimen to Roy Halling at the conclusion of the NEMF. I hope he finds the time to run DNA analysis or at least do some microscopy. I certainly want to think that this is a new species restricted to the coastal plane that will eventually be named after me. :-)

By: Martin Livezey (MLivezey)
2012-09-03 16:26:31 AKDT (-0800)

Did anyone ever come to a consensus on this one?

By: I. G. Safonov (IGSafonov)
2012-07-23 20:55:00 AKDT (-0800)

Quite a striking bolete, indeed. If this one were easy to ID, either you or I would have named it already. :-)

I have dried this specimen, and will eventually get some spore data (maybe at the NEMF). Perhaps then we would be able to at least place it into a genus.

By: I. G. Safonov (IGSafonov)
2012-07-23 20:44:47 AKDT (-0800)

I doubt this is B. flammans — there is no bluing on the pores or exposed flesh.

Could this be
By: Eric Smith (esmith)
2012-07-23 20:17:38 AKDT (-0800)

B. flammens?

Nice stem
By: walt sturgeon (Mycowalt)
2012-07-23 20:08:53 AKDT (-0800)

This should be easy to ID.

Created: 2012-07-22 18:02:30 AKDT (-0800)
Last modified: 2017-03-21 15:59:16 AKDT (-0800)
Viewed: 127 times, last viewed: 2017-03-26 12:19:28 AKDT (-0800)
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