Observation 24524: Boletus separans Peck
When: 2009-08-18
Herbarium specimen reported

Notes: I have seen this type of thing once before (solitary completely chalky white pored mushroom… not Suillus); about 20 years ago in Vermont. And the habitat was similar, disturbed ground nearby a wood border. In this present case, mixed hardwoods. This area is where I typically find good fruitings of Xanthoconium seperans; so I thought this may be an albino form of X. seperans. But the KOH reactions are way off for this one… yellowish on the cap and negative on both stipe and stipe context. The stalk reticulations are distinct, but not roughened/shaggy, as in Austroboletus subflavidus.

Taste was pleasant, like one of the really good boletes. (I refrained from eating it :-).) I doubt any spores will fall; the pore openings are still really tight.

Proposed Names

53% (3)
Eye3
Based on chemical features: See “Notes.”
61% (2)
Eyes3
Recognized by sight: Non-typically pale.
Based on microscopic features: Similarly weirdly warped spores have been recorded for Xanthoconium purpureum.

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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When I had attempted to get a spore print on this mushroom
By: Dave in NE PA
2009-09-13 09:33:32 PDT (-0700)

it didn’t amount to very much. Tapped the cap and put the slide under the scope and saw what looked to me like Entoloma spores (just added the pic). I figured that I must have mistakenly used a slide that had not been cleaned, because these could not possibly be spores from a bolete.

Just got done reading up on X. purpureum on Mushroom Expert. Kuo shows a group of malformed specimens of this species. He mentions that the malformed version produces “contorted” spores…! So, maybe my pic really does show bolete spores.

I think it’s an albino X. seperans.
By: Dave in NE PA
2009-08-19 17:35:54 PDT (-0700)

Later tonight I’ll post two pics of an X. seperans which I found today… only 6 feet from where obs 24524 had been found yesterday. This new one’s pretty bleached out. I also found a few fairly bleached out B. ornitapes today. Guess the rain last week really got things going, but the dry heat that followed for a few days afterward must’ve played some tricks on the shrooms. Now they’re playing tricks on us.

Still, the KOH reaction profile does not fit either seperans or variipes. Maybe the albinos lose their KOH staining identities? Variipes is a common mushroom in the immediate area where this one was found; not this year though. But I havta say that variipes can’t be ruled out.

The one I had found (years back) in VT was probably a different species. Interestingly though, a lot of the observable featues were very similar (as I recall, except it was larger than 24524).

Dave,
By: Noah Siegel (Noah)
2009-08-19 04:08:43 PDT (-0700)

I would call it something in the variipes group

Created: 2009-08-18 22:40:29 PDT (-0700)
Last modified: 2014-03-21 14:04:18 PDT (-0700)
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